educoder/app/models/member_role.rb

class MemberRole < ApplicationRecord
  belongs_to :role
  belongs_to :member

  validates :member_id, :role_id, presence: true
end
first commit 6 years ago			`class MemberRole < ApplicationRecord`
apply join project api 6 years ago			`belongs_to :role`
first commit 6 years ago			`belongs_to :member`
ADD project's members api 5 years ago
			`validates :member_id, :role_id, presence: true`
first commit 6 years ago			`end`