consumes support for PATCH (#654)

Author: anakinj

CHANGELOG.md

@@ -13,6 +13,7 @@
 * [#642](https://github.com/ruby-grape/grape-swagger/pull/642): Fix examples link in readme - [@iBublik](https://github.com/iBublik).
 * [#641](https://github.com/ruby-grape/grape-swagger/pull/641): Exclude default success code if http_codes define one already - [@anakinj](https://github.com/anakinj).
 * [#651](https://github.com/ruby-grape/grape-swagger/pull/651): Apply `values` and `default` of array params to its items - [@yewton](https://github.com/yewton).
+* [#654](https://github.com/ruby-grape/grape-swagger/pull/654): Allow setting the consumes for PATCH methods - [@anakinj](https://github.com/anakinj).
 
 * Your contribution here.
 

lib/grape-swagger/endpoint.rb

@@ -161,14 +161,11 @@ def produces_object(route, format)
       route_mime_types.present? ? route_mime_types : mime_types
     end
 
-    def consumes_object(route, format)
-      method = route.request_method.downcase.to_sym
-      if route.settings.dig(:description, :consumes)
-        format = route.settings[:description][:consumes]
-      end
-      mime_types = GrapeSwagger::DocMethods::ProducesConsumes.call(format) if %i[post put].include?(method)
+    SUPPORTS_CONSUMES = %i[post put patch].freeze
 
-      mime_types
+    def consumes_object(route, format)
+      return unless SUPPORTS_CONSUMES.include?(route.request_method.downcase.to_sym)
+      GrapeSwagger::DocMethods::ProducesConsumes.call(route.settings.dig(:description, :consumes) || format)
     end
 
     def params_object(route, path)

spec/swagger_v2/api_swagger_v2_format-content_type_spec.rb

@@ -49,6 +49,14 @@ class ProducesApi < Grape::API
           { 'declared_params' => declared(params) }
         end
 
+        desc 'This uses consumes for consumes',
+             failure: [{ code: 400, model: Entities::ApiError }],
+             consumes: ['application/www_url_encoded'],
+             entity: Entities::UseResponse
+        patch '/use_consumes' do
+          { 'declared_params' => declared(params) }
+        end
+
         add_swagger_documentation
       end
     end
@@ -123,6 +131,7 @@ def app
     specify do
       expect(subject['paths']['/use_consumes']['post']).to include('consumes')
       expect(subject['paths']['/use_consumes']['post']['consumes']).to eql ['application/www_url_encoded']
+      expect(subject['paths']['/use_consumes']['patch']['consumes']).to eql ['application/www_url_encoded']
     end
   end
 end