factory_girl：通过关联有很多

Question

我在项目和用户之间有很多很多的关系。 我的项目模型有：

  has_many :project_members, dependent: :destroy, foreign_key: 'gallery_id'
  has_many :members, through: :project_members,
                     class_name: 'User',
                     foreign_key: 'member_id' 

用户模型：

  has_many :project_members, dependent: :destroy, foreign_key: 'member_id'
  has_many :member_projects, through: :project_members,
                             source: :member_project

和project_member模型：

  belongs_to :member_project, foreign_key: 'gallery_id', class_name: 'Project'
  belongs_to :member, foreign_key: 'member_id', class_name: 'User'

我写的项目工厂为：

FactoryGirl.define do
  factory :project_member do
    association :project
    association :user
    role 'owner'
  end
end

但是它给了我：

>  undefined method `project=' for #<ProjectMember:0x00000006f66048>

如果我写以下内容：

FactoryGirl.define do
  factory :project_member do
    association :member_project, foreign_key: 'gallery_id', class_name: 'Project'
    association :member, foreign_key: 'member_id', class_name: 'User'
    role 'owner'
  end
end

它说：

工厂未注册：member_project

我不确定如何通过工厂对象定义多对多。

Answer 1

假设您有用于项目和用户的工厂

factory :project_member do
    member_project FactoryGirl.build(:project)
    member FactoryGirl.build(:user)
    role 'owner'
end