lib/active_model/serializers/json.rb in activemodel-5.1.7 vs lib/active_model/serializers/json.rb in activemodel-5.2.0.beta1

@@ -1,5 +1,7 @@
+# frozen_string_literal: true
+
 require "active_support/json"
 
 module ActiveModel
   module Serializers
     # == Active \Model \JSON \Serializer
@@ -8,11 +10,10 @@
       include ActiveModel::Serialization
 
       included do
         extend ActiveModel::Naming
 
-        class_attribute :include_root_in_json, instance_writer: false
-        self.include_root_in_json = false
+        class_attribute :include_root_in_json, instance_writer: false, default: false
       end
 
       # Returns a hash representing the model. Some configuration can be
       # passed through +options+.
       #