ruby-on-rails-3

问题 I understand how to add one javascript file to rails assets pipeline. Just add //= require filename to application.js But how can I include many javscripts files under one folder vendor/assets/javascripts/<js_library> Or I have to list them all explicitly ? 回答1: //= require_tree . will require everything in the current directory of your application.js //= require_tree ./js_library will require everything in the js_library subdirectory if it is under app/assets/javascripts If you are are

问题 Plugins: Thumbs Up & JQuery 1.5.2 (needed for another old gem) I'm trying to render an updated vote count w/o a full HTTP request when a user votes on a post. Currently, it refreshes the page on every vote. Posts Controller def vote_up post = Post.find(params[:id]) current_user.vote_exclusively_for(post) respond_to do |format| format.js format.html {rRedirect_to :back} end end def vote_down post = Post.find(params[:id]) current_user.vote_exclusively_against(post) respond_to do |format| format

问题 I want to have the Seeds.rb file run a method in a file from the Rails.root.join('spec') directory which will fill the database with data generated by FactoryGirl. Lets call this file "helpers.rb" with the method "seed_data" Edit: require Rails.root.join('spec','helpers.rb') links the file. source This method I want to use in a before(:all) do seed_data end to seed the test database and rake db:seed for development/production databases with the same effect. 回答1: Seeds.rb require Rails.root

问题 I can't figure out how to upgrade this code from Rails 2 to Rails 3: <% remote_form_for(item, :update => 'div_id') do |f| %> ... I tried this: <%= form_for :item, :remote => true, :url => { :controller => "items", :action => "create" }, :update => 'div_id' do |f| %> ... It creates the new item but it fails in updating the content within <div id="div_id"></div> tags. It seems Rails 3 no longer supports the " :update " option for a remote form_for . Any suggestion? 回答1: You could use RJS, but

问题 I'm new to programing and rails and I'd like to create a copy of a rails app I'm working with to harmlessly try out some things. Is there an easy way to make that happen? 回答1: Yes you can. These commands weren't obvious to a newbie like me and may help someone else... First, depending on what you plan on calling your new deployed app, find a name that is currently available on heroku. From root of old and to be created new rails app: $ cp -R old_directory new_directory $ cd new_directory $ rm

问题 In config/routes.rb: resources :posts do resources :comments end resources :pictures do resources :comments end I would like to allow for more things to be commented on as well. I'm currently using mongoid (mongomapper isn't as compatible with Rails 3 yet as I would like), and comments are an embedded resource (mongoid can't yet handle polymorphic relational resources), which means that I do need the parent resource in order to find the comment. Are there any elegant ways to handle some of

问题 I have seen a lot of questions about this topic, but a lot of them have contradictory information, and for some reason it didnt work for me. I have: a top level domain: i.e. lvh.me (development). each user has subdomains: i.e. userdomain.lvh.me The login form is in the top level domain: lvh.me I want: If an user logs in, the session needs to be shared between all the subdomains. I mean, the session needs to be active in lvh.me:3000/something and userdomain.lvh.me:3000 If an user logs out from

问题 Hey, how do I set a scope in rails 3 to todays records? This doent work, yet. I get no data. class MyModel < ActiveRecord::Base scope :today, :conditions => { :created_at => Date.today } end 回答1: Since "created_at" column contains date and time, but you need compare only date, you have two ways (I assume you use MySQL) : use BETWEEN : scope :today, lambda { WHERE("created_at BETWEEN '#{DateTime.now.beginning_of_day}' AND '#{DateTime.now.end_of_day}'") } use DATE() function: scope :today,

问题 I have a simple Rails application I want to deploy to Heroku. When I run the below command git push heroku master The below error message is displayed. Could not find multi_json-1.3.1 in any of the sources ! ! Failed to install gems via Bundler. ! ! Heroku push rejected, failed to compile Ruby/rails app Here is my Gemfile gem 'rails', '3.2.3' gem 'pg' group :assets do gem 'sass-rails', '~> 3.2.3' gem 'coffee-rails', '~> 3.2.1' gem 'therubyracer', :platform => :ruby gem 'uglifier', '>= 1.0.3'

问题 I have a gem, that must be build with some options. gem install pg --with-pg-include=/Library/PostgreSQL/9.0/include/ --with-pg-lib=/Library/PostgreSQL/9.0/lib/ Can I include this options in the Gemfile? In my Gemfile the pg command is gem "pg", "0.12.2" I want to provide some options after the version number. thx, tux 回答1: Here is the relevant text from the link posted in comments already: BUILD OPTIONS You can use bundle config to give bundler the flags to pass to the gem installer every