我想自動爲CREATE_TABLE軌遞增ID列命令開始如何設置值初始AUTO_INCREMENT ID在SQL在500如何在create_table上設置初始ID值?
我發現的例子:
CREATE TABLE student (id int(2) NOT NULL auto_increment, name varchar(50) NOT NULL default '', class varchar(10) NOT NULL default '', mark int(3) NOT NULL default '0', sex varchar(6) NOT NULL default 'male', UNIQUE KEY id (id)) auto_increment=100000 TYPE=MyISAM;
所以我看了看Rails的API,並看到了CREATE_TABLE方法這些選項:
The options hash can include the following keys:
:id
Whether to automatically add a primary key column. Defaults to true. Join tables for has_and_belongs_to_many should set :id => false.
:primary_key
The name of the primary key, if one is to be added automatically. Defaults to id.
:options
Any extra options you want appended to the table definition.
:temporary
Make a temporary table.
:force
Set to true to drop the table before creating it. Defaults to false.
不是我所需要......我想這沒有成功:
:options => {:auto_increment => 500}
任何人都知道如何獲得自增長ID列對於這一說法在500開始:
create_table :contents do |t|
t.string :type, :null => false
t.string :name, :null => false
end
這做到了!謝謝! – Matthew 2009-04-24 17:26:46