Add owner association to charge, subscription, and payment method models (#1186)

Author: excid3

app/models/pay/charge.rb

@@ -3,6 +3,7 @@ class Charge < Pay::ApplicationRecord
     # Associations
     belongs_to :customer
     belongs_to :subscription, optional: true
+    has_one :owner, through: :customer
 
     # Scopes
     scope :sorted, -> { order(created_at: :desc) }

app/models/pay/payment_method.rb

@@ -1,6 +1,7 @@
 module Pay
   class PaymentMethod < Pay::ApplicationRecord
     belongs_to :customer
+    has_one :owner, through: :customer
 
     store_accessor :data, :brand # Visa, Mastercard, Discover, PayPal
     store_accessor :data, :last4

app/models/pay/subscription.rb

@@ -6,6 +6,7 @@ class Subscription < Pay::ApplicationRecord
     belongs_to :customer
     belongs_to :payment_method, optional: true, primary_key: :processor_id
     has_many :charges
+    has_one :owner, through: :customer
 
     # Scopes
     scope :for_name, ->(name) { where(name: name) }