Rails has_one and has_many association on the same model

Question

I have a users model and a groups model.

A user has_and_belongs_to_many :groups and a group has_and_belongs_to_many :users. The associations and join tables work correctly.

A group can only have one user who owns the group, I want to name be able to call @group.owner to return the user that owns the group but am unsure of how to do it, I've created a user references column on the Group table rails g migration add_user_to_groups user:references but I don't know what to put in the Group model, something like has_one :user, as: :owner

Is this the correct way to do it?

score 2 · Answer 1 · edited Jun 18 '14 at 12:47

2

has_one :owner, class_name: "User", foreign_key: 'user_id'

edited Jun 18 '14 at 12:47

Sully

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answered Jun 18 '14 at 12:39

manu29.d

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What you mean to say is, `has_one` throws error for you ? – manu29.d Jun 19 '14 at 03:24

Rails has_one and has_many association on the same model

1 Answers1