[英]Model association that spans across parent app and engine
I'm making a Rails engine that makes reference to the current_user
in a controller like so: 我正在制作一个在控制器中引用current_user
的Rails引擎,如下所示:
require_dependency "lesson_notes/application_controller"
module LessonNotes
class NotesController < ApplicationController
def index
if current_user
@notes = Note.where(student: current_user) if current_user.user_type.name == "student"
@notes = Note.where(teacher: current_user) if current_user.user_type.name == "teacher"
end
end
end
end
This is quite verbose and it would seem I could do something like this instead: 这是非常冗长的,似乎我可以做这样的事情:
require_dependency "lesson_notes/application_controller"
module LessonNotes
class NotesController < ApplicationController
def index
@notes = current_user.notes if current_user
end
end
end
However, the user model exists in the parent app, not the engine . 但是, 用户模型存在于父应用程序中,而不存在于engine中 。
In the Note
model I have this to define the belongs_to
association: 在Note
模型中,我可以用它来定义belongs_to
关联:
module LessonNotes
class Note < ActiveRecord::Base
belongs_to :student, class_name: "::User"
belongs_to :teacher, class_name: "::User"
end
end
How would I define the other side of the association - the has_many
- in the User
model? 如何在User
模型中定义关联的另一端has_many
?
This is how I ended up doing it... 这就是我最终这样做的方式...
In the parent app: 在父应用中:
class User < ActiveRecord::Base
has_many :notes, class_name: LessonNotes::Engine::Note, foreign_key: "teacher_id"
end
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.