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The Kai Way

[译文] New Feature on Rails 2.1: change_table

原文:http://blog.codefront.net/2008/05/04/living-on-the-edge-of-rails-19-change_table-for-migrations-and-more/

现在可以通过 change_table 代码块来完成对数据库表的修改。

change_table :videos do |t|
  t.add_timestamps
  t.add_belongs_to :goat
  t.add_string :name, :email, :limit => 20
  t.remove_column :name, :email # takes multiple arguments
  t.rename :new_name
  t.string :new_string_column # executes against the renamed table name
end

补充些要注意的事情: