三、rails模型-控制器-视图

Step 0. git分支

$ git checkout -b ch02

Step 1. 设计Group的model结构

字段	类型	描述
title	string	标题
description	text	详情

$ rails g model group title:string description:text
$ rake db:migrate

Step 2. 产生groups的controller

$ rails g controller groups

app/controllers/groups_controller.rb

class GroupsController < ApplicationController
  def index
    @groups = Group.all
  end
end

Step 3. groups的controller内函数对应的视图

app/views/groups/index.html.erb

  

    <%= link_to("New group", new_group_path, class: "btn btn-primary pull-right") %>
  
  
      <% @groups.each do |group| %>
        
      <% end %>
    

    

      

        
#
        
Title
        
Description
      
    
    

      

          
#
          
<%= link_to(group.title, group_path(group)) %>
          
<%= group.description %>
          

              <%= link_to("Edit", edit_group_path(group), class: "btn btn-sm btn-default")%>
              <%= link_to("Delete", group_path(group),    class: "btn btn-sm btn-default", 
                          method: :delete, data: { confirm: "Are you sure?" } )%>
          
        
  

Step 4. 资源路由

config/routes.rb

Rails.application.routes.draw do
   resources :groups
   root 'welcome#index'
end

Step 5. 模拟数据

（可选操作）pry-rails

$ rails c

> Group.create(title: "Board 1", description: "Board 1 body")
> Group.create(title: "Board 2", description: "Board 2 body")

Step 6. git存档

$ git add .
$ git commit -m "create groups index"