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  • XSL(like) declarative language as MVC view over strongtyped model?

    - by Martin Kool
    As a huge XSL fan, I am very happy to use xsl as the view in our proprietary MVC framework on ASP.NET. Objects in the model are serialized under the hood using .NET's xml serializer, and we use quite atomic xsl templates to declare how each object or property should transform. For example: <xsl:template match="/Article"> <html> <body> <div class="article"> <xsl:apply-templates /> </div> </body> </html> </xsl:template> <xsl:template match="Article/Title"> <h1> <xsl:apply-templates /> </h1> </xsl:template> <xsl:template match="@*|text()"> <xsl:copy /> </xsl:template> This mechanism allows us to quickly override default matching templates, like having a template matching on the last item in a list, or the selected one, etc. Also, xsl extension objects in .NET allow us just the bit of extra grip that we need. Common shared templates can be split up and included. However Even though I can ignore the verbosity downside of xsl (because Visual Studio schema intellisense + snippets really is slick, praise to the VS-team), the downside of not having intellisense over strongtyped objects in the model is really something that's bugging me. I've seen ASP.NET MVC + user controls in action and really starting to love it, but I wonder; Is there a way of getting some sort of intellisense over XML that we're iterating over, or do you know of a language that offers the freedom and declarativeness of XSL but has the strongtype/intellisense benefits of say webforms/usercontrols/asp.net.mvc-view? (I probably know the answer: "no", and I'll find myself using Phil Haack's utterly cool mvc shizzle soon...)

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  • How to handle javascript & css files across a site?

    - by Industrial
    Hi everybody, I have had some thoughts recently on how to handle shared javascript and css files across a web application. In a current web application that I am working on, I got quite a large number of different javascripts and css files that are placed in an folder on the server. Some of the files are reused, while others are not. In a production site, it's quite stupid to have a high number of HTTP requests and many kilobytes of unnecessary javascript and redundant css being loaded. The solution to that is of course to create one big bundled file per page that only contains the necessary information, which then is minimized and sent compressed (GZIP) to the client. There's no worries to create a bundle of javascript files and minimize them manually if you were going to do it once, but since the app is continuously maintained and things do change and develop, it quite soon becomes a headache to do this manually while pushing out new updates that features changes to javascripts and/or css files to production. What's a good approach to handle this? How do you handle this in your application?

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  • Remove php extension from URL on Windows hosting account using web.config

    - by asprin
    I've searched before asking this question. The answered ones were related to Linux hosting account and the ones with Windows hosting account didn't match what I was looking for. As you might have guessed, I've a Windows shared hosting account with godaddy. My aim was to remove the '.php' extension from the url. After researching I found that .htaccess would do exactly what I want. But I also found that .htaccess doesn't work in Windows environment and that I'll need a web.config file to do the same task. Now I know there are modules through which the code can be generated, but the problem is I don't know how to get them installed on my hosting account. I don't want to go through the process of contacting the people over at godaddy and hence I'm looking to solve this on my own. What I'm looking for is a web.config equivalent of .htaccess This is what I'm trying to achieve: Current URL : www.abcdef.com/contact.php Desired URL : www.abcdef.com/contact Any help would be greatly appreciated. Thanks, Nisar.

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  • MySQL Query Where Column Like Column

    - by shmeeps
    I'm working on a small project that involves grabbing a list of contacts which are stored for each group. Essentially, the database is set up so that each group has a primary and secondary contact stored as, unsurprisingly, Group.Primary and Group.Secondary. The objective is to pull every Primary and Secondary contact for each Group and display them in a sortable table. I have the sortable table all worked out, but I have come across a small problem. Each primary and secondary field can have more than one contact separated by a comma. For instance, if Primary contained 123,256 , it would need to pull both Contacts with IDs 123 and 256. I had intended to use a query formatted like this: SELECT * FROM Group G, Contacts C WHERE G.Primary LIKE %C.ID% OR G.Secondary LIKE %C.ID% so that I could just skip the comma part, but I can't seem to find a working query for this. My question to you is, am I just overlooking something here? Is there a simple query that would let me do this? Or am I better off getting the groups and contacts separately, and combine the two later. I think the former is a little easier to understand when read, which is a plus as this is a shared project, but if that is not possible I will do the latter. This code is simplified, but it gets the point across.

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  • getting page info from a webpage while sharing facebook style

    - by user556167
    Hi all. I am writing an app to share a page to friends when browsing. To this end, I can get the url of the page to my app and display it on the screen. Could anyone tell me, how to improve this, to show the headline of the page and the picture of a page as it appears when a page is being shared to friends on facebook. Here is the code to get and display the url of the page: Intent intent = getIntent(); String action = intent.getAction(); String type = intent.getType(); String mNewLinkUrl=""; if (action != null && type != null && Intent.ACTION_SEND.equals(action) && "text/plain".equals(type)){ mNewLinkUrl = intent.getStringExtra(Intent.EXTRA_TEXT); } TextView ptext = (TextView) findViewById(R.id.pagetext); ptext.append("\n"+mNewLinkUrl); Any insight will be appreciated. //update 1 found a method: use Jsoup to download the html as a Document. And use Elements and Element to get the data. For eg, the following is the code to get the links in imports in the html page: Elements imports = doc.select("link[href]"); for (Element link : imports) { Log.d(TAG,"link.tagName()"+link.tagName()+"link.attr(abs:href)"+link.attr("abs:href") +"link.attr(rel)"+link.attr("rel")); } But I am not able to figure out what attributes facebook exactly gets. Can anyone help me in this? Thank you.

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  • How can I set paperclip's storage mechanism based on the current Rails environment?

    - by John Reilly
    I have a rails application that has multiple models with paperclip attachments that are all uploaded to S3. This app also has a large test suite that is run quite often. The downside with this is that a ton of files are uploaded to our S3 account on every test run, making the test suite run slowly. It also slows down development a bit, and requires you to have an internet connection in order to work on the code. Is there a reasonable way to set the paperclip storage mechanism based on the Rails environment? Ideally, our test and development environments would use the local filesystem storage, and the production environment would use S3 storage. I'd also like to extract this logic into a shared module of some kind, since we have several models that will need this behavior. I'd like to avoid a solution like this inside of every model: ### We don't want to do this in our models... if Rails.env.production? has_attached_file :image, :styles => {...}, :storage => :s3, # ...etc... else has_attached_file :image, :styles => {...}, :storage => :filesystem, # ...etc... end Any advice or suggestions would be greatly appreciated! :-)

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  • What are your suggestions for best practises for regular data updates in a website database?

    - by bboyle1234
    My shared-hosting asp.net website must automatically run data update routines at regular times of day. Once it has finished running certain update routines, it can run update routines that are dependent on the previous updates. I have done this type of work before, using quite complicated setups. Some features of the framework I created are: A cron job from another server makes a request which starts a data update routine on the main server Each updater is loaded from web.config Each updater overrides a "canRunUpdate" method that determines whether its dependencies have finished updating Each updater overrides a "hasFinishedUpdate" method Each updater overrides a "runUpdate" method Updaters start and run in parallel threads The initial request from the cron job server started each updater in its own thread and then ended. As a result, the threads containing the updaters would be terminated before the updaters were finished. Therefore I had to give the updaters the ability to save partial results and continue the update job next time they are started up. As a result, the cron server had to call the updater many times to ensure the job is done. Sometimes the cron server would continue making update requests long after all the updates were completed. Sometimes the cron server would finish calling the update requests and leave some updates uncompleted. It's not the best system. I'm looking for inspiration. Any ideas please? Thank you :)

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  • NHibernate Entity code conversion from #C to VB.Net

    - by CoderRoller
    Hello and thanks for your help in advance. I am starting on the NHibernate world and i am experimenting with the NHibernate CookBook recipes, i am trying to set a base entity class for my entities and this is the C# code for this. I would like to know whats the VB.NET version so i can implement it in my sample project. This is the C# code: public abstract class Entity<TId> { public virtual TId Id { get; protected set; } public override bool Equals(object obj) { return Equals(obj as Entity<TId>); } private static bool IsTransient(Entity<TId> obj) { return obj != null && Equals(obj.Id, default(TId)); } private Type GetUnproxiedType() { return GetType(); } public virtual bool Equals(Entity<TId> other) { if (other == null) return false; if (ReferenceEquals(this, other)) return true; if (!IsTransient(this) && !IsTransient(other) && Equals(Id, other.Id)) { var otherType = other.GetUnproxiedType(); var thisType = GetUnproxiedType(); return thisType.IsAssignableFrom(otherType) || otherType.IsAssignableFrom(thisType); } return false; } public override int GetHashCode() { if (Equals(Id, default(TId))) return base.GetHashCode(); return Id.GetHashCode(); } } I tried using an online converter but puts a Nothing reference in place of default(TId) that doesn't seem right to me that's why I request for help: Private Shared Function IsTransient(obj As Entity(Of TId)) As Boolean Return obj IsNot Nothing AndAlso Equals(obj.Id, Nothing) End Function I Would appreciate the insight you may give me on the subject.

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  • File being used by another process. Reason, and solution?

    - by pstar
    The process cannot access the file 'abc.log' because it is being used by another process. Hi, I've seen this exception from my application occationaly but I am still trying to fix that, hope I will get some insight from stackoverflow. In my application I've have defined a WriteToLog function which will write to a log file. Also the mainForm of my application will launch a backgroundWorker do some job which also calls the WriteToLog. Maybe two threads access a file will cause a problem? But in my code I 've already do my best to write flush and close the text file (I think), and here is my code from WriteToLog: StreamWriter sw = null; string newText = ""; try { //populate the content for newText sw = File.AppendText(LOG_FILE); sw.Write(newText); sw.Flush(); sw.Close(); } catch (IOException ex) { MessageBox.Show("Failed to write to log!\n\t" + ex.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error); } finally { if (sw != null) { sw.Close(); } } I think as long as I flush and close the streamWriter, I should be able call the WriteToLog multi-times and in multi-threads isn't it? Or if I am wrong, could I simple make the file open shared, or there are other reason/solutions?

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  • Sharing class member data between sub components

    - by Tim Gradwell
    I have an aggregate 'main' class which contains some data which I wish to share. The main class also has other class members. I want to share the data with these other class members. What is the correct / neatest way to do this? The specific example I have is as follows. The main class is a .net Form. I have some controls (actually controls within controls) on the main form which need access to the shared data. Main Form - DataX - DataY - Control1 -- Subcontrol1 - Control2 -- SubControl2 SubControls 1 and 2 both wish to access DataX and DataY. The trouble is, I feel like better practice (to reduce coupling), would be that either subcontrols should not know about Main Form, or Main Form should not know about subcontrols - probably the former. For subcontrols not to know about Main Form, would probably mean Main Form passing references to both Controls 1 and 2, which in turn would pass the references on to SubControls 1 and 2. Lots of lines of code which just forward the references. If I later added DataZ and DataW, and Controls 3 and 4 and SubControls 3 and 4, I'd have to add lots more reference forwarding code. It seems simpler to me to give SubControls 1 and 2 member references to Main Form. That way, any sub control could just ask for MainForm.DataX or MainForm.DataY and if I ever added new data, I could just access it directly from the sub controls with no hassle. But it still involves setting the 'MainForm' member references every time I add a new Control or Subcontrol. And it gives me a gut feeling of 'wrong'. As you might be able to tell I'm not happy with either of my solutions. Is there a better way? Thanks

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  • jQuery ajax request response is empty in Internet Explorer

    - by Aprilia1982
    Hi, I'm doing the following ajax call: //exif loader function LoadExif(cImage) { $.ajax({ type: "POST", url: "http://localhost:62414/Default1.aspx/GetImageExif", data: "{iCurrentImage:" + cImage + "}", contentType: "application/json; charset=utf-8", dataType: "json", error: ajaxFailed, success: function (data, status) { var sStr = ''; for (var count in data.d) { sStr = sStr + data.d[count]; }; alert(sStr); } }); }; In Firefox the request works really fine. When I try to run the code in Internet Explorer, the response is empty. Here is the webmethod witch is called: <WebMethod()> _ <ScriptMethod(ResponseFormat:=ResponseFormat.Json)> _ Public Shared Function GetImageExif(ByVal iCurrentImage As Integer) As String Dim sbTable As New StringBuilder sbTable.AppendLine("<table>") sbTable.AppendLine("<tr>") sbTable.AppendLine("<td>Name</td><td>" & gGallery.Images(iCurrentImage).File.Name & "</td>") sbTable.AppendLine("</tr>") sbTable.AppendLine("</table>") Return sbTable.ToString End Function Any ideas? Jan

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  • Wordpress and Dynamic Programming Php

    - by user1675146
    I have geography pages for two types of business listings. Each page goes from state, county, city, but I need to have the same geography shared between two types of business. My two business types are dentist and chiropractors. I am trying to have a permalink structure like this: enter code here xyz.com/dentist/alabama enter code here xyz.com/dentist/alabama/polk-county/ enter code here xyz.com/chiropractors/alabama/ enter code here xyz.com/chiropractors/alabama/polk-county/ I originally was going to load the geography as pages and subpages, but with that method I cannot get the permalink separated by the type chiropractor and dentist. So now I have created a custom post type one for chiropractor and one for dentist which give me the permalink xyz.com/dentist and xyz.com/chiropractor. My question is now how to handle my category geography page. I was wondering if in wordpress it is possible to create a shell page such as xyz.com/dentist/[state]/ and then through php dynamically build a page for each state? So where it shows [state] it will be replaced with the actual state such as alabama, california etc when that specific page is viewed. But the shell page is just 1 page in the database. If so could someone give me a basic explanation on how to instruct a programmer to do this? Thank you.

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  • Using AJAX in Rails: How do I change a button as soon as it's clicked?

    - by sdc
    Hey! I'm teaching myself Ruby, and have been stuck on this for a couple days: I'm currently using MooTools-1.3-compat and Rails 3. I'd like to replace one button (called "Follow") with another (called "Unfollow") as soon as someone clicks on it. I'm using :remote = true and have a file ending in .js.erb that's being called...I just need help figuring out what goes in this .js file The "Follow" button is in a div with id="follow_form", but there are many buttons on the page, and they all have an id = "follow_form"...i.e. $("follow_form").set(...) replaces the first element and that's not correct. I need help replacing the button that made the call. I looked at this tutorial, but the line below doesn't work for me. Could it be because I'm using MooTools instead of Prototype? $("follow_form").update("<%= escape_javascript(render('users/unfollow')) %") ps. This is what I have so far, and this works: in app/views/shared: <%= form_for current_user.subscriptions.build(:event => @event), :remote => true do |f| %> <div><%= f.hidden_field :event %></div> <div class="actions"><%= f.submit "Follow" %></div> <% end %> in app/views/events/create.js.erb alert("follow!"); //Temporary...this is what I'm trying to replace *in app/controllers/subscriptions_controller.rb* def create @subscription = current_user.subscriptions.build(params[:subscription]) @subscription.save respond_to do |format| format.html { redirect_to(..) } format.js {render :layout} end Any help would be greatly, greatly appreciated!

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  • How to multi-thread this?

    - by WilliamKF
    I wish to have two threads. The first thread1 occasionally calls the following pseudo function: void waitForThread2() { if (thread2 is not idle) { return; } notifyThread2IamReady(); while (thread2IsExclusive) { } } The second thread2 is forever in the following pseudo loop: for (;;) { Notify thread1 I am idle. while (!thread1IsReady()) { } Notify thread1 I am exclusive. Do some work while thread1 is blocked. Notify thread1 I am busy. Do some work in parallel with thread1. } What is the best way to write this such that both thread1 and thread2 are kept as busy as possible on a machine with multiple cores. I would like to avoid long delays between notification in one thread and detection by the other. I tried using pthread condition variables but found the delay between thread2 doing 'notify thread1 I am busy' and the loop in waitForThread2() on thear2IsExclusive() can be up to almost one second delay. I then tried using a volatile sig_atomic_t shared variable to control the same, but something is going wrong, so I must not be doing it correctly.

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  • [C#] How do I make hierarchy of objects from two alternating classes?

    - by Millicent
    Here's the scenario: I have two classes ("Page" and "Field"), that are descended from a common class ("Pield"). They represent tags in an XML file and are in the following hierarchy: <page> <field> <page> ... </page> ... </field> ... </page> I.e.: Page and Field objects are in a hierarchy of alternating type (there may be more than one Page or Field to each rung of the hierarchy). Every Field and Page object has a parent property, which points to the respective parent object of the other type. This is not a problem unless the parent-child mechanism is controlled by the base class (Pield), which is shared by the two descended classes (Page and Field). Here is one try, that fails at the line "Pield child = new Pield(pchild, this);": class Pield<T> { private T _pield_parent; ... private void get_children() { ... Pield<Page> child = new Pield<Page>(pchild, this); ... } ... } class Page : Pield<Field> { ... } class Field : Pield<Page> { ... } Any ideas about how to solve this elegantly? Best, Millicent

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  • Share variable across site ASP.NET

    - by Anders
    I have a class isSearching with a single boolean property in a 'functions' file in my webapp. On my search page, I have a variable oSearchHandler declared as a Public Shared variable. How can I access the contents of oSearchHandler on other pages in my webapp? Code with Session.... 'search.aspx Public Function oSearchString(ByVal oTextBoxName As String) As String For Each oKey As String In Request.Form.AllKeys If oKey.Contains(oTextBoxName) Then Session.Add("searching", True) Session.Add("search-term", Request.Form(oKey)) Return Request.Form(oKey) End If Next Return "" End Function 'theMaster.master <% If Session("searching") Then %><ul style="float: right;"> <li> <div class="gsSearch"> <asp:TextBox ID="searchbox" runat="server"></asp:TextBox> </div> </li> <li> <div class="gsSearch"> <asp:Button ID="searchbutton" runat="server" Text="search" UseSubmitBehavior="true" PostBackUrl="search.aspx" CssClass="searchBtn" /> </div> </li> </ul> <% End If %> I think that the session will work just fine.

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  • VB.NET: WithEvents not Working

    - by Hei
    Hello All, I have the following classes: Public Class Email Private Shared ReadOnly EMAIL_REGEX = "\b[a-zA-Z]+[a-zA-Z0-9._+-]+@" + _ "[a-zA-Z0-9.-]+\.[a-zA-Z]{2,3}\b" Private _email As String Public Event emailCreated() ' Declare empty constructor private so the only way to create an object ' is using new (email) Private Sub New() End Sub Sub New(ByVal email As String) If Regex.IsMatch(email, EMAIL_REGEX) Then _email = email RaiseEvent emailCreated() Else Throw New Exception("Email Not Valid") End If End Sub ReadOnly Property Email() As String Get Return _email End Get End Property End Class And Public Class EmailForm WithEvents myEmail As Email Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click Try myEmail = New Email(TextBox1.Text) Catch ex As Exception MessageBox.Show("Exception: " & ex.Message) End Try End Sub Public Sub emailCreated() Handles myEmail.emailCreated MessageBox.Show("New Email Created") End Sub End Class If a create a wrong email lets say "email" the exception is correctly cached and a message is showed however is i input a valid email the event is not raised, the object is being created but no message is shown and no error or exception is thrown i suspect it has something to do with using "myemail = new Email(email)" but i have seen examples of using new with withevents with no problem. I would apreciate any input about this problem thank you

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  • Location of DB models in Zend Framework - want them centralized

    - by jeffkolez
    Maybe I've been staring at the problem too long and it's much simpler than I think, but I'm stuck right now. I have three websites that are going to share database models. I've structured my applications so that I have an application directory for each site and a public directory for each site. The DB models live in a directory in the library along with Zend Framework and my third party libraries. I use the Autoloader class and when I try to instantiate one of my DB classes, it fails. The library directory is in my include path, but for whatever reason it refuses to instantiate my classes. It will work if I have my models in my application directory, but that's not the point. They're supposed to be shared classes in a Library. $model = new Model_Login(); $model->hello_world(); This fails when its in the library. The class is just a test: class Model_Login { public function hello_world() { echo "hello world"; } } Everything works until I try to instantiate one of my models. I've even tried renaming the class to something else (Db_Login), but that doesn't work either. Any ideas? Thanks in advance.

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  • The cross-thread usage of "HttpContext.Current" property and related things

    - by smwikipedia
    I read from < Essential ASP.NET with Examples in C# the following statement: Another useful property to know about is the static Current property of the HttpContext class. This property always points to the current instance of the HttpContext class for the request being serviced. This can be convenient if you are writing helper classes that will be used from pages or other pipeline classes and may need to access the context for whatever reason. By using the static Current property to retrieve the context, you can avoid passing a reference to it to helper classes. For example, the class shown in Listing 4-1 uses the Current property of the context to access the QueryString and print something to the current response buffer. Note that for this static property to be correctly initialized, the caller must be executing on the original request thread, so if you have spawned additional threads to perform work during a request, you must take care to provide access to the context class yourself. I am wondering about the root cause of the bold part, and one thing leads to another, here is my thoughts: We know that a process can have multiple threads. Each of these threads have their own stacks, respectively. These threads also have access to a shared memory area, the heap. The stack then, as I understand it, is kind of where all the context for that thread is stored. For a thread to access something in the heap it must use a pointer, and the pointer is stored on its stack. So when we make some cross-thread calls, we must make sure that all the necessary context info is passed from the caller thread's stack to the callee thread's stack. But I am not quite sure if I made any mistake. Any comments will be deeply appreciated. Thanks. ADD Here the stack is limited to user stack.

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  • multiple dependent android projects in eclipse

    - by lope
    Hi there! I just started to play with android dev and java+eclipse is pretty new to me. I managed to create simple project and run it on my device. Now I want to create simple game (more of them actually) and I would love to use shared code base for all of them (game loop, initialization, etc..). Problem is that I have no idea how to correctly do this. I created android project called engine with all basic stuff that I need and made it work on device. Now I tried to create another project in same workspace called mygame. Main class (activity) of mygame is MyGameApp which inherits from EngineApp (main activity of my engine project) which inherits from Activity. I added engine project into required projects in mygame build path tab in properties. Problem is that when I try to run this project it crashes on ClassNotFoundException trying to find my MyGameApp class. Any help (or pointer to some articles that explain how this is done) is greatly appreciated. few hours of googling didn't help much :/

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  • Is there a way to sync (two way) tables betwen a mysql server and a local MS Access?

    - by Kailen
    Help me figure out a solution to a (not so unique) problem. My research group has gps devices attached to migratory animals. Every once in a while, a research tech will be within range of an animal and will get the chance to download all the logged points. Each individual spits out a single dbf and new locations are just appended to the end (so the file is just cumulative). These data need to be shared among a research group. Everyone else (besides me) wants to use access, so they can make small edits and prefer that interface. They do not like using MySQL. The solution I came up with is: a) The person who downloads the file goes to a web page, enters animal ID into a form, chooses .dbf file and uploads to a mysql database on the server (I still have to write php code to read the dbf and write sql insert statements from it). b) Everyone syncs from their local access database to the server. (This is natively possible from access but very clunky). Is there a tool (preferably open source), that can compare a access table to mysql table and sync the two (both ways)? Alternatively, does anyone have a more elegant solution? The ultimate goal is to allow everyone to have access to the most current data on their computers using their preferred database app.

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  • How to change the default branch to push in mercurial?

    - by timmfin
    I like creating named branches in Mercurial to deal with features that might take a while to code, so when I push I do a hg push -r default to insure I'm only pushing changes to the default branch. However, it is a pain to have to remember -r default every since time I do do a push or outgoing command. So I tried fix this by adding this config to my ~/.hgrc: [defaults] push = push -r default outgoing = outgoing -r default The problem is, those config lines are not really defaults, they are aliases. They work as intended until I try to do a hg push -r <some revision>. And the "default" I've setup just obliterates the revision I passed in. (I see that defaults are deprecated, but aliases have the same problem). I tried looking around, but I can't find anything that will allow me to set a default branch to push AND allow me to override it when necessary. Anyone know of something else I could do? ps: I do realize that I could have separate clones for each branch, but I would rather not do that. It's annoying to have to switch directories, particularly when you have shared configuration or editor workspaces.

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  • Rails Form Submission, User can't be blank

    - by pmanning
    I'm trying to create an event through an event form and I keep getting a form error that says "User can't be blank". The event needs a user_id to post a feed_item showing who created the event. Why can't this event get created? event.rb class Event < ActiveRecord::Base attr_accessible :description, :location, :title, :category_id, :start_date, :start_time, :end_date, :end_time, :image belongs_to :user belongs_to :category has_many :rsvps has_many :users, through: :rsvps, dependent: :destroy mount_uploader :image, ImageUploader validates :title, presence: true, length: { maximum: 60 } validates :user_id, presence: true create_events.rb (database) class CreateEvents < ActiveRecord::Migration def change create_table :events do |t| t.string :title t.date :start_date t.time :start_time t.date :end_date t.time :end_time t.string :location t.string :description t.integer :category_id t.integer :user_id t.timestamps end add_index :events, [:user_id, :created_at] end end events_controller.rb def new @event = Event.new @user = current_user end def create @event = current_user.events.build(params[:event]) if @event.save flash[:success] = "Sesh created!" redirect_to root_url else @feed_items = [] render 'static_pages/home' end end routes.rb SampleApp::Application.routes.draw do resources :users do member do get :following, :followers, :events end end resources :events do member do get :members end end root to: 'static_pages#home' events/new.html.erb <%= form_for @event, :html => {:multipart => true} do |f| %> <%= render 'shared/error_messages', object: @event %>

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  • Question about SharedPreferences

    - by chobo2
    I am looking an android Shared Preferences and I am wondering is there a way to just check if the preferences file exists. SharedPreferences mySharedPreferences ; mySharedPreferences=getSharedPreferences(“Name_of_your_preference”,mode); This above code leads me to believe that "Name_of_Your_preferene" is stored as a file or some sort of container that will contain your preferences. I am wondering is there away to check if this exists or not. When a user loads up an activity I want to save all the settings into this file with some default values(off for all settings). However I only want to do this if they are going to the page for the first time. Otherwise if I would do something like this every time the page loads up SharedPreferences.Editor editor= mySharedPreferences.edit(); /* now store your primitive type values. In this case it is true, 1f and Hello! World */ editor.putBolean(“myBoolean”,true); editor.putFloat(“myFloat”,1f); editor.putString(“myString”,” Hello! World”); I am guessing it would override all settings even ones they set.

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  • Xenserver 5.6 SR_BACKEND_FAILURE_47 no such volume group, but it is there

    - by Juan Carlos
    I've looked everywhere (Google, here, a bunch of other sites), and while I have found people with similar problems, I couldn't find a single one with a solution to this. Last night our xenserver 5.6 box corrupted the /var/xapi/state.db, and I couldn't fix the xml, no matter what I did. After a good hour fiddling with the file, I figured it would be faster to just reinstall. The server had one 2tb hard drive running Xen and its VMs, and since Xen's install said it would erase the hard drive it was installed on, I plugged a new harddrive and installed Xen on it, without selecting any hard drives for storage. I Figured I could make it happen after install, using the partition on the old harddrive with all my VMs on it. After instalation finished and the system booted I did: #fdisk -l found the old partition at /dev/sda3 #ll /dev/disk/by-id found the partition at /dev/disk/by-id/scsi-3600188b04c02f100181ab3a48417e490-part3 #xe host-list uuid ( RO) : a019d93e-4d84-4a4b-91e3-23572b5bd8a4 name-label ( RW): xenserver-scribfourteen name-description ( RW): Default install of XenServer #pvscan PV /dev/sda3 VG VG_XenStorage-405a2ece-d10e-d6c5-ede2-e1ad2c29c68d lvm2 [1.81 TB / 204.85 GB free] Total: 1 [1.81 TB] / in use: 1 [1.81 TB] / in no VG: 0 [0 ] #vgscan Reading all physical volumes. This may take a while... Found volume group "VG_XenStorage-405a2ece-d10e-d6c5-ede2-e1ad2c29c68d" using metadata type lvm2 # pvdisplay --- Physical volume --- PV Name /dev/sda3 VG Name VG_XenStorage-405a2ece-d10e-d6c5-ede2-e1ad2c29c68d PV Size 1.81 TB / not usable 6.97 MB Allocatable yes PE Size (KByte) 4096 Total PE 474747 Free PE 52441 Allocated PE 422306 PV UUID U03Gt9-WtHi-8Nnu-QB2Q-c7BV-CO9A-cFpYWW # xe sr-introduce name-label="VMs" type=lvm uuid=U03Gt9-WtHi-8Nnu-QB2Q-c7BV-CO9A-cFpYWW name-description="VMs Local HD Storage" content-type=user shared=false device-config=:device=/dev/disk/by-id/scsi-3600188b04c02f100181ab3a483f9f0ae-part3 U03Gt9-WtHi-8Nnu-QB2Q-c7BV-CO9A-cFpYWW # xe pbd-create host-uuid=a019d93e-4d84-4a4b-91e3-23572b5bd8a4 sr-uuid=U03Gt9-WtHi-8Nnu-QB2Q-c7BV-CO9A-cFpYWW device-config:device=/dev/disk/by-id/scsi-3600188b04c02f100181ab3a483f9f0ae-part3 adf92b7f-ad40-828f-0728-caf94d2a0ba1 # xe pbd-plug uuid=adf92b7f-ad40-828f-0728-caf94d2a0ba1 Error code: SR_BACKEND_FAILURE_47 Error parameters: , The SR is not available [opterr=no such volume group: VG_XenStorage-U03Gt9-WtHi-8Nnu-QB2Q-c7BV-CO9A-cFpYWW] At this point I did a # vgrename VG_XenStorage-405a2ece-d10e-d6c5-ede2-e1ad2c29c68d VG_XenStorage-U03Gt9-WtHi-8Nnu-QB2Q-c7BV-CO9A-cFpYWW cause the VG name was different, but pdb-plug still gives me the same error. So, now I'm kinda lost about what to do, I'm not used to Xen and most sites I've been finding are really unhelpful. I hope someone can guide me in the right way to fix this. I cant lose those VMs (got backups, but from inside the guests, not the VMs themselves).

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