2.rails笔记

6.can'find generatescript/xxx has only one file:rails.oh,this is the diffrence between rail3 and rail2.see diffrences here:http://www.cnblogs.com/lexus/archive/2010/11/11/1875134.htmlthis book is old.so i read csdn blog first.http://blog.csdn.net/abbuggy/article/details/74049757.rails g --helpshow rails generate help8.creat a new controlleradministrator@ubuntu:~/www/depot$ rails g controller hello hello      create  app/controllers/hello_controller.rb       route  get "hello/hello"      invoke  erb      create    app/views/hello      create    app/views/hello/hello.html.erb      invoke  test_unit      create    test/functional/hello_controller_test.rb      invoke  helper      create    app/helpers/hello_helper.rb      invoke    test_unit      create      test/unit/helpers/hello_helper_test.rb      invoke  assets      invoke    coffee      create      app/assets/javascripts/hello.js.coffee      invoke    scss      create      app/assets/stylesheets/hello.css.scssfrom see this file in app dictory.The dictory tree is very clear to coder.After created,u can visited the web from:http://localhost:3000/hello/helloAnd u could see:Hello#helloFind me in app/views/hello/hello.html.erb in the website.9.$rails g scaffold product title:string description:text image_url:string$rake db:migrate$rails g migration add_price_to_product price:decimal      invoke  active_record      create    db/migrate/20120726135706_add_price_to_product.rbmysql> select * from schema_migrations;+----------------+| version        |+----------------+| 20120726125236 || 20120726135706 |+----------------+10.Can't mass-assign protected attributes: priceapp/models/product.rbattr_accessible :description, :image_url, :title, :price