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• Autocomplete in Textmate

  - by Elliot

  Sometimes I watch screen casts where someone is using text mate. I'm a rails developer, so these are rails screen casts. They'll type something like: def for example and "end" will automatically appear underneath. I do have the bundle for Rails enabled - why doesn't this happen for me? Thanks!

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• Best way to implement voting in a Rails application?

  - by Horace Loeb

  What's the best plugin these days for implementing voting on a Rails site? Two I'm aware of are: vote_fu acts_as_voteable

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• globalize2 with xml/json support

  - by Philipp Bolliger

  I'm implementing a distributed application, server with rails and mobile clients in objective c (iPhone). To enable internationalization, I use the rails plugin 'globalize2' by joshmh. However, it turned out that this plugin does not translate attributes when calling to_xml or to_json on an ActiveRecord. Does anyone know of a workaround / patch? Do you have any ideas how to fix this, where to alter globalize2? Using: Rails 2.3.5 globalize2: commit from 2010-01-11

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• How can I marshal a hash with arrays?

  - by tuner

  What should I do to marshal an hash of arrays? The following code only prints {}. s = Hash.new s.default = Array.new s[0] << "Tigger" s[7] << "Ruth" s[7] << "Puuh" data = Marshal.dump(s) ls = Marshal.restore( data ) p ls If the hash doesn't contain an array it is restored properly.

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• Best way to associate phone numbers with names

  - by Horace Loeb

  My application stores lots of its users friends' phone numbers. I'd like to allow users to associate names with these phone numbers, but I don't want to make users manually type in names (obviously). I'm curious what the best overall approach is here, as well as the best way to implement it Overall approach-wise, I imagine using Gmail / Yahoo / Windows Live contacts is best (the Facebook API doesn't let you access phone numbers), though the gems I've found for interacting with these contacts APIs (this and this) only give you access to the names and email addresses of each contact.

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• rails db:seed no method error

  - by louddwarf

  when I try and run the "rake db:seed" command the rails console outputs "NoMethodError: undefined method `db' for #" not quite sure what going on. I'm using netbeans to build my rails project which is using the built-in JRuby 1.2 would that have anything to do with it?

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• Multiple Rails forks with separate designs and layouts

  - by mettadore

  I have a Rails project that is basically a simple web app for a membership-based organization. We've open sourced the code on Github for the web app so that others can use it, but have a licensed design/layout that the original organization is going to use. This layout cannot be open sourced. I was wondering if others have run into the situation where you have an open-source Rails app with a non-OS design. My initial thought is to put app/views in .gitignore, and to have anyone forking the code add their own views directory, perhaps including an app/views_default directory with a web-app-theme layout or something else to get people running. Is this the best option (realizing that there are other files such as JavaScript, CSS, etc that come with the layout that must also be ignored). Does anyone have some good thoughts or pointers on this?

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• has_many through and partials

  - by user307428

  I have a User model, a Post model, and an Interest model. Using User has_many posts through interests Using User has_many interests Using Post has_many users through interests Using Post has_many interests Using Interest belongs to Post Using Interest belongs to User Application_Controller is as follows: class ApplicationController < ActionController::Base before_filter :login_from_cookie before_filter :find_user_interests helper :all # include all helpers, all the time session :session_key = '_blah_session' include AuthenticatedSystem def find_user_interests @user_interests = current_user ? current_user.interests : [] true end Application.html.erb has as follows: <%= render :partial = "users/interests", :object = @user_interests % _interests.html.erb partial is as follows: ul <% unless current_user.nil? then -% <% @user_interests.each do |interest| -% li<%= interest.post.title %/li <% end % <% end -% /ul Given all this when I at localhost:3000/posts/1 my partial shows up fine, but when in localhost:3000/posts I get an error "undefined method `title' for nil:NilClass" thus an error in the line li<%= interest.post.title %/li shown above in the _interests.html.erb partial. What the heck would be the issue? TIA end

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• Write XML File from a flex application back to a rails Server

  - by Markus

  Hi everybody, I have a XML-file, which I want to send to a rails server. To do so I use the following code: <mx:HTTPService id="dataService" result="resultHandler(event)" resultFormat="e4x"/> In a Function triggered by a save button, I do the following: var params:Object = {}; params["xml_file"] = xmlDoc; dataService.method = "POST"; dataService.url = "http://localhost:3000/containers"; dataService.send(params); Unfortunately there is always the Problem (see below) appearing. If I remove the params var, it runs a GET Request... [RPC Fault faultString="HTTP request error" faultCode="Server.Error.Request" faultDetail="Error: [IOErrorEvent type="ioError" bubbles=false cancelable=false eventPhase=2 text="Error #2032: Stream-Fehler. URL: http://localhost:3000/containers"]. URL: http://localhost:3000/containers"] what could be the problem? Thanks for any hints! Markus

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• Rails STI validation inheritance

  - by KARASZI István

  Dear Rails users! I have STI models in my Rails application. The ancestor model has validations with the validates_... methods which are working fine. But I have custom validations as well, and I would like to add more different custom validations in the descendants. These custom validations would depend on the class. If I write class DescendantA < Ancestor protected def validate # ... end end It simply overwrites the original validations. Is there a convention to do this in Rails?

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• How can I call `update_attribute` for a list item in rails then actually update the html using jquery?

  - by Patrick Connor

  I want my users to be able to mark one or more items from an index view as "Active" or "Inactive" using a link. The text for the link should be state aware - so it might default to "Mark as Active" if the corresponding attribute was false or null, and "Mark as Inactive" if true. Once the user clicks the link and the attribute is updated in the controller, the link-text should update based on the new state. I am WAY off here, but this is a small sample of the code I have been trying... CONTROLLER ... respond_to :html, :js ... def update @item = Item.find(params[:id]) if @item.update_attributes(params[:item]) #Not sure of how to respond to .js here end end ... update.js.erb #how do I identify which element to update? $('#item[13456]').html("State aware text for link_to") VIEW - for item in @items = item.name = link_to "Mark as Active", item_path(item), :method => :put, :remote => true. :id => "item[#{item.id}]" I am happy to read any APIs, blogs, tutorials, etc. I just can't seem to get my hands/mind around this task. Any help or guidance is greatly appreciated!

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• How can I prevent double file uploading with Amazon S3?

  - by Tony

  I decided to use Amazon S3 for document storage for an app I am creating. One issue I run into is while I need to upload the files to S3, I need to create a document object in my app so my users can perform CRUD actions. One solution is to allow for a double upload. A user uploads a document to the server my Rails app lives on. I validate and create the object, then pass it on to S3. One issue with this is progress indicators become more complicated. Using most out-of-the-box plugins would show the client that file has finished uploading because it is on my server, but then there would be a decent delay when the file was going from my server to S3. This also introduces unnecessary bandwidth (at least it does not seem necessary) The other solution I am thinking about is to upload the file directly to S3 with one AJAX request, and when that is successful, make a second AJAX request to store the object in my database. One issue here is that I would have to validate the file after it is uploaded which means I have to run some clean up code in S3 if the validation fails. Both seem equally messy. Does anyone have something more elegant working that they would not mind sharing? I would imagine this is a common situation with "cloud storage" being quite popular today. Maybe I am looking at this wrong.

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• packaging jruby script into jar with all dependencies ?

  - by Kim Jong Woo

  is there any way to make my currently jruby script into a standalone single executable like jar or exe ?

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• Rails architecture questions

  - by justinbach

  I'm building a Rails site that, among other things, allows users to build their own recipe repository. Recipes are entered either manually or via a link to another site (think epicurious, cooks.com, etc). I'm writing scripts that will scrape a recipe from these sites given a link from a user, and so far (legal issues notwithstanding) that part isn't giving me any trouble. However, I'm not sure where to put the code that I'm writing for these scraper scripts. My first thought was to put it in the recipes model, but it seems a bit too involved to go there; would a library or a helper be more appropriate? Also, as I mentioned, I'm building several different scrapers for different food websites. It seems to me that the elegant way to do this would be to define an interface (or abstract base class) that determines a set of methods for constructing a recipe object given a link, but I'm not sure what the best approach would be here, either. How might I build out these OO relationships, and where should the code go?

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• What would you use for auto completion in Rails app?

  - by Andrei

  I want to use auto-completion in a number of fields (5-7) in my forms. There is a screencast on auto-completion with Prototype library by Ryan Bates ( http://railscasts.com/episodes/102-auto-complete-association). On the other hand, I have noticed that quite many guys suggest jQuery for this task ( http://jquery.bassistance.de/autocomplete/demo/). And I guess, there was probably some development last year(s), so I ask you - what would you use nowadays to auto-complete your form fields and why? BTW, I still have an open question on auto completion for HABTM association: http://stackoverflow.com/questions/1510935/how-to-do-habtm-management-with-auto-completion-in-rails

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• How to set the URL of a link to a variable using WATIR

  - by Alex

  Using WATIR and Excel, I'd like to take the first row of a table in Excel, visit the URL, then set the 12th link on the page as a variable in the cell next to the cell with the URL, then go to the next line and repeat. I'm stuck on getting the URL of the 12th link on the page to set as a variable that I can feed into the next cell in Excel. Here's what I have and it's not working. worksheet = workbook.WorkSheets(1) # get first workbook #declare test site test_site = worksheet.Range("a2").text #open ie ie = Watir::IE.new #go to test_site ie.goto test_site #find primlink ie.link(:index, 12).text = "primlink" puts primlink Any ideas?

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• Is DOM not being loaded ?

  - by Daniel

  I went through episode 88 (Dynamic menus) of the railscasts and when I try to load my *js.erb file in the browser shows me that my fetched data from the controller is getting there Controller def dynamic_departments @departments = Department.all end localhost:3000/javascripts/dynamic_departments.js var departments = new Array(); departments.push(new Array(1,'????',1)); departments.push(new Array(2,'???-???',2)); function facultySelected(){ faculty_id = $('falculty_id').getValue(); options = $('department_id').options; options.length = 1; departments.each(function(department){ if(department[0] == faculty_id){ options[options.length] = new Option(department[1],department[2]) } }); if(options.length == 1){ $('department_field').hide(); } else { $('department_field').show(); } } document.observe('dom:loaded', function(){ alert("DOM loaded"); //$('department_field').hide(); //$('faculty_id').observe('change',facultySelected); }); My routes.rb has the match ':controller/:action.:format' Still...after the page's loaded and I change the value of my collection_select or select nothing happens.What am I missing? *I called the 'alert' and commented the rest to test it....still nothing.

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• Rails form helpers: how to add an element to a collection?

  - by Laran Evans

  I have a keychain object. keychain has_many credentials. I'm trying to write the view code to add a new credential to a keychain. This is the code I have: <% form_for(@keychain) do |f| % <tr <td<%= f.select "credentials[]", current_account.services.collect{ |s| [s.friendly_name, s.id] } %</td <td<%= f.text_field 'credentials', :username %</td <td<%= f.password_field 'credentials', :password %</td </tr <% end % But it fails with this message: NoMethodError in Keychains#new Showing app/views/keychains/_keychain_form.html.erb where line #32 raised: undefined method `credentials[]' for # What am I doing wrong?

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• Creating relationship between two model instances

  - by Lowgain

  This is probably pretty simple, but here: Say I've got two models, Thing and Tag class Thing < ActiveRecord::Base has_and_belongs_to_many :tags end class Tag < ActiveRecord::Base has_and_belongs_to_many :things end And I have an instance of each. I want to link them. Can I do something like: @thing = Thing.find(1) @tag = Tag.find(1) @thing.tags.add(@tag) If not, what is the best way to do this? Thanks!

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• Read from params[] in Rails

  - by Adnan

  Hi, I use: <%= select( "payment", "id", { "Visa" => "1", "Mastercard" => "2"}) %> and I get this in HTML <select id="payment_id" name="payment[id]"><option value="2">Mastercard</option> <option value="1">Visa</option></select> now how can I read the payment[id] with params[], if I use params[payment[id]] I get an error.

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• how to add a new value to a dropdown list in Rails

  - by LearnRails

  In my item table, I have a itemname column which is currently a dropdown list taking values from DB. <%= select 'item','itemname' , Item.find(:all).collect{|c| [c.itemname]},{:include_blank = 'Select Name'} How can I add a new value to this dropdown list through the application. Is there a provision to directly add value to the list? Thanks

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• how to model editing of multiple related resources on the same webpage?

  - by amikazmi

  Lets say we have a Company model, that has many Employees And has many Projects If we want to show the projects, we'll go to "/company/1/projects/index" If we want to edit 1 project, we'll go to "/company/1/projects/1/edit" What if we want to edit all the projects at once on the same webpage? We can go to "/company/1/edit" and put a nested forms for all the projects But what if we need a different webpage to edit all the employees at once too? We can't use "/company/1/edit" again.. Right now we do "/company/1/projects/multiedit", "/company/1/projects/multupdate"- but as you can see, it's not rest. How can we model this restfully?

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• Why is rails setting ":null => false" on all my columns in schema.rb?

  - by ryeguy

  Even if I never specify :null => false in my migrations that initially add columns to tables, rails still generates code in schema.rb that specifies the columns as having :null => false. Why is this? If I develop on my box, and then use rake db:schema:load on my production box, I'm going to get very different behavior! Edit: Even if I delete schema.rb and run rake db:schema:dump, it still puts :null => false on the new schema even if it isn't defined like that in the actual database. It seems it can't tell whether or not a column is marked as allowing nulls. I'm using SQLite if that helps.

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• Custom accessor for array element

  - by memph1s

  I'm trying to create an accessor for one element from array with specific flag set to true: class EntranceObject < ActiveRecord::Base has_many :subscribers def customer self.subscribers.find(:first, :conditions => {:is_customer => true}) end def customer=(customer_params) self.subscribers << Subscriber.new(:name => customer_params[:name], :apartment => customer_params[:apartment], :phone_number => customer_params[:phone_number], :is_customer => true) end end class Subscriber < ActiveRecord::Base belongs_to :entrance_object validates_presence_of :name, :apartment end How do i need to validate this accessor in order to hightlight missing fields in a view? P.S. I'm newbie in RoR, maybe there is another approach to such work with one element from a collection? Thanks.

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• Form is creating already loaded attributes in addition to new attributes, how do I ignore the first?

  - by looloobs

  In my application you: Have an admin user that signs on and that user has a role (separate model), then I use the declarative_authorization plugin to give access to certain areas. That admin user can also register new users in the system, when they do this (using Authlogic) they fill out a nested form that includes that new users' role. So what is happening is the role of the admin user is being loaded by the declarative_authorization and then the nested form using the has_many_nested_attributes is loading that existing role as well as the new role for the new user (users can have many roles). Is there some way I can tell the new User being created to ignore the role assigned to the current_user and only create the role in the form for the new user? I have looked through a lot of different things, but it seems to get more complicated that these are nested attributes. Thanks in advance.

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