instance level class access was removed, ask class for name instead of i...

lib/protobuf/message.rb

@@ -65,7 +65,7 @@ def each_field_for_serialization
         value = @values[field.name]
 
         if value.nil?
-          raise ::Protobuf::SerializationError, "Required field #{self.name}##{field.name} does not have a value."
+          raise ::Protobuf::SerializationError, "Required field #{self.class.name}##{field.name} does not have a value."
         else
           yield(field, value)
         end

spec/lib/protobuf/message_spec.rb

@@ -128,7 +128,7 @@
     end
 
     context "when there's no value for a required field" do
-      let(:message) { ::Test::Resource.new }
+      let(:message) { ::Test::ResourceWithRequiredField.new }
 
       it "raises a 'message not initialized' error" do
         expect {

spec/support/test/resource.pb.rb

@@ -23,6 +23,7 @@ class StatusType < ::Protobuf::Enum
   class ResourceFindRequest < ::Protobuf::Message; end
   class ResourceSleepRequest < ::Protobuf::Message; end
   class Resource < ::Protobuf::Message; end
+  class ResourceWithRequiredField < ::Protobuf::Message; end
   class Searchable < ::Protobuf::Message
     class SearchType < ::Protobuf::Enum
       define :FLAT, 1
@@ -71,6 +72,10 @@ class Resource
     optional :bool, :ext_dup_field, 106, :extension => true
   end
 
+  class ResourceWithRequiredField
+    required :string, :foo_is_required, 1
+  end
+
   class MessageParent
     class MessageChild
       optional :string, :child1, 1

spec/support/test/resource.proto

@@ -27,6 +27,10 @@ message Resource {
   repeated StatusType repeated_enum = 4;
 }
 
+message ResourceWithRequiredField {
+  required string foo_is_required = 1;
+}
+
 message Searchable {
   enum SearchType {
     FLAT = 1;