Simply delegate as_json to records

activerecord/lib/active_record/relation.rb

@@ -261,10 +261,6 @@ module ActiveRecord
       coder.represent_seq(nil, records)
     end
 
-    def as_json(options = nil) #:nodoc:
-      records.as_json(options)
-    end
-
     # Returns size of the records.
     def size
       loaded? ? @records.length : count(:all)

activerecord/lib/active_record/relation/delegation.rb

@@ -38,7 +38,7 @@ module ActiveRecord
 
     delegate :to_xml, :encode_with, :length, :collect, :map, :each, :all?, :include?, :to_ary, :join,
              :[], :&, :|, :+, :-, :sample, :reverse, :compact, :in_groups, :in_groups_of,
-             :to_sentence, :to_formatted_s,
+             :to_sentence, :to_formatted_s, :as_json,
              :shuffle, :split, :index, to: :records
 
     delegate :table_name, :quoted_table_name, :primary_key, :quoted_primary_key,

activerecord/test/cases/relation/delegation_test.rb

@@ -33,7 +33,7 @@ module ActiveRecord
       :map, :none?, :one?, :partition, :reject, :reverse,
       :sample, :second, :sort, :sort_by, :third,
       :to_ary, :to_set, :to_xml, :to_yaml, :join,
-      :in_groups, :in_groups_of, :to_sentence, :to_formatted_s
+      :in_groups, :in_groups_of, :to_sentence, :to_formatted_s, :as_json
     ]
 
     ARRAY_DELEGATES.each do |method|