ruby-on-rails-3

问题 I added the composite_primary_keys gem in my Gemfile. On local environment it runs fine, but on a centos machine it breaks with the following error. Ruby version is 1.9.2p290 and rubygems version is 1.3.7 on both environments. Does anyone know why that could be? bundle exec rake db:create --trace no such file to load -- active_record/associations/has_and_belongs_to_many_association /var/tmp/jenkins/gem_cache/myapp/gems/activesupport-3.1.3/lib/active_support/dependencies.rb:240:in `require'

问题 I got this very confusing array of hashes as an API response. http://jsfiddle.net/PP9N5/ ( the full response is massive. Posting only a part of it but it covers all elements of the response) How can I get to "airlines". I tried this <% @flight["air_search_result"]["onward_solutions"]["solution"].each do|h| %> <strong><%=h["pricing_summary"]["total_fare"] %></strong> - <% h["flights"]["flight"]["segments"]["segment"].each do |s| %> <%= s['airline'] %> <% end %> <br> <hr> <% end %> And I get

问题 I have a Rails 3.1 app running in production using Nginx and Unicorn. And for some reason, my custom 404 and 500 html error pages are not showing. Instead I'm getting the actual error message ("Routing Error", for example). In my production.rb file, I have config.consider_all_requests_local = false And on the same server with a nearly identical configuration, I have a 'staging' site that works just fine. The only difference, as far as I can tell, is that the production one has SSL while the

问题 I am getting error in rails - Faraday::Error::ConnectionFailed. I am trying RailsCast Omniauth Episode. It's working fine with Twitter. But when I give http://localhost:3000/auth/facebook it's giving error. I have also see question, but problem not solved. Settings on developer.facebook.com Site URL: http://localhost:3000/ Site Domain: localhost I am using windows. I have also read question. Thanks! 回答1: I have solved this problem. This problem might be for windows users only. Use this, 1

问题 I am getting error in rails - Faraday::Error::ConnectionFailed. I am trying RailsCast Omniauth Episode. It's working fine with Twitter. But when I give http://localhost:3000/auth/facebook it's giving error. I have also see question, but problem not solved. Settings on developer.facebook.com Site URL: http://localhost:3000/ Site Domain: localhost I am using windows. I have also read question. Thanks! 回答1: I have solved this problem. This problem might be for windows users only. Use this, 1

问题 this is my view: @bulk_objects.each do |bulk_warehouse| bulk_error = @wh_errors[:"bulk_warehouse#{@count}"] if @wh_errors -%> <tr class="<%= cycle("odd", "even") %>"> <%= hidden_field_tag("bulk_warehouse_id#{@count}",bulk_warehouse.id) %> <td><%= text_field_tag("bulk_warehouse_asset#{@count}", bulk_warehouse.asset, :disabled => true)%></td> <td><%= text_field_tag("bulk_warehouse_serial#{@count}", bulk_warehouse.serial, :disabled => true) %></td> <td><%= check_box_tag "enable_record#{@count}"

问题 this is my view: @bulk_objects.each do |bulk_warehouse| bulk_error = @wh_errors[:"bulk_warehouse#{@count}"] if @wh_errors -%> <tr class="<%= cycle("odd", "even") %>"> <%= hidden_field_tag("bulk_warehouse_id#{@count}",bulk_warehouse.id) %> <td><%= text_field_tag("bulk_warehouse_asset#{@count}", bulk_warehouse.asset, :disabled => true)%></td> <td><%= text_field_tag("bulk_warehouse_serial#{@count}", bulk_warehouse.serial, :disabled => true) %></td> <td><%= check_box_tag "enable_record#{@count}"

问题 The following code results in an error Example 1 if params[:id] == '2' || params.has_key? :id abort('params id = 2 or nothing') end syntax error, unexpected tSYMBEG, expecting keyword_then or ';' or '\n' if params[:id] == '2' || params.has_key? :id However, switching the conditional statements || adding parentheses works 100%. Example 2 if params.has_key? :id || params[:id] == '2' abort('params id = 2 or nothing') end Example 3 if (params[:id] == '2') || (params.has_key? :id) abort('params id

问题 The following code results in an error Example 1 if params[:id] == '2' || params.has_key? :id abort('params id = 2 or nothing') end syntax error, unexpected tSYMBEG, expecting keyword_then or ';' or '\n' if params[:id] == '2' || params.has_key? :id However, switching the conditional statements || adding parentheses works 100%. Example 2 if params.has_key? :id || params[:id] == '2' abort('params id = 2 or nothing') end Example 3 if (params[:id] == '2') || (params.has_key? :id) abort('params id

问题 rails 3: include_root_in_json = true allows to have a root property for json response. But it doesn't work with array of object, there is a property like include_root_in_array_json? actually I have this response: [ {"model": {"a":"a_value"}}, {"model": {"b":"b_value"}}] but I want a response like that: {"models":[ {"model": {"a":"a_value"}}, {"model": {"b":"b_value"}}]} xml response has a root property 'models' which include the array, but json not... 回答1: You can try: {models: Model.all}.to