subscription

class Subscription < Base
    def self.find_by_customer_reference(reference)
      customer = Customer.find_by_reference(reference)
      find(:first, :params => {:customer_id => customer.id}) 
    end
    
    # Strip off nested attributes of associations before saving, or type-mismatch errors will occur
    def save
      self.attributes.delete('customer')
      self.attributes.delete('product')
      self.attributes.delete('credit_card')
      super
    end
    
    def cancel
      destroy
    end
    
    # Perform a one-time charge on an existing subscription.
    # For more information, please see the one-time charge API docs available 
    # at: http://support.chargify.com/faqs/api/api-charges
    def charge(attrs = {})
      post :charges, :charge => attrs
    end
  end