CODEWITHSUNDEEP
ruby-on-railsassociationsrelationship
mzdravkov
mzdravkov

Reputation: 145

Rails inverse_of confusion

I have these two models: Team and User.

Each user can have team and each team has many users. But I want to call team.users with team.members. I managed to do this with class_name, but I also need to have access to Team by User. In other words user.team should return me the team, in which the User is. Here is what I came up with...

My models are as follows:

class Team < ActiveRecord::Base
  has_many :members, foreign_key: 'id', class_name: 'User', :inverse_of => :team
end

class User < ActiveRecord::Base
  belongs_to :team, :inverse_of => :user
end

(I tried with :inverse_of => :members too, inside the User model.)

Upvotes: 1

Views: 1665

Answers (1)

Sven Koschnicke
Sven Koschnicke

Reputation: 6711

You got the :inverse_of right, at least when you use :inverse_of => :members. The problem here is the foreign key. foreign_key specifies the name of the key-column in the other table, so in your case in the user-table. If you specify just id, the id of the user would be used. Just leave it to the default by not specifying an foreign key, then its team_id.

class Team < ActiveRecord::Base
  has_many :members, :class_name => 'User', :inverse_of => :team
end

class User < ActiveRecord::Base
  belongs_to :team, :inverse_of => :members
end

And try to not mix hash-syntax from ruby 1.8 (:key => 'value') with the new syntax from ruby 1.9 (key: 'value').

Upvotes: 1

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