ruby-on-rails - 在表之间创建复杂关系的步骤

Question

在这里（http://allaboutruby.wordpress.com/2009/08/08/5-minute-project-in-rails/）我们可以看到如何在表之间创建 1-m 关系，但是我应该执行哪些步骤来创建例如下一种表之间的关系：

http://docs.oracle.com/cd/E14373_01/appdev.32/e13363/issue_track_obj.htm

为了简化，只是如何创建关系user can have several created by him bugs and can be assigned to the several bugs created by other users.

谢谢。

Answer 1

首先，您需要 bugs 表上的两列，creator_id 和 assignee_id。然后，您只需创建以下关系：

class User < ActiveRecord::Base
  has_many :created_bugs, :class_name => 'Bug', :foreign_key => :creator_id
  has_many :assigned_bugs, :class_name => 'Bug', :foreign_key => :assignee_id
end

class Bug < ActiveRecord::Base
  belongs_to :creator, :class_name => 'User'
  belongs_to :assignee, :class_name => 'User'
end