Rails Routes.rb

Question

如果routes.rb文件只指定了以下内容，rails如何知道如何映射到控制器中的每个函数：

resources :users

但在UsersController内有

class UsersController < ApplicationController
  # GET /users
  # GET /users.json
  def index
    @users = User.all

    respond_to do |format|
      format.html # index.html.erb
      format.json { render :json => @users }
    end
  end

  # GET /users/1
  # GET /users/1.json
  def show
    @user = User.find(params[:id])

    respond_to do |format|
      format.html # show.html.erb
      format.json { render :json => @user }
    end
  end

  # GET /users/new
  # GET /users/new.json
  def new
    @user = User.new

    respond_to do |format|
      format.html # new.html.erb
      format.json { render :json => @user }
    end
  end

  # GET /users/1/edit
  def edit
    @user = User.find(params[:id])
  end

  # POST /users
  # POST /users.json
  def create
    @user = User.new(params[:user])

    respond_to do |format|
      if @user.save
        format.html { redirect_to @user, :notice => 'User was successfully created.' }
        format.json { render :json => @user, :status => :created, :location => @user }
      else
        format.html { render :action => "new" }
        format.json { render :json => @user.errors, :status => :unprocessable_entity }
      end
    end
  end

  # PUT /users/1
  # PUT /users/1.json
  def update
    @user = User.find(params[:id])

    respond_to do |format|
      if @user.update_attributes(params[:user])
        format.html { redirect_to @user, :notice => 'User was successfully updated.' }
        format.json { head :no_content }
      else
        format.html { render :action => "edit" }
        format.json { render :json => @user.errors, :status => :unprocessable_entity }
      end
    end
  end

  # DELETE /users/1
  # DELETE /users/1.json
  def destroy
    @user = User.find(params[:id])
    @user.destroy

    respond_to do |format|
      format.html { redirect_to users_url }
      format.json { head :no_content }
    end
  end
end

当index function maps映射到GET/users时，rails如何确定create function到POST/users？

resources :users如何知道如何映射到UsersController？

Answer 1

Rails基于'约定优于配置'范例。

因此，“resources：users”行表示相应的UsersController支持所有标准CRUD方法＆lt; - 'Users'前缀与Controller，Model等匹配。

Answer 2

请查看导轨路线指南：http://guides.rubyonrails.org/routing.html

并且在实践中看到路径声明在项目目录中发出此命令的内容：

  

rake routes

同样如前所述，坚持使用惯例并记住rails是一个非常固定的软件。