Question

I have the following models:

class Label < ActiveRecord::Base
  has_many :releases
end

class Release < ActiveRecord::Base
  belongs_to :label
  has_many :products
  has_and_belongs_to_many :tracks

  def self.releases_count
   self.count(:all)
  end
end

class Product < ActiveRecord::Base
  belongs_to :release

  has_many :releases_tracks, :through => :release, :source => :tracks      
  has_and_belongs_to_many :tracks

  def self.products_count
   self.count(:all)
  end
 end

On my label/index view i’m able to display a count of the Releases absolutely fine using:

 <%= label.releases.releases_count %>

I’m trying to do the same for Products using:

 <%= label.releases.products.products_count %>

But get a NoMethodError:

 undefined method `products' for #<Label:0x10ff59690>

Any ideas?

I have lots of other aggregations I want to perform (Track Counts etc) so some guidance on where I’m going wrong would be really appreciated.

Answer 1

You need define your production/Label association

class Label < ActiveRecord::Base
  has_many :releases
  has_many :products, :through => :releases
end