[WIP] Force mounted endpoints to inherit params and validations from …

…the mounting API.

lib/grape/api.rb

@@ -90,6 +90,10 @@ def inherited(subclass)
 
       def inherit_settings(other_settings)
         top_level_setting.inherit_from other_settings.point_in_time_copy
+        endpoints.each { |e|
+          e.inheritable_setting.route[:saved_declared_params] << top_level_setting.route[:declared_params]
+          e.inheritable_setting.route[:saved_validations] += top_level_setting.namespace_stackable[:validations]
+        }
 
         endpoints.each(&:reset_routes!)
 

spec/grape/endpoint_spec.rb

@@ -509,11 +509,11 @@ def app
     end
 
     it 'can access parent attributes' do
-      get '/something/123/mount_space/456'
+      get '/something/123/another/456'
       expect(last_response.status).to eq 200
       json = JSON.parse(last_response.body, symbolize_names: true)
-      expect(json[:declared_params][:id]).to eq 123
       expect(json[:declared_params][:mount_space]).to eq 456
+      expect(json[:declared_params][:id]).to eq 123
     end
   end