Implement ArraySerializer

lib/active_model/array_serializer.rb

@@ -0,0 +1,19 @@
+module ActiveModel
+  class ArraySerializer
+    def initialize(object, options={})
+      @object  = object
+      @options = options
+    end
+
+    def serializable_array
+      @object.map do |item|
+        if serializer = Serializer.serializer_for(item)
+          serializer.new(item).serializable_object(@options.merge(root: nil))
+        else
+          item.as_json
+        end
+      end
+    end
+    alias serializable_object serializable_array
+  end
+end

lib/active_model/serializer.rb

@@ -9,7 +9,11 @@ module ActiveModel
       end
 
       def serializer_for(resource)
-        "#{resource.class.name}Serializer".safe_constantize
+        if resource.respond_to?(:to_ary)
+          ArraySerializer
+        else
+          "#{resource.class.name}Serializer".safe_constantize
+        end
       end
 
       attr_accessor :_root, :_attributes, :_associations
@@ -114,6 +118,7 @@ module ActiveModel
       hash = attributes
       hash.merge! associations
     end
+    alias serializable_object serializable_hash
 
     def as_json(options={})
       if root = options[:root] || self.root

lib/active_model_serializers.rb

@@ -1,5 +1,6 @@
 require 'active_model'
 require 'active_model/serializer'
+require 'active_model/array_serializer'
 
 begin
   require 'action_controller'