【1】新建一个Rails项目，这个就不多说了，我们把这个项目取名为ScaffoldTest
【2】配置好config/database.yml文件，也就是配置好数据库，当然之前要先建好相应的数据库
【3】新建好后，用generate工具，或在命令行敲下面的代码：
$ script/generate scaffold Contact name:string email:string
这是核心命令，意思创建一个模型层对象Contact，有两个字段，一个为name（数据类型为string），另一个为email（数据类型为string）
【3】如果不出意外的话，那就应该成功了，到app文件夹下的Controller、Model、View三个文件夹看看吧，CRUD已经有了，而且出现了四个模板视图：edit.html.erb、index.html.erb、new.html.erb、show.html.erb
【4】运行命令 $rake db:migrate，将db文件夹下生成的代码运行一遍，将该表及其字段相应的在数据库中创建
【5】重启服务器，在浏览器看看吧！
生成的 contacts_controller.rb如下：
class ContactsController < ApplicationController # GET /contacts # GET /contacts.xml def index @contacts = Contact.all respond_to do |format| format.html # index.html.erb format.xml { render :xml => @contacts } end end # GET /contacts/1 # GET /contacts/1.xml def show @contact = Contact.find(params[:id]) respond_to do |format| format.html # show.html.erb format.xml { render :xml => @contact } end end # GET /contacts/new # GET /contacts/new.xml def new @contact = Contact.new respond_to do |format| format.html # new.html.erb format.xml { render :xml => @contact } end end # GET /contacts/1/edit def edit @contact = Contact.find(params[:id]) end # POST /contacts # POST /contacts.xml def create @contact = Contact.new(params[:contact]) respond_to do |format| if @contact.save flash[:notice] = 'Contact was successfully created.' format.html { redirect_to(@contact) } format.xml { render :xml => @contact, :status => :created, :location => @contact } else format.html { render :action => "new" } format.xml { render :xml => @contact.errors, :status => :unprocessable_entity } end end end # PUT /contacts/1 # PUT /contacts/1.xml def update @contact = Contact.find(params[:id]) respond_to do |format| if @contact.update_attributes(params[:contact]) flash[:notice] = 'Contact was successfully updated.' format.html { redirect_to(@contact) } format.xml { head :ok } else format.html { render :action => "edit" } format.xml { render :xml => @contact.errors, :status => :unprocessable_entity } end end end # DELETE /contacts/1 # DELETE /contacts/1.xml def destroy @contact = Contact.find(params[:id]) @contact.destroy respond_to do |format| format.html { redirect_to(contacts_url) } format.xml { head :ok } end end end
【PS】如果此命令出错的话，可能是因为Rails的版本问题，可以参考这里：
http://topic.csdn.net/u/20070513/22/5931d7c7-7451-4cc3-9dc5-ca3afbb0cae8.html?241961724
