Rails Active Record: find in conjunction with :order and :group

Question

I have a structure something like this:

class User
  has_many :dongles
  has_many :licences, :through => :dongles
end

class Dongle
  has_many :licences
          


        

Answer 1

Have you tried with a default scope? First, you can try to add the order in the has_many as I've shown in the User.

class User
  has_many :dongles
  has_many :licences, :through => :dongles, :order => 'created_at DESC'
end

However, I am not sure if that actually works with a has-many-through association, maybe, if that doesn't work you can try to add it to the association in Dongle instead.

class Dongle
  has_many :licences, :order => 'created_at DESC'
  belongs_to :user
end

The second option would be to try with a default scope as I've shown in the License.

class Licence
  default_scope :order => 'created_at DESC'
  belongs_to :dongle
end

after that it should be enough to just get it with user.licenses.find(:first)