Question

I have two models:

User (id)
Authentication (id, provider,..)

How can I get all users that Do not have a authentication.provider eq to “facebook”?

Thanks

class Authentication < ActiveRecord::Base
  belongs_to :user    
end

class User < ActiveRecord::Base
    has_many :authentications

Answer 1

UPD. Please, refer to Octopus-Paul’s answer for a better solution.

I guess, it would look something like this:

User.joins(:authentications).where("authentications.provider != 'facebook'")