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• Compressing a hex string in Ruby/Rails

  - by PreciousBodilyFluids

  I'm using MongoDB as a backend for a Rails app I'm building. Mongo, by default, generates 24-character hexadecimal ids for its records to make sharding easier, so my URLs wind up looking like: example.com/companies/4b3fc1400de0690bf2000001/employees/4b3ea6e30de0691552000001 Which is not very pretty. I'd like to stick to the Rails url conventions, but also leave these ids as they are in the database. I think a happy compromise would be to compress these hex ids to shorter collections using more characters, so they'd look something like: example.com/companies/3ewqkvr5nj/employees/9srbsjlb2r Then in my controller I'd reverse the compression, get the original hex id and use that to look up the record. My question is, what's the best way to convert these ids back and forth? I'd of course want them to be as short as possible, but also url-safe and simple to convert. Thanks!

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• performing a javascript event without triggering that event handler

  - by bento

  In my latest code, I have an event handler for a focus on a textarea. When the user clicks on the textarea, that event-handler is triggered which sets some other DOM states based on the selected textarea. However, elsewhere in my program I want to programmatically set the focus of the textarea without triggering that event handler. I know Backbone, for instance, has a way to silently perform an action. My only pseudo-solution is to temporarily set a variable: var silence = true; And then, in my event handler, only perform the logic if silence is false. The handler is still triggered, but the logic doesn't run. Does anyone else know of better strategies for this?

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• Asp.net razor textbox array for list items

  - by yycdev

  I can't find or figure out how to take a list of items (cupcakes) and display them in razor with a quantity field. What is happening is I am not able to get the values for each cupcake quantity in the list. Can you do textbox arrays in Razor? VIEW <div class="form-group"> <label>Cupcakes</label> @foreach (var cupcake in Model.CupcakeList) { @Html.TextBox("CupcakeQuantities", cupcake.Id) @cupcake.Name <br/> } </div> MODEL public List<Cupcake> CupcakeList { get; set; } public List<int> CupcakeQuantities { get; set; } CONTROLLER public ActionResult Create() { var model = new PartyBookingModel() { CupcakeList = db.Cupcakes.ToList(), CupcakeQuantities = new List<int>() }; return View(model); }

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• Exceptions in ASP.MVC

  - by George

  Hello guys, I'm here again with another question about MVC. Here is the deal. I have a simple table/class with an Id and a Name. Names suppossed to be unique, and are modeled like that in the DB. I created my controller and everything just works fine. But if I try to insert a name that already exists, an exception should be thrown. I'm just not finding what is the correct kind of exception and it's namespace. The error must be coming from the DB, so... Any ideas? Thanks

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• Ajax routes in Rails 3

  - by Jatin

  In my Rails 2.3 application, the following routes were working properly map.ajax 'ajax', :controller => 'widgetresponse_controller' , :action => 'getWidgetJson' When I migrated to Rails 3, I tried a number of new routes, to get this working but none of them worked. 1. match 'ajax' => 'widgetresponse#getWidgetJson', :as => :ajax 2. match 'ajax' => 'widgetresponse_controller#getWidgetJson', :as => :ajax 3. get 'widgetresponse/getWidgetJson', :as => :ajax 4. get 'widgetresponse/getWidgetJson' Its a very basic question to ask, but I don't know what I am doing wrong.

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• how to run progress-bar through insert query ?

  - by Gold

  hi i have this insert query: try { Cmd.CommandText = @"INSERT INTO BarcodTbl SELECT * FROM [Text;DATABASE=" + PathI + @"\].[Tmp.txt];"; Cmd.ExecuteNonQuery(); Cmd.Dispose(); } catch (Exception ex) { MessageBox.Show(ex.Message); } and i have two question: how to run progress-bar from the begging to the end of the insert ? if there any error i got the error exception and the action is stop - the query stop and the BarcodTbl is empty. how i can see the error and that the query will continue to fill the table ? thank's in advance

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• Rails and jQuery - how do you get server-side validation errors to your view after an ajax request

  - by adam

  Ive searched this site but questions are usually regarding doing client-side validations or for different frameworks. I have a tasks list whose items can be edited inline. Upon submitting the inline edit form the item is updated all thanks to jQuery, ajax and rails. But I want to handle bad input from the user. HTML requests redisplay the view and errors are displayed thanks to rails helpers. But how do I insert that information after an ajax call? Heres my update method in my controller def update @task = Task.find(params[:id]) respond_to do |format| if @task.update_attributes(params[:task]) flash[:notice] = 'Task was successfully updated.' format.html { redirect_to(@task) } format.xml { head :ok } format.js else format.html { render :action => "edit" } format.xml { render :xml => @task.errors, :status => :unprocessable_entity } #format.js ...hmmm... either go to js.erb file or do stuff inline end end end

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• Reject (Hard 404) ASP.NET MVC-style URLs

  - by James D

  Hi, ASP.NET MVC web app that exposes "friendly" URLs: http://somesite.com/friendlyurl ...which are rewritten (not redirected) to ASP.NET MVC-style URLs under the hood: http://somesite.com/Controller/Action The user never actually sees any ASP.NET MVC style URLS. If he requests one, we hard 404 it. ASP.NET MVC is (in this app) an implementation detail, not a fundamental interface. My question: how do you examine an arbitrary incoming URL and determine whether or not that URL matches a defined ASP.NET MVC path? For extra credit: how do you do it from inside an ASP.NET-style IHttpModule, where you're getting invoked upstream from the ASP.NET MVC runtime? Thanks!

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• newline character on text area

  - by Prady

  I have a custom field called Current_Address__c which is of datatype textarea. I need to populate this field in the format below. ie a newline char after street and another newline after zip. street City state Zip Country The values of city state zip country etc are been taken from contact object. I dont want to use this as a formula field. So i need to populate it in my controller and display it on my VF page. I am trying to add a newline char by using the code below this.customobj.Current_Address__c = currentStreet + '\\n ' + currentCity + ' ' + currentState + ' ' + currentZIP + '\\n ' + currentCountry ; i had also used \n instead of \n. It still show the field in one line instead of 3 lines

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• precise geolocalization via IP

  - by meo

  I tied the iPad the other day, and was amazed about the precision of the geolocalization by ip. Actually there is this action against hunger in the world that shows you very precisely where the persons are located that have took part to this petition: http://www.1billionhungry.org/meodai/impact/ I would like to integrate that in one of my projects. I took a look at the source but i could not figure out how they did it. Can someone help me out? is there a web service for that? Is the google map api doing this or are they using an other service? PS: Its not just the country/region of your IP/ISP IP that the service gives back, its a pretty precise positioning.

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• How to access Grails domain classes in Java service layer?

  - by batmannavneet

  How can I use grails domain classes (which is in groovy) in service layer which is in Java/Spring. When using the grails MVC, everything is fine as I can use controller to access domain objects and call CRUD and other dynamic methods on them. But, what I am wondering is is there a clean way to do it from Java - say the service layer. For example, I may want to develop a reporting framework where I need to use domain objects to access the DB. I Hope the question is clear. This should be a standard problem that everybody must have faced in a reasonably sized project. I am just wondering how it is solved..maybe I am missing something here. thanks.

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• url to http request object

  - by takeshin

  I need to convert string like this: $url = 'module/controller/action/param1/param1value/paramX/paramXvalue'; to url regarding current router (including translation and so on). Usually I generate the target urls using url view helper, but for this I need to specify all params, so I would need to manually explode the string. I tried to use request object, like this: $request = new Zend_Controller_Request_Http(); // some code here passing the $url Zend_Debug::dump($request->getControllerName()); // null instead of 'controllers' Zend_Debug::dump($request->getParams()); // null instead of array but this seems to be suspected. Do I need to dispatch this request? How to handle this case well?

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• How to validate a form reCaptcha in MVC C#

  - by Alexidze

  I have a page that contains several forms, by submitting each one of them, next form becomes visible. the last form contains a recaptcha validator, my problem starts here, if i declare an action result for that page like this [CaptchaValidator] public ActionResult myAction(SomeModel model, string lang) { return View("towing", model); } I'm getting an argument null exeption parameter "Challenge", which in fact means that you have to POST those fields from recaptcha for the validation to appear and I cannot post anyting untill the last for is visible and posted. then I've added a news ActionResult like myActionValidated, defined a route for it like: mypage/validate pointing to that actionresult and then i don't know where to go from here, i want simply do display a message if the reCaptcha did not validate and redirect to a URL if it succeeded. I hope I made myself clear. Thank you in advance

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• How to update user info with restful_authentication plugin in Rails?

  - by benoror

  Hi people, I want to give the users to change their account info with restful_authentication plugin in rails. I added this two methods to my controller: def edit @user = User.find(params[:id]) end def update @user = User.find(params[:id]) # Only update password when necessary params[:user].delete(:password) if pàrams[:user][:password].blank? respond_to do |format| if @user.update_attributes(params[:user]) flash[:notice] = 'User was successfully updated.' format.html { redirect_to(@user) } format.xml { head :ok } else format.html { render :action => "edit" } format.xml { render :xml => @user.errors, :status => :unprocessable_entity } end end end Also, I copied new.html.erb to edit.html.erb. Considering that resources are already defined in routes.rb I was expecting it to work easily, bute somehow when I click the save button it calls the create method, instead of update, using a POST http request. Any ideas?

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• html post issue

  - by Amarsh

  i have the following html code : <FORM name=frmmail> <input id="dochtmlContent" type="hidden" name="dochtmlContent" value="oldValue"/> <script>document.dochtmlContent="newValue"</script> </FORM> and later on in a javascrip function (which is called upn submit): alert(document.dochtmlContent); document.frmmail.method = "post"; document.frmmail.ENCTYPE = "application/x-www-form-urlencoded"; document.frmmail.action = "/myServlet"; document.frmmail.submit(); Basically, I am declaring a hiden variable, changing its value and submitting it. The issue is, while I see an alert box displaying "newValue", when I submit it, my servlet recieves the "oldValue" for the dochtmlContent parameter. Can someone suggest whats wrong here.

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• Omniauth + Pow Issue

  - by neon

  I am having a strange issue with Pow and Omniauth. Omniauth (Facebook Login) works fine when using localhost:3000, but when using Pow (appname.dev) things get fishy. Users are taken through the redirect and properly created if they don't exist in the database, as they should be. After this, however, they are redirected to the root_path and not signed in. Their record is saved in the database as expected, but sign in does not occur. Again, this is only happening on Pow (and lvh.me), and not on localhost. Any ideas? I am using the Devise/Omniauth approach for sign-in, and the controller code looks like this: def facebook @user = User.find_for_facebook_oauth(request.env["omniauth.auth"], current_user) if @user.persisted? flash[:notice] = I18n.t "devise.omniauth_callbacks.success", :kind => "Facebook" sign_in_and_redirect @user, :event => :authentication else session["devise.facebook_data"] = request.env["omniauth.auth"] redirect_to new_user_registration_url end end Again, the user is persisted but there is no flash notice or sign_in that occurs when using POW.

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• Which Happens First? Anyone Know Exactly How The Apache Server Will Handle This Request?

  - by user310594

  Hello, To keep things simple, please allow the "assumption" that some code requires the use of a full URL, even though the domain is on the same server, i.e. a simple file path cannot be used. TCP/IP?? Question: If a form action target = "http://this-full-URL.com/postdata" (for example) and that URL is also on the same server, then which happens first? A) Data is sent "out onto the web", and then returns to the same server, or B) Before sending any (possibly sensitive) data, the server (Linux, Apache, PHP), first "discovers" the target address is local, so (clearly) no data is sent over the net? Thank you.

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• Ruby on Rails - Adding variable to params[]

  - by miligraf

  In the controller, how can I add a variable at the end of a params[]? If I try this I get an error: params[:group_] + variable How should it be done? Edit per request Ok, I have a form that sets groups of radio buttons with names like this: group_01DRN0 Obviously I have different groups in the form (group_01AAI0, group_01AUI0, etc.) and the value is set according to the radio button selected within the group: Radio button "group_01DRN0" could have value of "21" or "22" or "23", radio button "group_01AAI0" could have value of "21" or "22" or "23", etc. In the DB I have every code (01DRN0, 01AAI0, 01AUI0, etc) so I want to select them from DB and iterate in the params value so I can get the radio button group value, I've tried this with no luck: @codes=Code.get_codes for c in @codes @all=params[:group_] + c.name end Thanks.

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• How can I identifying control characters in Perl?

  - by sganesh

  I want to implement the command line features like in a linux terminal. I saw this in ftp command also. If I press tab I need to list the commands. If I press control characters I need to get that characters based on that I will do some action. And if I give any commands it should execute. For this I tried with Term::ReadKey that is in non-canonical mode. But here I am facing more problems like if I press any control character or arrow I got three characters. For the up arrow I got ASCII 27 91 65. Can anyone help me out of this problem?

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• cakePHP: Filter selected list by variable

  - by gonzela2006

  I'm on cakePHP 2. I have a problem and I need your help. Here is some code of my controller(StudentsController.php) specifically "edit" function: $students = $this -> Student -> find('list', array( 'order' => 'Student.name ASC' )); $this -> set('students', $students); How can I filter the list by the current student's class?? so the list will contain all students that has the same student's class I need some code like this $students = $this -> Student -> find('list', array( 'conditions' => array('Student.class_id' => CURRENT-STUDENT'S-CLASS), 'order' => 'Student.name ASC' )); $this -> set('students', $students); Please Advise Thanks, gonzela2006

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• nHibernate query by example with multiple associated objects

  - by BurnWithLife

  I'm trying to use nhibernate's query by example to build dynamic queries. I'm stuck on how to code for an example object with multiple associations. Here's an example from NHibernate in Action. Its a User object with Items. Example exampleUser = Example.Create(u).IgnoreCase().EnableLike(MatchMode.Anywhere); Example exampleItem = Example.Create(i).IgnoreCase().EnableLike(MatchMode.Anywhere); return GetSession().CreateCriteria(typeof(User)) .Add( exampleUser ) .CreateCriteria("Items") .Add( exampleItem ) .List<User>(); If the User object has let's say a Category object as a property, how could I add that in to the above example? If i put another CreateCriteria at the end it refers to the Items, not the User.

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• How do i style a JSON feed in my view?

  - by stephenmurdoch

  My rails app gets the following JSON feed from mixcloud and sticks the results into my index page At the moment when I do this, the entire contents of my feed are displayed unformatted in one big blob of scary looking text (without the curly JSON brackets) I only want to display specific values from the feed in the view. From the feed in question lets say for simplicity that I just wanted to display all values with a key of "url" In case I'm doing something wrong here's my code: # podcast controller def index # I'm using a class method to get the feed @feed = Podcast.feed end # podcast model def self.feed feed = JSON.parse(open("http://api.mixcloud.com/alivefrommaryhill/feed").read) end # index.html.haml .feed = @feed I can't figure out how to style the results and display only certain items from the feed. Is my approach wrong?

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• Stack recommendations for small/medium-sized web application in Python

  - by reto

  I'm looking for some recommendations for a python web application. We have some memory restrictions and we try to keep it small and lean. We thought about using WSGI (and a python webserver) and build the rest ourself. We already have a template engine we'd like to use, but we are open for some suggestions regarding the whole request handling (the controller). The application has to run in a single process and the requests have to be processed with multiple threads. We've looked at django, but we are a not sure if it fits into our memory budget. Your feedback is very welcome! Cheers, Reto

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• asp.net mvc custom model binding in an update entity scenario

  - by mctayl

  Hi I have a question about model binding. Imagine you have an existing database entity displayed in a form and you'd like to edit some details, some properties eg createddate etc are not bound to the form, during model binding, these properties are not assigned to the model as they are not on the http post data or querystrong etc, hence their properties are null. In my controller method for update , Id just like to do public ActionResult Update( Entity ent) { //Save changes to db } but as some properties are null in ent, they override the existing database fields which are not part of the form post data, What is the correct way to handle this? Ive tried hidden fields to hold the data, but model binding does not seem to assign hidden fields to the model. Any suggestions would be appreciated

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• Drawing information from relational databases in Rails

  - by Trip

  I am trying to pull the name of the Artist from the Albums database. These are my two models class Album < ActiveRecord::Base belongs_to :artist validates_presence_of :title validates_length_of :title, :minimum => 5 end class Artist < ActiveRecord::Base has_many :albums end And here is the Albums Controller def index @ albums = Album.all respond_to do |format| format.html # index.html.erb format.xml { render :xml => @albums } end end And the View from the index: <% @albums.each do |album| %> <tr> <td><%=h album.id %></td> <td><%=h album.title %></td> <td><%=h album.artist.name %></td> </tr <% end %> My end result html is coming out like this for the artist field! # and if i set it to artist.name I get this: undefined method `name' for nil:NilClass

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