role.rb in dynamic-fields-for-1.2.1

- old
+ new

@@ -1,5 +1,9 @@
 class Role < ActiveRecord::Base
   belongs_to :user
 
+  has_many :permissions, inverse_of: :role
+
+  accepts_nested_attributes_for :permissions, allow_destroy: true
+
   validates :user, :role_name, presence: true
 end