红宝石在轨道上的关系

Question

我有用户和项目。用户可以有许多项目，项目可以有许多用户。现在项目有一个特定的用户作为作者或创建者，即。项目有一个创建者，该创建者也是用户。如何在轨道中映射此关系!!

Answer 1

#Project
has_and_belongs_to_many :users
belongs_to :author, :class_name => "User"
#User
has_and_belongs_to_many :projects
has_many :authored_projects, :class_name => "Project", :foreign_key => "author_id"

您需要将author_id添加到项目表中。

所以你可以使用：project.author、user.authored_projects等

Answer 2

试试这个

class User < ActiveRecord::Base
 has_and_belongs_to_many :projects
 has_many :created_projects, :class_name => "Project", :foreign_key => "creator_id"    
end

class Project< ActiveRecord::Base
 has_and_belongs_to_many :users  
 belongs_to :creator, :class_name => "User"
end