ruby-on-rails-3.1

问题 I am trying to get a CoffeeScript class to extend a Backbone.Model. I built a brand new rails 3.1 app, created a scaffold of 'Stone', with 3 attributes, and patched a snippet of the Todos.coffee example into stones.js.coffee. I have both backbone.js and underscore.js in the app/assets/javascripts folder. When I run this under the Chrome Java console, I get the message above in the console log. Any ideas? Actual code follows: $ -> class Todo extends Backbone.Model # Default attributes for the

问题 I'm having some trouble creating functions with CoffeeScript, I guess I've missed something. For my users controller I'd like to create client-side validation for a signup form. I think I've missed something fundamental with how this all works. <%= form_for @user, :html => {:onsubmit => "return validate_signup_form();"} do |f| %> CoffeeScript ( assets/users.js.coffee ): validate_signup_form = () -> alert "Hi" return false Expected output: var validate_signup_form; validate_signup_form =

问题 I m working on rails project and i m new on rails and I want to test my model relationships and methods in model using rspec. How could I do this my model relationships are like this class Idea < ActiveRecord::Base belongs_to :person belongs_to :company has_many :votes validates_presence_of :title, :description def published? if self.status == "published" return true else return false end end def image_present if self.image_url return self.image_url else return "/images/image_not_found.jpg"

问题 What is the Rails 3.1 of writing the code below: named_scope :min_2_items_last_90_days, { :include => { :orders => :order_items }, :conditions => ['orders.created_at >= ?', 90.days.ago], :group => 'people.id', :having => 'COUNT(order_items.id) >= 2' } 回答1: While writing it as scope :min_2_items_last_90_days, where(...) is syntactically correct, it probably (like your original code) doesn't do quite what you think. In both cases the 90.days.ago is evaluated once only, when the class is loaded,

问题 I want to use node.js with my Rails-Project to serve asynchronous io. I don't want to use juggernaut, faye or something like this, because I need clean connections with web-socket, server-sent events and spdy without an alternative. My first try to use node.js is now to use Socket.io, just to get in use with serving data to a node.js-module with JavaScript. But it doesn't work at all. My application.js looks like this: // This is a manifest file that'll be compiled into including all the

问题 The codebase I'm working on was recently upgraded from Ruby 1.9.2 to Ruby 1.9.3 and from Rails 3.1 to Rails 3.2.2. Since I'm using RVM I simply did rvm install 1.9.3 which I would have expected to be all that was necessary. When I run rails s I get the error [BUG] cross-thread violation on rb_gc() I've found a number of links relating to this problem. There is one on StackOverflow, but it doesn't really give an answer. The most promising answer is on the RVM site: In every case of this I have

问题 I recently set up a Cedar (Rails 3.1) app on Heroku, and to run, for example, a migration, you'd do heroku run rake db:migrate I learned that it's good practice to use "bundle exec" before any rake command (as Katz says http://yehudakatz.com/). So, I thought perhaps the following is actually better practice: heroku run bundle exec rake db:migrate But to reduce verbosity, is it alright to use the former command, or is the one with bundle exec critical? 回答1: On Heroku when the slug is compiled

问题 I copied config/environments/development.rb to config/environments/ci.rb. When I run with RAILS_ENV=development, the asset search path includes my gem vendor directories, in particular for jquery-ui-rails. However, when I run with RAILS_ENV=ci it does not. From the console, Rails.application.config.assets.paths evaluates to the following with development irb(main):002:0> Rails.application.config.assets.paths => ["/var/www/ci/conflux/app/assets/images", "/var/www/ci/conflux/app/assets

问题 I'm updating my rails 2 apps to rails 3 and find that the use of 'render :text' does not behave the same anymore. @results is an array. In my controller: render :text => "<ul>#{@results}</ul>" It's returning the whole array as a string rather than iterating through each value: <ul> [" <li>Steve</li> ", " <li>John</li> "] </ul> Worked fine in Rails 2.x but not in 3. How do I fix this? I'm expecting a result of: <ul> <li>Steve</li> <li>John</li> </ul> 回答1: I know this question is for Rails 3.1

问题 I am a rails newbie. I am trying to implement acts-as-taggable-on on my sample app. I am able to enter multiple tags using tag_list but facing issues searching them. This is what I got. I used scaffold User to generate the controller & model. class CreateUsers < ActiveRecord::Migration def change create_table :users do |t| t.string :name t.text :tags t.timestamps end end end My User Model is class User < ActiveRecord::Base serialize :tags acts_as_taggable_on :tags scope :by_join_date, order(