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Looping over commits for a file with jGit

- by Andy Jarrett

I've managed to get to grips with the basics of jGit file in terms of connecting to a repos and adding, commiting, and even looping of the commit messages for the files. File gitDir = new File("/Users/myname/Sites/helloworld/.git"); RepositoryBuilder builder = new RepositoryBuilder(); Repository repository; repository = builder.setGitDir(gitDir).readEnvironment() .findGitDir().build(); Git git = new Git(repository); RevWalk walk = new RevWalk(repository); RevCommit commit = null; // Add all files // AddCommand add = git.add(); // add.addFilepattern(".").call(); // Commit them // CommitCommand commit = git.commit(); // commit.setMessage("Commiting from java").call(); Iterable<RevCommit> logs = git.log().call(); Iterator<RevCommit> i = logs.iterator(); while (i.hasNext()) { commit = walk.parseCommit( i.next() ); System.out.println( commit.getFullMessage() ); } What I want to do next is be able to get all the commit message for a single file and then be able revert the single file back to a specific reference/point in time.

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Writing Unit Tests for ASP.NET Web API Controller

- by shiju

In this blog post, I will write unit tests for a ASP.NET Web API controller in the EFMVC reference application. Let me introduce the EFMVC app, If you haven't heard about EFMVC. EFMVC is a simple app, developed as a reference implementation for demonstrating ASP.NET MVC, EF Code First, ASP.NET Web API, Domain-Driven Design (DDD), Test-Driven Development (DDD). The current version is built with ASP.NET MVC 4, EF Code First 5, ASP.NET Web API, Autofac, AutoMapper, Nunit and Moq. All unit tests were written with Nunit and Moq. You can download the latest version of the reference app from http://efmvc.codeplex.com/ Unit Test for HTTP Get Let’s write a unit test class for verifying the behaviour of a ASP.NET Web API controller named CategoryController. Let’s define mock implementation for Repository class, and a Command Bus that is used for executing write operations. [TestFixture] public class CategoryApiControllerTest { private Mock<ICategoryRepository> categoryRepository; private Mock<ICommandBus> commandBus; [SetUp] public void SetUp() { categoryRepository = new Mock<ICategoryRepository>(); commandBus = new Mock<ICommandBus>(); } The code block below provides the unit test for a HTTP Get operation. [Test] public void Get_All_Returns_AllCategory() { // Arrange IEnumerable<CategoryWithExpense> fakeCategories = GetCategories(); categoryRepository.Setup(x => x.GetCategoryWithExpenses()).Returns(fakeCategories); CategoryController controller = new CategoryController(commandBus.Object, categoryRepository.Object) { Request = new HttpRequestMessage() { Properties = { { HttpPropertyKeys.HttpConfigurationKey, new HttpConfiguration() } } } }; // Act var categories = controller.Get(); // Assert Assert.IsNotNull(categories, "Result is null"); Assert.IsInstanceOf(typeof(IEnumerable<CategoryWithExpense>),categories, "Wrong Model"); Assert.AreEqual(3, categories.Count(), "Got wrong number of Categories"); } The GetCategories method is provided below: private static IEnumerable<CategoryWithExpense> GetCategories() { IEnumerable<CategoryWithExpense> fakeCategories = new List<CategoryWithExpense> { new CategoryWithExpense {CategoryId=1, CategoryName = "Test1", Description="Test1Desc", TotalExpenses=1000}, new CategoryWithExpense {CategoryId=2, CategoryName = "Test2", Description="Test2Desc",TotalExpenses=2000}, new CategoryWithExpense { CategoryId=3, CategoryName = "Test3", Description="Test3Desc",TotalExpenses=3000} }.AsEnumerable(); return fakeCategories; } In the unit test method Get_All_Returns_AllCategory, we specify setup on the mocked type ICategoryrepository, for a call to GetCategoryWithExpenses method returns dummy data. We create an instance of the ApiController, where we have specified the Request property of the ApiController since the Request property is used to create a new HttpResponseMessage that will provide the appropriate HTTP status code along with response content data. Unit Tests are using for specifying the behaviour of components so that we have specified that Get operation will use the model type IEnumerable<CategoryWithExpense> for sending the Content data. The implementation of HTTP Get in the CategoryController is provided below: public IQueryable<CategoryWithExpense> Get() { var categories = categoryRepository.GetCategoryWithExpenses().AsQueryable(); return categories; } Unit Test for HTTP Post The following are the behaviours we are going to implement for the HTTP Post: A successful HTTP Post operation should return HTTP status code Created An empty Category should return HTTP status code BadRequest A successful HTTP Post operation should provide correct Location header information in the response for the newly created resource. Writing unit test for HTTP Post is required more information than we write for HTTP Get. In the HTTP Post implementation, we will call to Url.Link for specifying the header Location of Response as shown in below code block. var response = Request.CreateResponse(HttpStatusCode.Created, category); string uri = Url.Link("DefaultApi", new { id = category.CategoryId }); response.Headers.Location = new Uri(uri); return response; While we are executing Url.Link from unit tests, we have to specify HttpRouteData information from the unit test method. Otherwise, Url.Link will get a null value. The code block below shows the unit tests for specifying the behaviours for the HTTP Post operation. [Test] public void Post_Category_Returns_CreatedStatusCode() { // Arrange commandBus.Setup(c => c.Submit(It.IsAny<CreateOrUpdateCategoryCommand>())).Returns(new CommandResult(true)); Mapper.CreateMap<CategoryFormModel, CreateOrUpdateCategoryCommand>(); var httpConfiguration = new HttpConfiguration(); WebApiConfig.Register(httpConfiguration); var httpRouteData = new HttpRouteData(httpConfiguration.Routes["DefaultApi"], new HttpRouteValueDictionary { { "controller", "category" } }); var controller = new CategoryController(commandBus.Object, categoryRepository.Object) { Request = new HttpRequestMessage(HttpMethod.Post, "http://localhost/api/category/") { Properties = { { HttpPropertyKeys.HttpConfigurationKey, httpConfiguration }, { HttpPropertyKeys.HttpRouteDataKey, httpRouteData } } } }; // Act CategoryModel category = new CategoryModel(); category.CategoryId = 1; category.CategoryName = "Mock Category"; var response = controller.Post(category); // Assert Assert.AreEqual(HttpStatusCode.Created, response.StatusCode); var newCategory = JsonConvert.DeserializeObject<CategoryModel>(response.Content.ReadAsStringAsync().Result); Assert.AreEqual(string.Format("http://localhost/api/category/{0}", newCategory.CategoryId), response.Headers.Location.ToString()); } [Test] public void Post_EmptyCategory_Returns_BadRequestStatusCode() { // Arrange commandBus.Setup(c => c.Submit(It.IsAny<CreateOrUpdateCategoryCommand>())).Returns(new CommandResult(true)); Mapper.CreateMap<CategoryFormModel, CreateOrUpdateCategoryCommand>(); var httpConfiguration = new HttpConfiguration(); WebApiConfig.Register(httpConfiguration); var httpRouteData = new HttpRouteData(httpConfiguration.Routes["DefaultApi"], new HttpRouteValueDictionary { { "controller", "category" } }); var controller = new CategoryController(commandBus.Object, categoryRepository.Object) { Request = new HttpRequestMessage(HttpMethod.Post, "http://localhost/api/category/") { Properties = { { HttpPropertyKeys.HttpConfigurationKey, httpConfiguration }, { HttpPropertyKeys.HttpRouteDataKey, httpRouteData } } } }; // Act CategoryModel category = new CategoryModel(); category.CategoryId = 0; category.CategoryName = ""; // The ASP.NET pipeline doesn't run, so validation don't run. controller.ModelState.AddModelError("", "mock error message"); var response = controller.Post(category); // Assert Assert.AreEqual(HttpStatusCode.BadRequest, response.StatusCode); } In the above code block, we have written two unit methods, Post_Category_Returns_CreatedStatusCode and Post_EmptyCategory_Returns_BadRequestStatusCode. The unit test method Post_Category_Returns_CreatedStatusCode verifies the behaviour 1 and 3, that we have defined in the beginning of the section “Unit Test for HTTP Post”. The unit test method Post_EmptyCategory_Returns_BadRequestStatusCode verifies the behaviour 2. For extracting the data from response, we call Content.ReadAsStringAsync().Result of HttpResponseMessage object and deserializeit it with Json Convertor. The implementation of HTTP Post in the CategoryController is provided below: // POST /api/category public HttpResponseMessage Post(CategoryModel category) { if (ModelState.IsValid) { var command = new CreateOrUpdateCategoryCommand(category.CategoryId, category.CategoryName, category.Description); var result = commandBus.Submit(command); if (result.Success) { var response = Request.CreateResponse(HttpStatusCode.Created, category); string uri = Url.Link("DefaultApi", new { id = category.CategoryId }); response.Headers.Location = new Uri(uri); return response; } } else { return Request.CreateErrorResponse(HttpStatusCode.BadRequest, ModelState); } throw new HttpResponseException(HttpStatusCode.BadRequest); } The unit test implementation for HTTP Put and HTTP Delete are very similar to the unit test we have written for HTTP Get. The complete unit tests for the CategoryController is given below: [TestFixture] public class CategoryApiControllerTest { private Mock<ICategoryRepository> categoryRepository; private Mock<ICommandBus> commandBus; [SetUp] public void SetUp() { categoryRepository = new Mock<ICategoryRepository>(); commandBus = new Mock<ICommandBus>(); } [Test] public void Get_All_Returns_AllCategory() { // Arrange IEnumerable<CategoryWithExpense> fakeCategories = GetCategories(); categoryRepository.Setup(x => x.GetCategoryWithExpenses()).Returns(fakeCategories); CategoryController controller = new CategoryController(commandBus.Object, categoryRepository.Object) { Request = new HttpRequestMessage() { Properties = { { HttpPropertyKeys.HttpConfigurationKey, new HttpConfiguration() } } } }; // Act var categories = controller.Get(); // Assert Assert.IsNotNull(categories, "Result is null"); Assert.IsInstanceOf(typeof(IEnumerable<CategoryWithExpense>),categories, "Wrong Model"); Assert.AreEqual(3, categories.Count(), "Got wrong number of Categories"); } [Test] public void Get_CorrectCategoryId_Returns_Category() { // Arrange IEnumerable<CategoryWithExpense> fakeCategories = GetCategories(); categoryRepository.Setup(x => x.GetCategoryWithExpenses()).Returns(fakeCategories); CategoryController controller = new CategoryController(commandBus.Object, categoryRepository.Object) { Request = new HttpRequestMessage() { Properties = { { HttpPropertyKeys.HttpConfigurationKey, new HttpConfiguration() } } } }; // Act var response = controller.Get(1); // Assert Assert.AreEqual(HttpStatusCode.OK, response.StatusCode); var category = JsonConvert.DeserializeObject<CategoryWithExpense>(response.Content.ReadAsStringAsync().Result); Assert.AreEqual(1, category.CategoryId, "Got wrong number of Categories"); } [Test] public void Get_InValidCategoryId_Returns_NotFound() { // Arrange IEnumerable<CategoryWithExpense> fakeCategories = GetCategories(); categoryRepository.Setup(x => x.GetCategoryWithExpenses()).Returns(fakeCategories); CategoryController controller = new CategoryController(commandBus.Object, categoryRepository.Object) { Request = new HttpRequestMessage() { Properties = { { HttpPropertyKeys.HttpConfigurationKey, new HttpConfiguration() } } } }; // Act var response = controller.Get(5); // Assert Assert.AreEqual(HttpStatusCode.NotFound, response.StatusCode); } [Test] public void Post_Category_Returns_CreatedStatusCode() { // Arrange commandBus.Setup(c => c.Submit(It.IsAny<CreateOrUpdateCategoryCommand>())).Returns(new CommandResult(true)); Mapper.CreateMap<CategoryFormModel, CreateOrUpdateCategoryCommand>(); var httpConfiguration = new HttpConfiguration(); WebApiConfig.Register(httpConfiguration); var httpRouteData = new HttpRouteData(httpConfiguration.Routes["DefaultApi"], new HttpRouteValueDictionary { { "controller", "category" } }); var controller = new CategoryController(commandBus.Object, categoryRepository.Object) { Request = new HttpRequestMessage(HttpMethod.Post, "http://localhost/api/category/") { Properties = { { HttpPropertyKeys.HttpConfigurationKey, httpConfiguration }, { HttpPropertyKeys.HttpRouteDataKey, httpRouteData } } } }; // Act CategoryModel category = new CategoryModel(); category.CategoryId = 1; category.CategoryName = "Mock Category"; var response = controller.Post(category); // Assert Assert.AreEqual(HttpStatusCode.Created, response.StatusCode); var newCategory = JsonConvert.DeserializeObject<CategoryModel>(response.Content.ReadAsStringAsync().Result); Assert.AreEqual(string.Format("http://localhost/api/category/{0}", newCategory.CategoryId), response.Headers.Location.ToString()); } [Test] public void Post_EmptyCategory_Returns_BadRequestStatusCode() { // Arrange commandBus.Setup(c => c.Submit(It.IsAny<CreateOrUpdateCategoryCommand>())).Returns(new CommandResult(true)); Mapper.CreateMap<CategoryFormModel, CreateOrUpdateCategoryCommand>(); var httpConfiguration = new HttpConfiguration(); WebApiConfig.Register(httpConfiguration); var httpRouteData = new HttpRouteData(httpConfiguration.Routes["DefaultApi"], new HttpRouteValueDictionary { { "controller", "category" } }); var controller = new CategoryController(commandBus.Object, categoryRepository.Object) { Request = new HttpRequestMessage(HttpMethod.Post, "http://localhost/api/category/") { Properties = { { HttpPropertyKeys.HttpConfigurationKey, httpConfiguration }, { HttpPropertyKeys.HttpRouteDataKey, httpRouteData } } } }; // Act CategoryModel category = new CategoryModel(); category.CategoryId = 0; category.CategoryName = ""; // The ASP.NET pipeline doesn't run, so validation don't run. controller.ModelState.AddModelError("", "mock error message"); var response = controller.Post(category); // Assert Assert.AreEqual(HttpStatusCode.BadRequest, response.StatusCode); } [Test] public void Put_Category_Returns_OKStatusCode() { // Arrange commandBus.Setup(c => c.Submit(It.IsAny<CreateOrUpdateCategoryCommand>())).Returns(new CommandResult(true)); Mapper.CreateMap<CategoryFormModel, CreateOrUpdateCategoryCommand>(); CategoryController controller = new CategoryController(commandBus.Object, categoryRepository.Object) { Request = new HttpRequestMessage() { Properties = { { HttpPropertyKeys.HttpConfigurationKey, new HttpConfiguration() } } } }; // Act CategoryModel category = new CategoryModel(); category.CategoryId = 1; category.CategoryName = "Mock Category"; var response = controller.Put(category.CategoryId,category); // Assert Assert.AreEqual(HttpStatusCode.OK, response.StatusCode); } [Test] public void Delete_Category_Returns_NoContentStatusCode() { // Arrange commandBus.Setup(c => c.Submit(It.IsAny<DeleteCategoryCommand >())).Returns(new CommandResult(true)); CategoryController controller = new CategoryController(commandBus.Object, categoryRepository.Object) { Request = new HttpRequestMessage() { Properties = { { HttpPropertyKeys.HttpConfigurationKey, new HttpConfiguration() } } } }; // Act var response = controller.Delete(1); // Assert Assert.AreEqual(HttpStatusCode.NoContent, response.StatusCode); } private static IEnumerable<CategoryWithExpense> GetCategories() { IEnumerable<CategoryWithExpense> fakeCategories = new List<CategoryWithExpense> { new CategoryWithExpense {CategoryId=1, CategoryName = "Test1", Description="Test1Desc", TotalExpenses=1000}, new CategoryWithExpense {CategoryId=2, CategoryName = "Test2", Description="Test2Desc",TotalExpenses=2000}, new CategoryWithExpense { CategoryId=3, CategoryName = "Test3", Description="Test3Desc",TotalExpenses=3000} }.AsEnumerable(); return fakeCategories; } } The complete implementation for the Api Controller, CategoryController is given below: public class CategoryController : ApiController { private readonly ICommandBus commandBus; private readonly ICategoryRepository categoryRepository; public CategoryController(ICommandBus commandBus, ICategoryRepository categoryRepository) { this.commandBus = commandBus; this.categoryRepository = categoryRepository; } public IQueryable<CategoryWithExpense> Get() { var categories = categoryRepository.GetCategoryWithExpenses().AsQueryable(); return categories; } // GET /api/category/5 public HttpResponseMessage Get(int id) { var category = categoryRepository.GetCategoryWithExpenses().Where(c => c.CategoryId == id).SingleOrDefault(); if (category == null) { return Request.CreateResponse(HttpStatusCode.NotFound); } return Request.CreateResponse(HttpStatusCode.OK, category); } // POST /api/category public HttpResponseMessage Post(CategoryModel category) { if (ModelState.IsValid) { var command = new CreateOrUpdateCategoryCommand(category.CategoryId, category.CategoryName, category.Description); var result = commandBus.Submit(command); if (result.Success) { var response = Request.CreateResponse(HttpStatusCode.Created, category); string uri = Url.Link("DefaultApi", new { id = category.CategoryId }); response.Headers.Location = new Uri(uri); return response; } } else { return Request.CreateErrorResponse(HttpStatusCode.BadRequest, ModelState); } throw new HttpResponseException(HttpStatusCode.BadRequest); } // PUT /api/category/5 public HttpResponseMessage Put(int id, CategoryModel category) { if (ModelState.IsValid) { var command = new CreateOrUpdateCategoryCommand(category.CategoryId, category.CategoryName, category.Description); var result = commandBus.Submit(command); return Request.CreateResponse(HttpStatusCode.OK, category); } else { return Request.CreateErrorResponse(HttpStatusCode.BadRequest, ModelState); } throw new HttpResponseException(HttpStatusCode.BadRequest); } // DELETE /api/category/5 public HttpResponseMessage Delete(int id) { var command = new DeleteCategoryCommand { CategoryId = id }; var result = commandBus.Submit(command); if (result.Success) { return new HttpResponseMessage(HttpStatusCode.NoContent); } throw new HttpResponseException(HttpStatusCode.BadRequest); } } Source Code The EFMVC app can download from http://efmvc.codeplex.com/ . The unit test project can be found from the project EFMVC.Tests and Web API project can be found from EFMVC.Web.API.

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Database model for keeping track of likes/shares/comments on blog posts over time

- by gage

My goal is to keep track of the popular posts on different blog sites based on social network activity at any given time. The goal is not to simply get the most popular now, but instead find posts that are popular compared to other posts on the same blog. For example, I follow a tech blog, a sports blog, and a gossip blog. The tech blog gets waaay more readership than the other two blogs, so in raw numbers every post on the tech blog will always out number views on the other two. So lets say the average tech blog post gets 500 facebook likes and the other two get an average of 50 likes per post. Then when there is a sports blog post that has 200 fb likes and a gossip blog post with 300 while the tech blog posts today have 500 likes I want to highlight the sports and gossip blog posts (more likes than average vs tech blog with more # of likes but just average for the blog) The approach I am thinking of taking is to make an entry in a database for each blog post. Every x minutes (say every 15 minutes) I will check how many likes/shares/comments an entry has received on all the social networks (facebook, twitter, google+, linkeIn). So over time there will be a history of likes for each blog post, i.e post 1234 after 15 min: 10 fb likes, 4 tweets, 6 g+ after 30 min: 15 fb likes, 15 tweets, 10 g+ ... ... after 48 hours: 200 fb likes, 25 tweets, 15 g+ By keeping a history like this for each blog post I can know the average number of likes/shares/tweets at any give time interval. So for example the average number of fb likes for all blog posts 48hrs after posting is 50, and a particular post has 200 I can mark that as a popular post and feature/highlight it. A consideration in the design is to be able to easily query the values (likes/shares) for a specific time-frame, i.e. fb likes after 30min or tweets after 24 hrs in-order to compute averages with which to compare against (or should averages be stored in it's own table?) If this approach is flawed or could use improvement please let me know, but it is not my main question. My main question is what should a database scheme for storing this info look like? Assuming that the above approach is taken I am trying to figure out what a database schema for storing the likes over time would look like. I am brand new to databases, in doing some basic reading I see that it is advisable to make a 3NF database. I have come up with the following possible schema. Schema 1 DB Popular Posts Table: Post post_id ( primary key(pk) ) url title Table: Social Activity activity_id (pk) url (fk) type (i.e. facebook,twitter,g+) value timestamp This was my initial instinct (base on my very limited db knowledge). As far as I under stand this schema would be 3NF? I searched for designs of similar database model, and found this question on stackoverflow, http://stackoverflow.com/questions/11216080/data-structure-for-storing-height-and-weight-etc-over-time-for-multiple-users . The scenario in that question is similar (recording weight/height of users overtime). Taking the accepted answer for that question and applying it to my model results in something like: Schema 2 (same as above, but break down the social activity into 2 tables) DB Popular Posts Table: Post post_id (pk) url title Table: Social Measurement measurement_id (pk) post_id (fk) timestamp Table: Social stat stat_id (pk) measurement_id (fk) type (i.e. facebook,twitter,g+) value The advantage I see in schema 2 is that I will likely want to access all the values for a given time, i.e. when making a measurement at 30min after a post is published I will simultaneous check number of fb likes, fb shares, fb comments, tweets, g+, linkedIn. So with this schema it may be easier get get all stats for a measurement_id corresponding to a certain time, i.e. all social stats for post 1234 at time x. Another thought I had is since it doesn't make sense to compare number of fb likes with number of tweets or g+ shares, maybe it makes sense to separate each social measurement into it's own table? Schema 3 DB Popular Posts Table: Post post_id (pk) url title Table: fb_likes fb_like_id (pk) post_id (fk) timestamp value Table: fb_shares fb_shares_id (pk) post_id (fk) timestamp value Table: tweets tweets__id (pk) post_id (fk) timestamp value Table: google_plus google_plus_id (pk) post_id (fk) timestamp value As you can see I am generally lost/unsure of what approach to take. I'm sure this typical type of database problem (storing measurements overtime, i.e temperature statistic) that must have a common solution. Is there a design pattern/model for this, does it have a name? I tried searching for "database periodic data collection" or "database measurements over time" but didn't find anything specific. What would be an appropriate model to solve the needs of this problem?

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Guest Post: Using IronRuby and .NET to produce the ‘Hello World of WPF’

- by Eric Nelson

[You might want to also read other GuestPosts on my blog – or contribute one?] On the 26th and 27th of March (2010) myself and Edd Morgan of Microsoft will be popping along to the Scottish Ruby Conference. I dabble with Ruby and I am a huge fan whilst Edd is a “proper Ruby developer”. Hence I asked Edd if he was interested in creating a guest post or two for my blog on IronRuby. This is the second of those posts. If you should stumble across this post and happen to be attending the Scottish Ruby Conference, then please do keep a look out for myself and Edd. We would both love to chat about all things Ruby and IronRuby. And… we should have (if Amazon is kind) a few books on IronRuby with us at the conference which will need to find a good home. This is me and Edd and … the book: Order on Amazon: http://bit.ly/ironrubyunleashed Using IronRuby and .NET to produce the ‘Hello World of WPF’ In my previous post I introduced, to a minor extent, IronRuby. I expanded a little on the basics of by getting a Rails app up-and-running on this .NET implementation of the Ruby language — but there wasn't much to it! So now I would like to go from simply running a pre-existing project under IronRuby to developing a whole new application demonstrating the seamless interoperability between IronRuby and .NET. In particular, we'll be using WPF (Windows Presentation Foundation) — the component of the .NET Framework stack used to create rich media and graphical interfaces. Foundations of WPF To reiterate, WPF is the engine in the .NET Framework responsible for rendering rich user interfaces and other media. It's not the only collection of libraries in the framework with the power to do this — Windows Forms does the trick, too — but it is the most powerful and flexible. Put simply, WPF really excels when you need to employ eye candy. It's all about creating impact. Whether you're presenting a document, video, a data entry form, some kind of data visualisation (which I am most hopeful for, especially in terms of IronRuby - more on that later) or chaining all of the above with some flashy animations, you're likely to find that WPF gives you the most power when developing any of these for a Windows target. Let's demonstrate this with an example. I give you what I like to consider the 'hello, world' of WPF applications: the analogue clock. Today, over my lunch break, I created a WPF-based analogue clock using IronRuby... Any normal person would have just looked at their watch. - Twitter The Sample Application: Click here to see this sample in full on GitHub. Using Windows Presentation Foundation from IronRuby to create a Clock class Invoking the Clock class Gives you The above is by no means perfect (it was a lunch break), but I think it does the job of illustrating IronRuby's interoperability with WPF using a familiar data visualisation. I'm sure you'll want to dissect the code yourself, but allow me to step through the important bits. (By the way, feel free to run this through ir first to see what actually happens). Now we're using IronRuby - unlike my previous post where we took pure Ruby code and ran it through ir, the IronRuby interpreter, to demonstrate compatibility. The main thing of note is the very distinct parallels between .NET namespaces and Ruby modules, .NET classes and Ruby classes. I guess there's not much to say about it other than at this point, you may as well be working with a purely Ruby graphics-drawing library. You're instantiating .NET objects, but you're doing it with the standard Ruby .new method you know from Ruby as Object#new — although, the root object of all your IronRuby objects isn't actually Object, it's System.Object. You're calling methods on these objects (and classes, for example in the call to System.Windows.Controls.Canvas.SetZIndex()) using the underscored, lowercase convention established for the Ruby language. The integration is so seamless. The fact that you're using a dynamic language on top of .NET's CLR is completely abstracted from you, allowing you to just build your software. A Brief Note on Events Events are a big part of developing client applications in .NET as well as under every other environment I can think of. In case you aren't aware, event-driven programming is essentially the practice of telling your code to call a particular method, or other chunk of code (a delegate) when something happens at an unpredictable time. You can never predict when a user is going to click a button, move their mouse or perform any other kind of input, so the advent of the GUI is what necessitated event-driven programming. This is where one of my favourite aspects of the Ruby language, blocks, can really help us. In traditional C#, for instance, you may subscribe to an event (assign a block of code to execute when an event occurs) in one of two ways: by passing a reference to a named method, or by providing an anonymous code block. You'd be right for seeing the parallel here with Ruby's concept of blocks, Procs and lambdas. As demonstrated at the very end of this rather basic script, we are using .NET's System.Timers.Timer to (attempt to) update the clock every second (I know it's probably not the best way of doing this, but for example's sake). Note: Diverting a little from what I said above, the ticking of a clock is very predictable, yet we still use the event our Timer throws to do this updating as one of many ways to perform that task outside of the main thread. You'll see that all that's needed to assign a block of code to be triggered on an event is to provide that block to the method of the name of the event as it is known to the CLR. This drawback to this is that it only allows the delegation of one code block to each event. You may use the add method to subscribe multiple handlers to that event - pushing that to the end of a queue. Like so: def tick puts "tick tock" end timer.elapsed.add method(:tick) timer.elapsed.add proc { puts "tick tock" } tick_handler = lambda { puts "tick tock" } timer.elapsed.add(tick_handler) The ability to just provide a block of code as an event handler helps IronRuby towards that very important term I keep throwing around; low ceremony. Anonymous methods are, of course, available in other more conventional .NET languages such as C# and VB but, as usual, feel ever so much more elegant and natural in IronRuby. Note: Whether it's a named method or an anonymous chunk o' code, the block you delegate to the handling of an event can take arguments - commonly, a sender object and some args. Another Brief Note on Verbosity Personally, I don't mind verbose chaining of references in my code as long as it doesn't interfere with performance - as evidenced in the example above. While I love clean code, there's a certain feeling of safety that comes with the terse explicitness of long-winded addressing and the describing of objects as opposed to ambiguity (not unlike this sentence). However, when working with IronRuby, even I grow tired of typing System::Whatever::Something. Some people enjoy simply assuming namespaces and forgetting about them, regardless of the language they're using. Don't worry, IronRuby has you covered. It is completely possible to, with a call to include, bring the contents of a .NET-converted module into context of your IronRuby code - just as you would if you wanted to bring in an 'organic' Ruby module. To refactor the style of the above example, I could place the following at the top of my Clock class: class Clock include System::Windows::Shape include System::Windows::Media include System::Windows::Threading # and so on... And by doing so, reduce calls to System::Windows::Shapes::Ellipse.new to simply Ellipse.new or references to System::Windows::Threading::DispatcherPriority.Render to a friendlier DispatcherPriority.Render. Conclusion I hope by now you can understand better how IronRuby interoperates with .NET and how you can harness the power of the .NET framework with the dynamic nature and elegant idioms of the Ruby language. The manner and parlance of Ruby that makes it a joy to work with sets of data is, of course, present in IronRuby — couple that with WPF's capability to produce great graphics quickly and easily, and I hope you can visualise the possibilities of data visualisation using these two things. Using IronRuby and WPF together to create visual representations of data and infographics is very exciting to me. Although today, with this project, we're only presenting one simple piece of information - the time - the potential is much grander. My day-to-day job is centred around software development and UI design, specifically in the realm of healthcare, and if you were to pay a visit to our office you would behold, directly above my desk, a large plasma TV with a constantly rotating, animated slideshow of charts and infographics to help members of our team do their jobs. It's an app powered by WPF which never fails to spark some conversation with visitors whose gaze has been hooked. If only it was written in IronRuby, the pleasantly low ceremony and reduced pre-processing time for my brain would have helped greatly. Edd Morgan blog Related Links: Getting PhP and Ruby working on Windows Azure and SQL Azure

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How to post JSON object to a URL without cURL in PHP? [closed]

- by empyreanphoenix

I have written a send sms code which uses an available sms api. So, I need to post a string in the json(string in $json) format to a url(url specified in $url var), but I am getting the following error String index out of range: -1 I understand that the error arises when requesting for an index that isn't there, but I dont find how that applies in this case. Please help. Note: name1,name2 and name3 are sender name, phone number and content respectively. Thanks array ( 'method' = 'POST', 'content' = $data, 'header' ="Authentication:$key" . "timeout:50000"."ContentLength: " . strlen ( $data) . "\r\n" ) ); if ($optional_headers != null) { $params ['http'] ['header'] = $optional_headers; } $ctx = stream_context_create ( $params ); try { $fp = fopen ( $url, 'rb', false, $ctx ); $response = stream_get_contents ( $fp ); echo "response"; } catch ( Exception $e ) { echo 'Exception: ' . $e-getMessage (); echo "caught"; } echo "done"; return $response; }

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How to add custom fields in WordPress "Add a New Post" page?

- by KPL

Hello awesome people, I want to add a custom field on Add A New Post page. Like - if I am to make a plugin which will post links to Twitter after a new post is made, I would like to give ability to user to select if he wants to tweet that particular post's link to Twitter. I want to display a check box somewhere in the page which says - "Post this on Twitter" and then check for it and make a tweet. I have seen some plugins which do this. But can't remember which they were. Can someone please help me out?

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Does jQuery ajaxSetup method not work with $.get or $.post?

- by Justin Poliey

Does the jQuery $.ajaxSetup method not respect the data field in the options hash when $.post or $.get is called? For example, I might have this code: $.ajaxSetup({ data: { persist: true } }); Then, to send a POST request, I would call this: $.post("/create/something", { name: "foo" }); I was expecting the actual POST data to look like this: { persist: true, name: "foo" } but the only data sent by $.post is { name: "foo" }. Is there any way to get the expected behavior? I'm using jQuery 1.4.1.

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How to make WordPress "Add/Edit Post" form more Tumblr like?

- by Eliot Sykes

Hi, WordPress requires you give each blog post at least two fields: a title and text body content. I'm wondering how to modify WordPress admin so I can sometimes enter a single field for a blog post, in particular a URL, without WordPress requiring a title (related but not the point of this question: a custom theme would then know how to handle a post that only contained a URL, it would treat it like a "Link" post in Tumblr). Ideally it'd be good if the "add/edit post" form could be modified so it only contains this single URL/Link field when this is wanted. I'm guessing this is possible through a plugin but I'm not certain. I'm hoping some smart WordPress devs are here to share and brainstorm ideas for how this could be done. Thanks in advance for any help, Eliot

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Global Temporary Table "On commit delete rows" functionality discrepancy.

- by TomatoSandwich

I have a global temporary table. I called my GTT, for that was it's initials. My GTT never hurt anyone, and did everything I bade of it. I asked my GTT to delete rows on commit. This is a valid function in the creation script of my GTT in oracle. I wanted to be able to have different users see GTT with their own data, and not the data of other people's sessions. 'Delete rows on commit' worked perfectly in our test environment. GTT and I were happy. But then, I deployed GTT as part of an update to functionality to a client's database. The database doesn't like to play well with GTT. GTT called me up all upset and worried, because it wasn't holding any data any more, and didn't know why. GTT told me that if someone did: insert into my_GTT (description) values ('Happy happy joy joy') he would sing-song back: 1 row inserted. However, if the same person tried select * from my_GTT; GTT didn't know what to do, and he replied 0 rows returned. GTT was upset that he didn't know what his playmate had inserted. Please, Stackoverflow, why would GTT forget what was placed into him? He can remember perfectly well at home, but out in the cold harsh world, he just gets so scared. :(

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Can a Snapshot transaction fail and only partially commit in a TransactionScope?

- by Travis Brooks

Greetings I stumbled onto a problem today that seems sort of impossible to me, but its happening...I'm calling some database code in c# that looks something like this: using(var tran = MyDataLayer.Transaction()) { MyDataLayer.ExecSproc(new SprocTheFirst(arg1, arg2)); MyDataLayer.CallSomethingThatEventuallyDoesLinqToSql(arg1, argEtc); tran.Commit(); } I've simplified this a bit for posting, but whats going on is MyDataLayer.Transaction() makes a TransactionScope with the IsolationLevel set to Snapshot and TransactionScopeOption set to Required. This code gets called hundreds of times a day, and almost always works perfectly. However after reviewing some data I discovered there are a handful of records created by "SprocTheFirst" but no corresponding data from "CallSomethingThatEventuallyDoesLinqToSql". The only way that records should exist in the tables I'm looking at is from SprocTheFirst, and its only ever called in this one function, so if its called and succeeded then I would expect CallSomethingThatEventuallyDoesLinqToSql would get called and succeed because its all in the same TransactionScope. Its theoretically possible that some other dev mucked around in the DB, but I don't think they have. We also log all exceptions, and I can find nothing unusual happening around the time that the records from SprocTheFirst were created. So, is it possible that a transaction, or more properly a declarative TransactionScope, with Snapshot isolation level can fail somehow and only partially commit?

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SQL SERVER – The Story of a Lesser Known Startup Parameter in SQL Server – Guest Post by Balmukund Lakhani

- by Pinal Dave

This is a fantastic blog post from my dear friend Balmukund ( blog | twitter | facebook ). He had presented a fantastic session in our last UG and there were lots of requests from attendees that he blogs about it. Well, here is the blog post about the same very popular UG session. Let us read the entire blog post in the voice of the Balmukund himself. During my last session in SQL Bangalore User Group (Facebook) meeting, I was lucky enough to deliver a session on SQL Server Startup issue. The name of the session was “SQL Engine Starting Trouble – How to start?” From the feedback, I realized that one of the “not well known” startup parameter is “-m”. Okay, you might say “I know that this is used to start the SQL in single user mode”. But what you might not know is that you can pass a string with -m which has special meaning and use. I have used this parameter in my blog here but looks like not many of you have seen that. It happens most of the time when we want to start SQL Server in single user mode, someone else makes connection before you can. The only choice you have is to repeat same process again till you succeed. Some smart DBAs may disable the remote network protocols (TCP/IP and Named Pipes) of SQL Instance and allow only local connections to SQL. Once the activity is complete, our dear smart DBA has to remember to re-enable network protocols. Sometimes, it may be a local service or application getting connection to SQL before we can. There is a better way to deal with it. Yes, you have guessed it correctly: -m parameter which a string. Since I work with SQL Product Support team, I may know little more undocumented commands and parameters, but this is not an undocumented stuff. It’s already documented in books online. So in this blog, I am going to show a demo of its usage. As documentation shows, “Do not use this option as a security feature.” So please read this blog as knowledge enhancer and troubleshooting issues not security feature. In my laptop, I have a default instance of SQL Server 2012 and here is what we would in the configuration manager. Now, I would go ahead and stop SQL Service by selecting SQL Server (MSSQLServer) > Right Click > Stop. There are multiple ways to start SQL with startup parameter. 1) Use Net Start Command from command prompt Net Start MSSQLServer /mSQLCMD The above command is the simplest way to add startup parameter to SQL. This parameter would be cleared once we stop and start SQL. 2) Add Startup Parameter via configuration manager. Step is already listed here. We need to add -mSQLCMD If we compare 1 and 2, it’s clear that unless we modify startup parameter and remove -m, it would be in effect. 3) Start SQL Service via command line SQLServr.exe –mSQLCMD –s<InstanceName> Wait, what does SQLCMD mean with /m? It’s the instruction to SQL that start SQL Server in Single User Mode and allow only the application which is SQLCMD. Any other application would fail with Login Failed for User Error message. It would be important to note that string is case sensitive. This value should be picked up from application_name column from sys.dm_exec_sessions. I have made a connection using SQLCMD and as we can see it comes as upper case “SQLCMD”. If we want only management studio query windows to connect then we need to give -m” Microsoft SQL Server Management Studio – Query” as startup parameter. In below example, I have given it as SQLCMd (lower case d at the end) and we would notice that we would not be able to connect to SQL Instance. Above proves that parameter works as expected and it’s case sensitive. Error Log would show below information. How to get error log location? I have already blogged about it. Hope you have learned something new. Reference: Pinal Dave (http://blog.sqlauthority.com) Filed under: PostADay, SQL, SQL Authority, SQL Query, SQL Server, SQL Server Management Studio, SQL Tips and Tricks, T SQL, Technology

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Error while validating HTML "document type does not allow element "li" here; missing one of "ul", "o

- by brumila

Hey! So I'm trying to code something on wordpress for the first time but the validator doesn't seem to like me. Look at the error I got while validating: Line 87, Column 33: document type does not allow element "li" here; missing one of "ul", "ol", "menu", "dir" start-tag I've searched everywhere, I'm not aware of any missing or misplaced li or ul tags can someone help me out on this one? <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head profile="http://gmpg.org/xfn/11"> <title> Blog</title> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> <meta name="generator" content="WordPress 2.9.2" />  <link rel="stylesheet" href="http://localhost/wordpress/wp-content/themes/cmc-milagro/style.css" type="text/css" media="screen" /> <link rel="alternate" type="application/rss+xml" title="RSS 2.0" href="http://localhost/wordpress/?feed=rss2" /> <link rel="alternate" type="text/xml" title="RSS .92" href="http://localhost/wordpress/?feed=rss" /> <link rel="alternate" type="application/atom+xml" title="Atom 0.3" href="http://localhost/wordpress/?feed=atom" /> <link rel="pingback" href="http://localhost/wordpress/xmlrpc.php" /> <link rel='archives' title='March 2010' href='http://localhost/wordpress/?m=201003' /> <link rel="EditURI" type="application/rsd+xml" title="RSD" href="http://localhost/wordpress/xmlrpc.php?rsd" /> <link rel="wlwmanifest" type="application/wlwmanifest+xml" href="http://localhost/wordpress/wp-includes/wlwmanifest.xml" /> <link rel='index' title='Blog' href='http://localhost/wordpress' /> <meta name="generator" content="WordPress 2.9.2" /> </head> <body> <div> <h1><a href="http://localhost/wordpress"> Blog</a> </h1> Just another WordPress weblog</div> <div id="container"> <h2><a href="http://localhost/wordpress/?p=8"> Teste Post 3 </a></h2> <div class="post" id="post-8"> <div class="entry"> <p>Aliquam erat volutpat. Fusce in nibh elit. Morbi lorem urna, viverra sed blandit eget, mattis venenatis felis. Maecenas viverra pellentesque justo, vel tincidunt massa semper sit amet. Vestibulum rhoncus purus in mauris fermentum ut aliquet augue semper.</p> <p class="postmetadata"> Filed under: <a href="http://localhost/wordpress/?cat=1" title="View all posts in Uncategorized" rel="category">Uncategorized</a> by admin <br /> <a href="http://localhost/wordpress/?p=8#respond" title="Comment on Teste Post 3">No Comments »</a> | <a class="post-edit-link" href="http://localhost/wordpress/wp-admin/post.php?action=edit&post=8" title="Edit post">Edit</a> </p> </div> </div> <h2><a href="http://localhost/wordpress/?p=5"> Teste Post 2 </a></h2> <div class="post" id="post-5"> <div class="entry"> <p>Aliquam erat volutpat. Fusce in nibh elit. Morbi lorem urna, viverra sed blandit eget, mattis venenatis felis. Maecenas viverra pellentesque justo, vel tincidunt massa semper sit amet. Vestibulum rhoncus purus in mauris fermentum ut aliquet augue semper. Duis orci metus, cursus ac tempor eget, faucibus vel elit. Sed rutrum mollis posuere. Maecenas luctus commodo augue vel fringilla. Nunc enim lacus, varius nec tempor sed, congue vel elit. Suspendisse urna ligula, pharetra ac malesuada quis, scelerisque eget justo.</p> <p class="postmetadata"> Filed under: <a href="http://localhost/wordpress/?cat=1" title="View all posts in Uncategorized" rel="category">Uncategorized</a> by admin <br /> <a href="http://localhost/wordpress/?p=5#respond" title="Comment on Teste Post 2">No Comments »</a> | <a class="post-edit-link" href="http://localhost/wordpress/wp-admin/post.php?action=edit&post=5" title="Edit post">Edit</a> </p> </div> </div> <h2><a href="http://localhost/wordpress/?p=3"> Teste Post 1 </a></h2> <div class="post" id="post-3"> <div class="entry"> <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Etiam ut mattis elit. In sed nulla lobortis dolor pellentesque fringilla at eget ipsum. Proin pellentesque vehicula ultricies. Phasellus velit nunc, tempus nec scelerisque vel, euismod pellentesque diam. Vivamus consectetur, sapien sit amet rhoncus porta, sapien nisl imperdiet diam, dapibus placerat sem ante condimentum nisl. Nulla facilisi. Mauris eu turpis mauris. Nunc at turpis elit, et mattis purus. Proin varius, nunc rhoncus consectetur dignissim, lacus augue accumsan sem, nec pretium magna est a massa. Duis eu justo arcu. Curabitur diam ligula, semper non blandit ut, sodales ac dui.</p> <p class="postmetadata"> Filed under: <a href="http://localhost/wordpress/?cat=1" title="View all posts in Uncategorized" rel="category">Uncategorized</a> by admin <br /> <a href="http://localhost/wordpress/?p=3#respond" title="Comment on Teste Post 1">No Comments »</a> | <a class="post-edit-link" href="http://localhost/wordpress/wp-admin/post.php?action=edit&post=3" title="Edit post">Edit</a> </p> </div> </div> <h2><a href="http://localhost/wordpress/?p=1"> Hello world! </a></h2> <div class="post" id="post-1"> <div class="entry"> <p>Welcome to WordPress. This is your first post. Edit or delete it, then start blogging!</p> <p class="postmetadata"> Filed under: <a href="http://localhost/wordpress/?cat=1" title="View all posts in Uncategorized" rel="category">Uncategorized</a> by admin <br /> <a href="http://localhost/wordpress/?p=1#comments" title="Comment on Hello world!">1 Comment »</a> | <a class="post-edit-link" href="http://localhost/wordpress/wp-admin/post.php?action=edit&post=1" title="Edit post">Edit</a> </p> </div> </div> <div class="navigation"> </div> </div> <div class="sidebar"> <ul> <li id="search"> <form method="get" id="searchform" action="http://localhost/wordpress/"> <div> <input type="text" value="" name="s" id="s" size="15" /><br /> <input type="submit" id="searchsubmit" value="Search" /> </div> </form> <li class="pagenav"><h2>Pages</h2><ul><li class="page_item page-item-2"><a href="http://localhost/wordpress/?page_id=2" title="About">About</a></li> </ul></li> </li> <li> <h2> Categories </h2> <ul> <li class="cat-item cat-item-1"><a href="http://localhost/wordpress/?cat=1" title="View all posts filed under Uncategorized">Uncategorized</a> (4) </li> </ul> </li> <li> <h2> Archives </h2> <ul> <li><a href='http://localhost/wordpress/?m=201003' title='March 2010'>March 2010</a></li> </ul> </li> <li id="linkcat-2" class="linkcat"><h2>Blogroll</h2> <ul> <li><a href="http://wordpress.org/development/">Development Blog</a></li> <li><a href="http://codex.wordpress.org/">Documentation</a></li> <li><a href="http://wordpress.org/extend/plugins/">Plugins</a></li> <li><a href="http://wordpress.org/extend/ideas/">Suggest Ideas</a></li> <li><a href="http://wordpress.org/support/">Support Forum</a></li> <li><a href="http://wordpress.org/extend/themes/">Themes</a></li> <li><a href="http://planet.wordpress.org/">WordPress Planet</a></li> </ul> </li> <li> <h2> Meta </h2> <ul> <li><a href="http://localhost/wordpress/wp-admin/">Site Admin</a></li> <li> <a href="http://localhost/wordpress/wp-login.php?action=logout&_wpnonce=ee45c3c988">Log out</a> </li> </ul> </li> </ul> </div> <div id="footer"> <p> Copyright © 2010 Blog</p> </div> </body> </html>

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jqGrid (Delete row) - How to send additional POST data???

- by ronanray

Hi experts, I'm having problem with jqGrid delete mechanism as it only send "oper" and "id" parameters in form of POST data (id is the primary key of the table). The problem is, I need to delete a row based on the id and another column value, let's say user_id. How to add this user_id to the POST data??? I can summarize the issue as the following: How to get the cell value (user_id) of the selected row? AND, how to add that user_id to the POST data so it can be retrieved from the code behind where the actual delete process takes place. Sample codes: jQuery("#tags").jqGrid({ url: "subgrid.process.php, editurl: "subgrid.process.php?, datatype: "json", mtype: "POST", colNames:['id','user_id','status_type_id'], colModel:[{name:'id', index:'id', width:100, editable:true}, {name:'user_id', index:'user_id', width:200, editable:true}, {name:'status_type_id', index:'status_type_id', width:200} ], pager: '#pagernav2', rowNum:10, rowList:[10,20,30,40,50,100], sortname: 'id', sortorder: "asc", caption: "Test", height: 200 }); jQuery("#tags").jqGrid('navGrid','#pagernav2', {add:true,edit:false,del:true,search:false}, {}, {mtype:"POST",closeAfterAdd:true,reloadAfterSubmit:true}, // add options {mtype:"POST",reloadAfterSubmit:true}, // del options {} // search options ); Help....

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How would I send a POST Request via Ajax?

- by Gotactics

I have a php page, Post.php it recieves the POST's Action, and that has two functions. Insert, and Update.Now how would I go about posting INSERT with this Ajax code. The code posts update fine but is doesnt post insert at all. $(document).ready(function(){ //global vars var inputUser = $("#nick"); var inputMessage = $("#message"); var loading = $("#loading"); var messageList = $(".content ul"); //functions function updateShoutbox(){ //just for the fade effect messageList.hide(); loading.fadeIn(); //send the post to shoutbox.php $.ajax({ type: "POST", url: "Shoutbox.php", data: "action=update", complete: function(data){ loading.fadeOut(); messageList.html(data.responseText); messageList.fadeIn(2000); } }); } //check if all fields are filled function checkForm(){ if(inputUser.attr("value") && inputMessage.attr("value")) return true; else return false; } //Load for the first time the shoutbox data updateShoutbox(); //on submit event $("#form").submit(function(){ if(checkForm()){ var nick = inputUser.attr("value"); var message = inputMessage.attr("value"); //we deactivate submit button while sending $("#send").attr({ disabled:true, value:"Sending..." }); $("#send").blur(); //send the post to shoutbox.php $.ajax({ type: "GET", url: "Shoutbox.php", data: "action=insert&nick=" + nick + "&message=" + message, complete: function(data){ messageList.html(data.responseText); updateShoutbox(); //reactivate the send button $("#send").attr({ disabled:false, value:"Shout it!" }); } }); } else alert("Please fill all fields!"); //we prevent the refresh of the page after submitting the form return false; }); });emphasized text

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Custom Wordpress Post Page Breaks if More Thank 2 Posts?

- by thatryan

I have a very custom template, and it works great if there are 1 or 2 posts on the blog page. But as soon as a 3rd post is added, it alters the structure of the template... Literally moves a div inside of another and I can not understand why. The code for the blog template is here, and a screenshot of the structure as it should be and another showing the misplaced div when a third post is there. Does this make any sense, any ideas? Thank you much! <div class="post" id="post-<?php the_ID(); ?>"> <h2><?php the_title(); ?></h2> <div id="main_full" class=" clearfix"> <div id="top_bar"><h3 class="gallery-title">news</h3></div> <div id="blog_page"> <div class="entry"> <?php the_content(); ?> </div> </div> </div> <?php endwhile; endif; ?> </div> <?php edit_post_link('Edit this entry.', '<p>', '</p>'); ?> <?php comments_template(); ?> Good One Bad One

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How to rebase onto a private branch with conflicts in gerrit/git?

- by edwardmlyte

Aim: I want to rebase commit G from "bravo", onto commit F from "alpha". From this: G bravo / D--E--F alpha / A--B--C mainline To this: G bravo / D--E--F alpha / A--B--C mainline "alpha" has been successfully rebased onto the latest mainline work. I cherry-pick "alpha" onto C. And when I cherry-pick "bravo", it comes up with all the merge conflicts. Once I fix those, if I do commit --amend The commit message just has all the information for alpha, whereas I'd expect the information for bravo. So I tried again after hard resetting to C, doing pull (as oppose to cherry-pick) for alpha and then pull bravo. Fixed the conflicts and just ran: commit The commit message just lists it as a merge and has merge information. Though the commit succeeds, I can't push this to gerrit as it says I don't have the rights to push merges. When I've read about rebase, it's always just to mainline, but I want to rebase private branches. Where am I going wrong?

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HTTP POST with URL query parameters -- good idea or not?

- by Steven Huwig

I'm designing an API to go over HTTP and I am wondering if using the HTTP POST command, but with URL query parameters only and no request body, is a good way to go. Considerations: "Good Web design" requires non-idempotent actions to be sent via POST. This is a non-idempotent action. It is easier to develop and debug this app when the request parameters are present in the URL. The API is not intended for widespread use. It seems like making a POST request with no body will take a bit more work, e.g. a Content-Length: 0 header must be explicitly added. It also seems to me that a POST with no body is a bit counter to most developer's and HTTP frameworks' expectations. Are there any more pitfalls or advantages to sending parameters on a POST request via the URL query rather than the request body? Edit: The reason this is under consideration is that the operations are not idempotent and have side effects other than retrieval. See the HTTP spec: In particular, the convention has been established that the GET and HEAD methods SHOULD NOT have the significance of taking an action other than retrieval. These methods ought to be considered "safe". This allows user agents to represent other methods, such as POST, PUT and DELETE, in a special way, so that the user is made aware of the fact that a possibly unsafe action is being requested. ... Methods can also have the property of "idempotence" in that (aside from error or expiration issues) the side-effects of N 0 identical requests is the same as for a single request. The methods GET, HEAD, PUT and DELETE share this property. Also, the methods OPTIONS and TRACE SHOULD NOT have side effects, and so are inherently idempotent.

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git destroyed my changes

- by mare

I made a commit of my repository a week ago but never actually pushed it to the remote at github, which I did today. However, in the time from my commit I made many changes to the source. But just the initial commit was pushed to remote and while doing it, it also overwrote my local files. What can I do to get back my current files?? For better understanding, this is what I've done: Created new VS project and created a new git repository in it, Performed an initial scan, stage and commit but without adding a remote and performing a push, Worked on files for a week, (Today) Forgot to perform rescan, new stage and commit and just created new GitHub repository and performed this: git remote add origin [email protected]:myaccount/webshop.git git push origin master Now the files in GitHub repository are the ones from inital commit and those were also copied over my current files, so I'm in the initial commit stage now locally too, which is awful. Help appreciated

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JPA entity relations are not populated after .persist()

- by Tomik

Hello, this is a sample of my two entities: @Entity public class Post implements Serializable { @OneToMany(mappedBy = "post", fetch = javax.persistence.FetchType.EAGER) @OrderBy("revision DESC") public List<PostRevision> revisions; @Entity(name="post_revision") public class PostRevision implements Serializable { @ManyToOne public Post post; private Integer revision; @PrePersist private void prePersist() { List<PostRevision> list = post.revisions; if(list.size() >= 1) revision = list.get(list.size() - 1).revision + 1; else revision = 1; } So, there's a "post" and it can have several revisions. During persisting of the revision, entity takes a look at the list of the existing revisions and finds the next revision number. Problem is that Post.revisions is NULL but I think it should be automatically populated. I guess there's some kind of problem in my source code but I don't know where. Here's my "persistence" code: Post post = new Post(); PostRevision revision = new PostRevision(); revision.post = post; em.persist(post); em.persist(revision); em.flush(); I think that after persisting "post", it becomes "managed" and all the relations should be populated from now on. Thanks for help! (Note: public attributes are just for demonstration)

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SQL SERVER – Thinking about Deprecated, Discontinued Features and Breaking Changes while Upgrading to SQL Server 2012 – Guest Post by Nakul Vachhrajani

- by pinaldave

Nakul Vachhrajani is a Technical Specialist and systems development professional with iGATE having a total IT experience of more than 7 years. Nakul is an active blogger with BeyondRelational.com (150+ blogs), and can also be found on forums at SQLServerCentral and BeyondRelational.com. Nakul has also been a guest columnist for SQLAuthority.com and SQLServerCentral.com. Nakul presented a webcast on the “Underappreciated Features of Microsoft SQL Server” at the Microsoft Virtual Tech Days Exclusive Webcast series (May 02-06, 2011) on May 06, 2011. He is also the author of a research paper on Database upgrade methodologies, which was published in a CSI journal, published nationwide. In addition to his passion about SQL Server, Nakul also contributes to the academia out of personal interest. He visits various colleges and universities as an external faculty to judge project activities being carried out by the students. Disclaimer: The opinions expressed herein are his own personal opinions and do not represent his employer’s view in anyway. Blog | LinkedIn | Twitter | Google+ Let us hear the thoughts of Nakul in first person - Those who have been following my blogs would be aware that I am recently running a series on the database engine features that have been deprecated in Microsoft SQL Server 2012. Based on the response that I have received, I was quite surprised to know that most of the audience found these to be breaking changes, when in fact, they were not! It was then that I decided to write a little piece on how to plan your database upgrade such that it works with the next version of Microsoft SQL Server. Please note that the recommendations made in this article are high-level markers and are intended to help you think over the specific steps that you would need to take to upgrade your database. Refer the documentation – Understand the terms Change is the only constant in this world. Therefore, whenever customer requirements, newer architectures and designs require software vendors to make a change to the keywords, functions, etc; they ensure that they provide their end users sufficient time to migrate over to the new standards before dropping off the old ones. Microsoft does that too with it’s Microsoft SQL Server product. Whenever a new SQL Server release is announced, it comes with a list of the following features: Breaking changes These are changes that would break your currently running applications, scripts or functionalities that are based on earlier version of Microsoft SQL Server These are mostly features whose behavior has been changed keeping in mind the newer architectures and designs Lesson: These are the changes that you need to be most worried about! Discontinued features These features are no longer available in the associated version of Microsoft SQL Server These features used to be “deprecated” in the prior release Lesson: Without these changes, your database would not be compliant/may not work with the version of Microsoft SQL Server under consideration Deprecated features These features are those that are still available in the current version of Microsoft SQL Server, but are scheduled for removal in a future version. These may be removed in either the next version or any other future version of Microsoft SQL Server The features listed for deprecation will compose the list of discontinued features in the next version of SQL Server Lesson: Plan to make necessary changes required to remove/replace usage of the deprecated features with the latest recommended replacements Once a feature appears on the list, it moves from bottom to the top, i.e. it is first marked as “Deprecated” and then “Discontinued”. We know of “Breaking change” comes later on in the product life cycle. What this means is that if you want to know what features would not work with SQL Server 2012 (and you are currently using SQL Server 2008 R2), you need to refer the list of breaking changes and discontinued features in SQL Server 2012. Use the tools! There are a lot of tools and technologies around us, but it is rarely that I find teams using these tools religiously and to the best of their potential. Below are the top two tools, from Microsoft, that I use every time I plan a database upgrade. The SQL Server Upgrade Advisor Ever since SQL Server 2005 was announced, Microsoft provides a small, very light-weight tool called the “SQL Server upgrade advisor”. The upgrade advisor analyzes installed components from earlier versions of SQL Server, and then generates a report that identifies issues to fix either before or after you upgrade. The analysis examines objects that can be accessed, such as scripts, stored procedures, triggers, and trace files. Upgrade Advisor cannot analyze desktop applications or encrypted stored procedures. Refer the links towards the end of the post to know how to get the Upgrade Advisor. The SQL Server Profiler Another great tool that you can use is the one most SQL Server developers & administrators use often – the SQL Server profiler. SQL Server Profiler provides functionality to monitor the “Deprecation” event, which contains: Deprecation announcement – equivalent to features to be deprecated in a future release of SQL Server Deprecation final support – equivalent to features to be deprecated in the next release of SQL Server You can learn more using the links towards the end of the post. A basic checklist There are a lot of finer points that need to be taken care of when upgrading your database. But, it would be worth-while to identify a few basic steps in order to make your database compliant with the next version of SQL Server: Monitor the current application workload (on a test bed) via the Profiler in order to identify usage of features marked as Deprecated If none appear, you are all set! (This almost never happens) Note down all the offending queries and feature usages Run analysis sessions using the SQL Server upgrade advisor on your database Based on the inputs from the analysis report and Profiler trace sessions, Incorporate solutions for the breaking changes first Next, incorporate solutions for the discontinued features Revisit and document the upgrade strategy for your deployment scenarios Revisit the fall-back, i.e. rollback strategies in case the upgrades fail Because some programming changes are dependent upon the SQL server version, this may need to be done in consultation with the development teams Before any other enhancements are incorporated by the development team, send out the database changes into QA QA strategy should involve a comparison between an environment running the old version of SQL Server against the new one Because minimal application changes have gone in (essential changes for SQL Server version compliance only), this would be possible As an ongoing activity, keep incorporating changes recommended as per the deprecated features list As a DBA, update your coding standards to ensure that the developers are using ANSI compliant code – this code will require a change only if the ANSI standard changes Remember this: Change management is a continuous process. Keep revisiting the product release notes and incorporate recommended changes to stay prepared for the next release of SQL Server. May the power of SQL Server be with you! Links Referenced in this post Breaking changes in SQL Server 2012: Link Discontinued features in SQL Server 2012: Link Get the upgrade advisor from the Microsoft Download Center at: Link Upgrade Advisor page on MSDN: Link Profiler: Review T-SQL code to identify objects no longer supported by Microsoft: Link Upgrading to SQL Server 2012 by Vinod Kumar: Link Reference: Pinal Dave (http://blog.sqlauthority.com) Filed under: PostADay, SQL, SQL Authority, SQL Query, SQL Server, SQL Tips and Tricks, T SQL, Technology Tagged: Upgrade

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Saving a Join Model

- by Thorpe Obazee

I've been reading the cookbook for a while now and still don't get how I'm supposed to do this: My original problem was this: A related Model isn't being validated From RabidFire's commment: If you want to count the number of Category models that a new Post is associated with (on save), then you need to do this in the beforeSave function as I've mentioned. As you've currently set up your models, you don't need to use the multiple rule anywhere. If you really, really want to validate against a list of Category IDs for some reason, then create a join model, and validate category_id with the multiple rule there. Now, I have these models and are now validating. The problem now is that data isn't being saved in the Join Table: class Post extends AppModel { var $name = 'Post'; var $hasMany = array( 'CategoryPost' => array( 'className' => 'CategoryPost' ) ); var $belongsTo = array( 'Page' => array( 'className' => 'Page' ) ); class Category extends AppModel { var $name = 'Category'; var $hasMany = array( 'CategoryPost' => array( 'className' => 'CategoryPost' ) ); class CategoryPost extends AppModel { var $name = 'CategoryPost'; var $validate = array( 'category_id' => array( 'rule' => array('multiple', array('in' => array(1, 2, 3, 4))), 'required' => FALSE, 'message' => 'Please select one, two or three options' ) ); var $belongsTo = array( 'Post' => array( 'className' => 'Post' ), 'Category' => array( 'className' => 'Category' ) ); This is the new Form: <div id="content-wrap"> <div id="main"> <h2>Add Post</h2> <?php echo $this->Session->flash();?> <div> <?php echo $this->Form->create('Post'); echo $this->Form->input('Post.title'); echo $this->Form->input('CategoryPost.category_id', array('multiple' => 'checkbox')); echo $this->Form->input('Post.body', array('rows' => '3')); echo $this->Form->input('Page.meta_keywords'); echo $this->Form->input('Page.meta_description'); echo $this->Form->end('Save Post'); ?> </div>  </div> The data I am producing from the form is as follows: Array ( [Post] => Array ( [title] => 1234 [body] => 1234 ) [CategoryPost] => Array ( [category_id] => Array ( [0] => 1 [1] => 2 ) ) [Page] => Array ( [meta_keywords] => 1234 [meta_description] => 1234 [title] => 1234 [layout] => index ) ) UPDATE: controller action //Controller action function admin_add() { // pr(Debugger::trace()); $this->set('categories', $this->Post->CategoryPost->Category->find('list')); if ( ! empty($this->data)) { $this->data['Page']['title'] = $this->data['Post']['title']; $this->data['Page']['layout'] = 'index'; debug($this->data); if ($this->Post->saveAll($this->data)) { $this->Session->setFlash('Your post has been saved', 'flash_good'); $this->redirect($this->here); } } } UPDATE #2: Should I just do this manually? The problem is that the join tables doesn't have things saved in it. Is there something I'm missing? UPDATE #3 RabidFire gave me a solution. I already did this before and am quite surprised as so why it didn't work. Thus, me asking here. The reason I think there is something wrong. I don't know where: Post beforeSave: function beforeSave() { if (empty($this->id)) { $this->data[$this->name]['uri'] = $this->getUniqueUrl($this->data[$this->name]['title']); } if (isset($this->data['CategoryPost']['category_id']) && is_array($this->data['CategoryPost']['category_id'])) { echo 'test'; $categoryPosts = array(); foreach ($this->data['CategoryPost']['category_id'] as $categoryId) { $categoryPost = array( 'category_id' => $categoryId ); array_push($categoryPosts, $categoryPost); } $this->data['CategoryPost'] = $categoryPosts; } debug($this->data); // Gives RabidFire's correct array for saving. return true; } My Post action: function admin_add() { // pr(Debugger::trace()); $this->set('categories', $this->Post->CategoryPost->Category->find('list')); if ( ! empty($this->data)) { $this->data['Page']['title'] = $this->data['Post']['title']; $this->data['Page']['layout'] = 'index'; debug($this->data); // First debug is giving the correct array as above. if ($this->Post->saveAll($this->data)) { debug($this->data); // STILL gives the above array. which shouldn't be because of the beforeSave in the Post Model // $this->Session->setFlash('Your post has been saved', 'flash_good'); // $this->redirect($this->here); } } }

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Rails belongs_to issue in the views

- by Jacobo Tibaquira

Hi, Im having problems with an association in rails: Currently I have Post and User models, and the relationship is set this way: class User < ActiveRecord::Base attr_accessible :username, :name, :lastname has_many :posts end class Post < ActiveRecord::Base attr_accessible :title, :body belongs_to :user end However, in my app/views/posts/index.html.haml when Im trying to access the username for the post I get this error: undefined method `name' for nil:NilClass This is my view: - title "Posts" %table %tr %th Title %th Body %th Author - for post in @posts %tr %td= h post.title %td= h post.body %td= h post.user.name %td= link_to 'Show', post %td= link_to 'Edit', edit_post_path(post) %td= link_to 'Destroy', post, :confirm => 'Are you sure?', :method => :delete %p= link_to "New Post", new_post_path Any thoughts of what Im doing wrong will be appretiated

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How to change my website's appearance in a Facebook wall post?

- by Lode

When posting a website link in a Facebook wall post, Facebook fetches some content (title, text and image) from the website to show it to readers. Is there a way I can adjust / propose which content is used / preferred by Facebook? I found someone saying to use <meta property="og:image" content="image.jpg">, but this doesn't seem to have any effect. But maybe Facebook caches these results for a while?

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Nginx wont send POST to fastcgi backend, but GET works fine?

- by xyld

Not sure why, but it is happy sending a GET to the fastcgi backend (Mercurial hgwebdir in this case), but simply resorts to the filesystem if the request is a POST. Relevant parts of nginx.conf: location / { root /var/www/htdocs/; index index.html; autoindex on; } location /hg { fastcgi_pass unix:/var/run/hg-fastcgi.socket; include fastcgi_params; if ($request_uri ~ ^/hg([^?#]*)) { set $rewritten_uri $1; } limit_except GET { allow all; deny all; auth_basic "hg secured repos"; auth_basic_user_file /var/trac.htpasswd; } fastcgi_param SCRIPT_NAME "/hg"; fastcgi_param PATH_INFO $rewritten_uri; # for authentication fastcgi_param AUTH_USER $remote_user; fastcgi_param REMOTE_USER $remote_user; #fastcgi_pass_header Authorization; #fastcgi_intercept_errors on; } GET's work fine, but POST delivers this error to the error_log: 2010/05/17 14:12:27 [error] 18736#0: *1601 open() "/usr/html/hg/test" failed (2: No such file or directory), client: XX.XX.XX.XX, server: domain.com, request: "POST /hg/test HTTP/1.1", host: "domain.com" What could possibly be the issue? I'm trying to allow read-only access via GET's to the page, but require authorization when using hg push to the same url which sends a POST request.

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Subversion hooks no longer running

- by Chris Lieb

I don't know when this started happening, but, for some reason, none of my Subversion hooks are running anymore. I am running Subversion 1.6.9 on a Gentoo Linux machine, which has had its hooks work in the past. I am running Subversion through the svn_dav module for Apache2.2. I modified the hook scripts that I make use of to write into a file in the /tmp directory owned by apache:apache whenever they are executed, but after making a commit, there is nothing in the file that should be written to. The scripts are executable and owned by apache:apache, so I don't think that is the issue. Here is one of my test scripts (post-commit.sh) that isn't getting executed: #!/bin/sh /bin/echo post-commit >> /tmp/z_test exit 0 After running a commit, I expect both the pre-commit.sh and post-commit.sh hooks to be run, but neither of them appear to be writing into the desired file (/tmp/z_test). What's going on?

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