ruby-on-rails-3.1

I stumbled upon a wonderful article about scopes on Rails 3+ : http://edgerails.info/articles/what-s-new-in-edge-rails/2010/02/23/the-skinny-on-scopes-formerly-named-scope/index.html You can read there (in 'Crazy Town' section) that it's possible to merge scopes from different models like this : class User < ActiveRecord::Base scope :published, lambda { joins(:posts).group("users.id") & Post.published } end which works just as expected, and allows you to do : User.published.to_sql #=> SELECT users.* FROM "users" # INNER JOIN "posts" ON "posts"."author_id" = "users"."id" # WHERE (posts

I just pushed an app to a production Heroku environment. Basically there is a Bus model and it has a seats attribute class Bus < ActiveRecord::Base attr_accessible :seats, # other attributes end Now I have a JavaScript frontend which POST's JSON for new buses to the buses#create action. ActiveRecord keeps encountering an error when I try to create a bus: : POST www.busables.com/buses dyno=web.1 queue=0 wait=5ms service=65ms status=500 bytes=728 : : ActiveRecord::UnknownAttributeError (unknown attribute: seats): : app/controllers/buses_controller.rb:31:in `new' : app/controllers/buses

I have organized my javascript files in a couple of directories and I have found the following strange behavior. Given the following tree: + app + assets + javascripts + common + public + common + home - home.js home.js looks like this: //= require jquery //= require jquery_ujs //= require jquery-ui //= require_directory ../../jquery_plugins //= require_directory ../../common //= require_directory ../common //= require_self Now the trick lies in the jquery_plugins directory. I placed this inside vendor/assets/javascripts (which is included in the asset load path, when I check Rails.application

I have a form, that I send with using AJAX. The form is in the FirstsController . I need the form send to SecondsController . The form is sent and data saved. Then I wanna change the form by a text, I try to do by this way: def create ...saving... respond_to do |format| format.js { render :update do |page|; page << "$('#id_element').html('hellllloooooo');" end } format.html {} end end And I ma getting this error: ActionView::MissingTemplate (Missing template seconds/update, application/update with {:handlers=>[:erb, :builder, :coffee], :formats=>[:js, :html], :locale=>[:en, :en]}.): How should

When I start up rails in production mode, it precompiles all the assets but is unable to serve the application.css asset. I looked in public/assets and the precompiled application.css exists. However, I get a 404 whenever I try to access it from the page. These are the instructions I use to launch the server, if that may help at all. RAILS_ENV=production bundle exec rake assets:clean RAILS_ENV=production bundle exec rake assets:precompile rails -e production If you want Rails to serve the static assets you have add the following line to your production.rb: config.serve_static_assets = true I

I have two select fields in a form. Every time one of these select fields change value, the rest of the form should be changed. I used the following code for the select fields: <%= f.collection_select :model1, Model1.all, :id, :name, "data-remote" => true, "data-url" => "/model3/get_rest_form" %> <%= f.collection_select :model2, Model2.all, :id, :name, "data-remote" => true, "data-url" => "/model3/get_rest_form" %> The problem now is that the model3 controller needs the values of both select fields in order to formulate a response to the Ajax request sent to it, but it only gets the value of