I’ve got a Rails 3.1 app with a User model and a House model (this is like a group). I’ve set up a many-to-many relation with join model Membership between those two and there are methods to manages roles of a user in some house in the join model.
But my problem is that a User has only one house and not many. So I always have to do user.houses.first to get his house (I’ve set up a helper house which does that) but the design is not good so I’ve tried to put has_one :membership and has_one :house, :through => :membership instead of has_many :memberships and has_many :houses, :through => :memberships. But I got an error each time I try to access house from User.
How is it possible to set up this one-to-many relation with a join table like I was trying to do ?
Thank you in advance.
If you are going to use the one to many relation then association should be.
House
has_many :memberships
has_many :users, :through => :memberships
User
has_one :membership
has_one :house, :through => :membership