常用操作

1.创建类 $ rails generate scaffold user name:text password:text

2.创建类，如果该类已经存在则进行修改

$ rails generate scaffold user name:text password:text --force

ruby的类型与数据库中属性的类型对应关系如下

Rails Migration Data Types – MySql – Postgresql – SQLite ------------------------------------------------------ Rails mysql postgresql sqlite :binary blob bytea blob :boolean tinyint(1) boolean boolean :date date date date :datetime datetime timestamp datetime :decimal decimal decimal decimal :float float float float :integer int(11) integer integer :string varchar(255) * varchar(255) :text text text text :time time time datetime :timestamp datetime timestamp datetime

3.删除类

$ rails destroy scaffold testUser

4.创建控制器

5.删除控制器

$ rails destroy controller home index

6.rake创建数据库

$ rake db:create

7.rake 删除数据库

$ rake db:drop:all

7.rake实现类与实体的映射

$ rake db:migrate