これが機能しない理由がわかりません
class User
include Mongoid::Document
class Student < User
include Mongoid::Document
....
has_one :parent , class_name: "Parent", inverse_of: :children
class Parent < User
include Mongoid::Document
....
has_many :children, class_name: "Student", inverse_of: :parent
親子関係を設定しようとすると
jane = Student.create!(name: "Jane")
janesParent = Parent.new(name: "Jenny")
janesParent.children.push(jane)
janesParent.save!
このエラーが発生します
When adding a(n) Student to Parent#children, Mongoid could not determine the
inverse foreign key to set. The attempted key was 'parent_id'.
私は何を間違えましたか？
PSこれらを埋め込みたくない場合は、該当するタイプのIDを保存したい。