Fix error on defining anonymous serializer class, fixes Netflix#353

Author: daniel-illi

lib/fast_jsonapi/object_serializer.rb

@@ -130,7 +130,7 @@ def reflected_record_type
         return @reflected_record_type if defined?(@reflected_record_type)
 
         @reflected_record_type ||= begin
-          if self.name.end_with?('Serializer')
+          if self.name && self.name.end_with?('Serializer')
             self.name.split('::').last.chomp('Serializer').underscore.to_sym
           end
         end

spec/lib/object_serializer_spec.rb

@@ -314,20 +314,27 @@ class BlahBlahSerializer
       expect(BlahBlahSerializer.record_type).to be :blah_blah
     end
 
+    it 'should set default_type for a namespaced serializer' do
+      module V1
+        class BlahSerializer
+          include FastJsonapi::ObjectSerializer
+        end
+      end
+      expect(V1::BlahSerializer.record_type).to be :blah
+    end
+
     it 'shouldnt set default_type for a serializer that doesnt follow convention' do
       class BlahBlahSerializerBuilder
         include FastJsonapi::ObjectSerializer
       end
       expect(BlahBlahSerializerBuilder.record_type).to be_nil
     end
 
-    it 'should set default_type for a namespaced serializer' do
-      module V1
-        class BlahSerializer
-          include FastJsonapi::ObjectSerializer
-        end
+    it 'shouldnt set default_type for an anonymous serializer' do
+      serializer_class = Class.new do
+        include FastJsonapi::ObjectSerializer
       end
-      expect(V1::BlahSerializer.record_type).to be :blah
+      expect(serializer_class.record_type).to be_nil
     end
   end