CODEWITHSUNDEEP
ruby-on-railsmongodbmongoid
dboyd68
dboyd68

Reputation: 1104

Mongoid self reference collection has_many not working

Can't work out why this is not working

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

When I try to setup the parent/child relationship via

jane = Student.create!(name: "Jane")
janesParent = Parent.new(name: "Jenny")
janesParent.children.push(jane)
janesParent.save!

I get this error

  When adding a(n) Student to Parent#children, Mongoid could not determine the    
  inverse foreign key to set. The attempted key was 'parent_id'.

What have I done wrong?

P.S I don't want to embed these want to store the id's if applicable types.

Upvotes: 1

Views: 989

Answers (2)

Santhosh
Santhosh

Reputation: 29094

If it is 1-N relation, change Student model relation to

belongs_to :parent, class_name: "Parent", inverse_of: :children

Upvotes: 3

Pierre-Louis Gottfrois
Pierre-Louis Gottfrois

Reputation: 17631

Have you tried and has_and_belongs_to_many relation ?

Upvotes: 2

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