[rails]建置MongoDB環境利用mongoid

之前用了mongo_mapper感覺很好用，不過發現要裝一些plugin的時候，像是desice時，就會有一些問題的存在，所以我改用mongoid來使用，比較順許多，而且不用在rails g model XXX --orm==mongo_mapper之類的。

用gem 安裝

Gemfile

gem "mongoid", "~> 2.3"
gem "bson_ext", "~> 1.4"
gem 'devise'

$ bundle install

產生資料庫設定檔

$ rails g mongoid:config

config/mongoid.yml

development:
  host: localhost
  database: demo3_development

test:
  host: localhost
  database: demo3_test

# set these environment variables on your prod server
production:
  host: <%= ENV['MONGOID_HOST'] %>
  port: <%= ENV['MONGOID_PORT'] %>
  username: <%= ENV['MONGOID_USERNAME'] %>
  password: <%= ENV['MONGOID_PASSWORD'] %>
  database: <%= ENV['MONGOID_DATABASE'] %>
  # slaves:
  #   - host: slave1.local
  #     port: 27018
  #   - host: slave2.local
  #     port: 27019

修改 config/application.rb

vim /config/application.rb

config/application.rb

require "action_controller/railtie"
require "action_mailer/railtie"
require "active_resource/railtie"
require "rails/test_unit/railtie"
#把rails/all前面加上#
#require 'rails/all'

產生devise設定檔

$ rails g devise:install

config/application.rb

  create  config/initializers/devise.rb
  create  config/locales/devise.en.yml

===============================================================================

Some setup you must do manually if you haven't yet:

  1. Setup default url options for your specific environment. Here is an
 example of development environment:

   config.action_mailer.default_url_options = { :host => 'localhost:3000' }

 This is a required Rails configuration. In production it must be the
 actual host of your application

  2. Ensure you have defined root_url to *something* in your config/routes.rb.
 For example:

   root :to => "home#index"

  3. Ensure you have flash messages in app/views/layouts/application.html.erb.
 For example:

   <p class="notice"><%= notice %></p>
   <p class="alert"><%= alert %></p>

  4. If you are deploying Rails 3.1 on Heroku, you may want to set:

   config.assets.initialize_on_precompile = false

 On config/application.rb forcing your application to not access the DB
 or load models when precompiling your assets.

===============================================================================

$ rails g devise User

建立一個鷹架

$ rails g scaffold board name:string

修改加入root :to

vim config/routes.rb

config/routes/rb

root :to => "boards#index"

刪除預設首頁

rm public/index.html

增加使用者管理至主版頁面

vim app/views/layouts/application.html.erb

將下面這個介面放在<%= yield %>上面

app/views/layouts/application.html.erb

<% if user_signed_in? %>
<ul>
 <li>
  <%= link_to('Edit registration', edit_user_registration_path) %>
  </li>
  <li>
  <%= link_to('Logout', destroy_user_session_path, :method => :delete) %>        
  </li>
</ul>
<% else %>
<ul>
  <li>
  <%= link_to('Login', new_user_session_path)  %>  
  </li>
  <li>
  <%= link_to('Register', new_user_registration_path)  %>
  </li>
</ul>
<% end %>