ruby-on-rails - Ruby on the rails 关系

Question

我有用户和项目。用户可以有很多项目，项目可以有很多用户。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。我如何在 rails 中映射这种关系！！！

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"

您需要添加author_id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