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I’m trying to make a application where a user belongs to multiple courses and multiple assignments belong to a course. I’m using devise for the user model. I want to be able to find all the courses a user belongs to and all the assignments their courses have.
User model:
has_and_belongs_to_many :course
has_many :assignments, :through => :courses
Course model:
has_and_belongs_to :user
has_many :assignments
Assignment model:
belongs_to :course
this requires an intermediate table CoursesUsers with columns user_id and course_id
and column course_id in Assignment
with this give you can do things like
current_user.courses
current_user.assignments
some_course.assignments
some_course.users
(assuming there is a current_user or some_course)
Read about details here: Active Record Associations Especially how to setup the has_and_belongs_to_many association