gem devise配置

Step1: Gemfile中加入gem 'devise'

 

Step3: rails g devise:install

           這一步執行完後命令行會提醒要手動進行以下動做：

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

1. Ensure you have defined default url options in your environments files. Here
is an example of default_url_options appropriate for a development environment
in config/environments/development.rb:

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

In production, :host should be set to 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. You can copy Devise views (for customization) to your app by running:

rails g devise:views

 

Step4:  rails g devise User

Step6: rake db:migrate

最後，咱們能夠看看generator在router.rb文件中的devise_for都產生了什麼路由.咱們能夠經過rake routes，結果以下:

能夠把devise的登陸頁面做爲系統首頁，設置方式爲在routes.rb文件中設置以下信息：

 devise_scope :user do
    root to: "devise/sessions#new"
  end

或者

devise_scope :user do

    unauthenticated :user do
        root to: "devise/sessions#new",as: :unauthenticated_root #設定登陸頁爲系統默認首頁
    end
    authenticated :user do
        root to: "homes#index",as: :authenticated_root #設定系統登陸後首頁
    end

end

 

 

application_controlller中加入如下代碼

before_action :authenticate_user!     #權限控制,管控僅登陸用戶方可訪問login頁面之外內容