Query serializer no longer sends nil as empty value.

Fixes #133

CHANGELOG.md

@@ -27,6 +27,9 @@ Next Release (TBD)
 
 * Feature - Waiters - Added waiters for Amazon EC2 image availability.
 
+* Issue - Resolved an issue with the query serializer sending `nil`
+  values. See #133.
+
 2.0.2 (2014-10-08)
 ------------------
 

aws-sdk-core/lib/aws-sdk-core/query/ec2_param_builder.rb

@@ -29,8 +29,10 @@ def apply(shape, params)
       # @param [String, nil] prefix
       def structure(structure, values, prefix)
         values.each do |name, value|
-          member_shape = structure.member(name)
-          format(member_shape, value, prefix + query_name(member_shape))
+          unless value.nil?
+            member_shape = structure.member(name)
+            format(member_shape, value, prefix + query_name(member_shape))
+          end
         end
       end
 

aws-sdk-core/lib/aws-sdk-core/query/param_builder.rb

@@ -29,8 +29,10 @@ def apply(shape, params)
       # @param [String, nil] prefix
       def structure(structure, values, prefix)
         values.each do |name, value|
-          member_shape = structure.member(name)
-          format(member_shape, value, prefix + query_name(member_shape))
+          unless value.nil?
+            member_shape = structure.member(name)
+            format(member_shape, value, prefix + query_name(member_shape))
+          end
         end
       end
 

aws-sdk-core/spec/aws/query/param_builder_spec.rb

@@ -58,6 +58,15 @@ def query_params(params = {})
             ])
           end
 
+          it 'does not serialize nil values' do
+            members['Name'] = { 'type' => 'string' }
+            members['Nickname'] = { 'type' => 'string' }
+            params = { name: 'John', nickname: nil }
+            expect(query_params(params)).to eq([
+              ['Name', 'John'],
+            ])
+          end
+
         end
 
         describe 'flattened lists' do