fix generator for swagger_model when no property required

lib/swagger/docs/generator.rb

@@ -209,9 +209,9 @@ def get_klass_models(klass)
           klass.swagger_models.each do |model_name, model|
             formatted_model = {
               id: model[:id],
-              required: model[:required],
               properties: model[:properties],
             }
+            formatted_model[:required] = model[:required] if model[:required]
             formatted_model[:description] = model[:description] if model[:description]
             models[model[:id]] = formatted_model
           end

spec/fixtures/controllers/sample_controller.rb

@@ -76,6 +76,11 @@ class SampleController < SuperclassController
         property :name, :string, :optional, "Name", foo: "test"
         property_list :type, :string, :optional, "Type", ["info", "warning", "error"]
       end
+
+      swagger_model :OptionalTag do
+        description "A Tag object with no required property."
+        property :name, :string, :optional, "Name", foo: "test"
+      end
     end
   end
 end

spec/lib/swagger/docs/generator_spec.rb

@@ -435,7 +435,12 @@
             }
             expect(models['Tag']).to eq expected_model
           end
+
+          it "should not have required field when no property is required" do
+            expect(models['OptionalTag'].has_key?('required')).to eq false
+          end
         end
+
         context "custom resource_path resource file" do
           let(:resource) { file_resource_custom_resource_path.read }
           let(:response) { JSON.parse(resource) }