新建项目

rails new mongoid_app --skip-active-record --skip-test-unit --skip-bundle

      create

      create  README.rdoc

      create  Rakefile

      create  config.ru

      create  .gitignore

      create  Gemfile

      create  app

      create  app/assets/javascripts/application.js

      create  app/assets/stylesheets/application.css

      create  app/controllers/application_controller.rb

      create  app/helpers/application_helper.rb

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

      create  app/assets/images/.keep

      create  app/mailers/.keep

      create  app/models/.keep

      create  app/controllers/concerns/.keep

      create  app/models/concerns/.keep

      create  bin

      create  bin/bundle

      create  bin/rails

      create  bin/rake

      create  config

      create  config/routes.rb

      create  config/application.rb

      create  config/environment.rb

      create  config/environments

      create  config/environments/development.rb

      create  config/environments/production.rb

      create  config/environments/test.rb

      create  config/initializers

      create  config/initializers/backtrace_silencers.rb

      create  config/initializers/filter_parameter_logging.rb

      create  config/initializers/inflections.rb

      create  config/initializers/mime_types.rb

      create  config/initializers/secret_token.rb

      create  config/initializers/session_store.rb

      create  config/initializers/wrap_parameters.rb

      create  config/locales

      create  config/locales/en.yml

      create  config/boot.rb

      create  db

      create  db/seeds.rb

      create  lib

      create  lib/tasks

      create  lib/tasks/.keep

      create  lib/assets

      create  lib/assets/.keep

      create  log

      create  log/.keep

      create  public

      create  public/.html

      create  public/.html

      create  public/.html

      create  public/favicon.ico

      create  public/robots.txt

      create  tmp/cache

      create  tmp/cache/assets

      create  vendor/assets/javascripts

      create  vendor/assets/javascripts/.keep

      create  vendor/assets/stylesheets

      create  vendor/assets/stylesheets/.keep

修改Gemfile

source 'https://rubygems.org'

# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'

gem 'rails', '4.0.2'

gem 'bson_ext'

gem 'mongo'

gem 'mongoid', github: 'mongoid/mongoid'

# Use SCSS for stylesheets

gem 'sass-rails', '~> 4.0.0'

gem 'uglifier', '>= 1.3.0'

gem 'coffee-rails', '~> 4.0.0'

gem 'jquery-rails'

gem 'turbolinks'

gem 'jbuilder', '~> 1.2'

group :doc do

  gem 'sdoc', require: false

end

运行bundle install

bundle install

Updating git://github.com/mongoid/mongoid.git

Fetching gem metadata from https://rubygems.org/...........

Fetching additional metadata from https://rubygems.org/..

Resolving dependencies...

Using rake (10.1.)

Using i18n (0.6.)

Using minitest (4.7.)

Using multi_json (1.8.)

Using atomic (1.1.)

Using thread_safe (0.1.)

Using tzinfo (0.3.)

Using activesupport (4.0.)

Using builder (3.1.)

Using erubis (2.7.)

Using rack (1.5.)

Using rack-test (0.6.)

Using actionpack (4.0.)

Using mime-types (1.25.)

Using polyglot (0.3.)

Using treetop (1.4.)

Using mail (2.5.)

Using actionmailer (4.0.)

Using activemodel (4.0.)

Using activerecord-deprecated_finders (1.0.)

Using arel (4.0.)

Using activerecord (4.0.)

Using bson (2.0.)

Using bson_ext (1.5.)

Using bundler (1.5.)

Using coffee-script-source (1.6.)

Using execjs (2.0.)

Using coffee-script (2.2.)

Using thor (0.18.)

Using railties (4.0.)

Using coffee-rails (4.0.)

Using connection_pool (1.2.)

Using hike (1.2.)

Using jbuilder (1.5.)

Using jquery-rails (3.0.)

Using json (1.8.)

Using mongo (1.3.)

Using optionable (0.2.)

Using moped (2.0..beta4)

Using origin (2.0.)

Using mongoid (4.0..alpha1) from git://github.com/mongoid/mongoid.git (at master)

Using tilt (1.4.)

Using sprockets (2.10.)

Using sprockets-rails (2.0.)

Using rails (4.0.)

Using rdoc (3.12.)

Using sass (3.2.)

Using sass-rails (4.0.)

Using sdoc (0.3.)

Using turbolinks (2.1.)

Using uglifier (2.4.)

Your bundle is complete!

Use `bundle show [gemname]` to see where a bundled gem is installed.

生成mongoid数据库配置文件

rails generate mongoid:config

      create  config/mongoid.yml

在这里不对mongoid.yml进行任何更改（假设已安装MongoDB并以默认设置启动），顺便贴一下生成的mongoid.yml 的文件内容

 development:

   # Configure available database sessions. (required)

   sessions:

     # Defines the default session. (required)

     default:

       # Defines the name of the default database that Mongoid can connect to.

       # (required).

       database: mongoid_app_development

       # Provides the hosts the default session can connect to. Must be an array

       # of host:port pairs. (required)

       hosts:

         - localhost:

       options:

         # Change the default write concern. (default = { w:  })

         # write:

         # w: 

         # Change the default consistency model to primary, secondary.

         # 'secondary' will send reads to secondaries, 'primary' sends everything

         # to master. (default: primary)

         # read: secondary_preferred

         # How many times Moped should attempt to retry an operation after

         # failure. (default: )

         # max_retries: 

         # The time in seconds that Moped should wait before retrying an

         # operation on failure. (default: )

         # retry_interval:

   # Configure Mongoid specific options. (optional)

   options:

     # Enable the identity map, needed for eager loading. (default: false)

     # identity_map_enabled: false

     # Includes the root model name in json serialization. (default: false)

     # include_root_in_json: false

     # Include the _type field in serializaion. (default: false)

     # include_type_for_serialization: false

     # Preload all models in development, needed when models use

     # inheritance. (default: false)

     # preload_models: false

     # Protect id and type from mass assignment. (default: true)

     # protect_sensitive_fields: true

     # Raise an error when performing a #find and the document is not found.

     # (default: true)

     # raise_not_found_error: true

     # Raise an error when defining a scope with the same name as an

     # existing method. (default: false)

     # scope_overwrite_exception: false

     # Use Active Support's time zone in conversions. (default: true)

     # use_activesupport_time_zone: true

     # Ensure all times are UTC in the app side. (default: false)

     # use_utc: false

 test:

   sessions:

     default:

       database: mongoid_app_test

       hosts:

         - localhost:

       options:

         read: primary

         # In the test environment we lower the retries and retry interval to

         # low amounts for fast failures.

         max_retries:

         retry_interval:

使用scaffold脚手架生成测试程序

rails generate scaffold User name:string email:string

      invoke  mongoid

      create    app/models/user.rb

      invoke  resource_route

       route    resources :users

      invoke  scaffold_controller

      create    app/controllers/users_controller.rb

      invoke    erb

      create      app/views/users

      create      app/views/users/index.html.erb

      create      app/views/users/edit.html.erb

      create      app/views/users/show.html.erb

      create      app/views/users/new.html.erb

      create      app/views/users/_form.html.erb

      invoke    helper

      create      app/helpers/users_helper.rb

      invoke    jbuilder

      create      app/views/users/index.json.jbuilder

      create      app/views/users/show.json.jbuilder

      invoke  assets

      invoke    coffee

      create      app/assets/javascripts/users.js.coffee

      invoke    scss

      create      app/assets/stylesheets/users.css.scss

      invoke  scss

      create    app/assets/stylesheets/scaffolds.css.scss

顺便也贴一下生成的model文件 user.rb

 class User

   include Mongoid::Document

   field :name, type: String

   field :email, type: String

 end
运行测试服务器
rails server

=> Booting WEBrick

=> Rails 4.0. application starting in development on http://0.0.0.0:3000

=> Run `rails server -h` for more startup options

=> Ctrl-C to shutdown server

[-- ::] INFO  WEBrick 1.3.

[-- ::] INFO  ruby 2.0. (--) [x86_64-linux]

[-- ::] INFO  WEBrick::HTTPServer#start: pid= port=

访问地址http://localhost:3000/users 并添加一条数据

运行mongo查看数据是否添加成功

mongo

MongoDB shell version: 2.4.

connecting to: test

> show dbs

mongoid_app_development    .203125GB

test    (empty)

> use mongoid_app_development

switched to db mongoid_app_development

> show collections

system.indexes

users

> db.users.find()

{ "_id" : ObjectId("52c1330a75627524e2000000"), "name" : "grj", "email" : "grj@example.com" }

> exit

bye

下载： mongoid_app.rar

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