[英]Rails Routes.rb
如果routes.rb
文件仅指定以下内容,rails如何知道如何映射到控制器中的每个功能:
resources :users
但是在UsersController
内部
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
rails如何确定例如index function maps
到GET/users
而create function
映射到POST/users
?
resources :users
甚至如何知道如何映射到UsersController
?
Rails基于“约定之上的配置”范式。
这样,“ resources:users”行表示相应的UsersController支持所有标准CRUD方法。<-'Users'前缀与Controller,Model等匹配。
请查看Rails路线指南: http : //guides.rubyonrails.org/routing.html
并在实践中看到路由声明在您的项目目录中发出了以下命令:
耙路
同样如前所述,请遵守约定并记住Rails是一个非常自以为是的软件。
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