changed represent to check for objects that respond to to_ary instead of checking to see if its an array. updated spec

Author: Simeon Bateman

lib/grape/entity.rb

@@ -143,16 +143,16 @@ def self.root(plural, singular=nil)
     #   entity. Pass nil or false to represent the object or objects with no
     #   root name even if one is defined for the entity.
     def self.represent(objects, options = {})
-      inner = if objects.is_a?(Array)
-        objects.map{|o| self.new(o, {:collection => true}.merge(options))}
+      inner = if objects.respond_to?(:to_ary)
+        objects.to_ary().map{|o| self.new(o, {:collection => true}.merge(options))}
       else
         self.new(objects, options)
       end
 
       root_element = if options.has_key?(:root)
         options[:root]
       else
-        objects.is_a?(Array) ? @collection_root : @root
+        objects.respond_to?(:to_ary) ? @collection_root : @root
       end
       root_element ? { root_element => inner } : inner
     end

spec/grape/entity_spec.rb

@@ -46,6 +46,10 @@
         subject.represent(Object.new).should be_kind_of(subject)
       end
 
+      it 'should return a single entity if called with a hash' do
+        subject.represent(Hash.new).should be_kind_of(subject)
+      end
+
       it 'should return multiple entities if called with a collection' do
         representation = subject.represent(4.times.map{Object.new})
         representation.should be_kind_of(Array)