Cannot disable defaults middleware

[coryasilva]

Actual:
req.body = { status: 'Draft' }

Expected:
req.body = {}

Steps to Repo:

1. Configure endpoint with this following doc:

   export const patch = [(req, res, next) => {
     console.log(req.body);
     res.status(204).end();
   }];
   
   patch.apiDoc = {
     "x-express-openapi-disable-defaults-middleware": true,
     requestBody: {
       required: true,
       "application/json": {
         schema: {
           additionalProperties: false,
           properties: {
             status: {
               type: "string",
               default: "Draft",
             },
           },
         },
       },
     },
   };

2. Console log the request body after making a PATCH command

   curl -X PATCH  --data '{}' -H "content-type: application/json" http://localhost:8080/blah/1

Thoughts:

• Was this caused by this PR
• I was trying to opt-out of defaults middleware as described here

[coryasilva]

Current workaround:

// Body Parser Middleware
app.use(express.json());

// Empty body annotation
app.use((req, _res, next) => {
  if (req.body) {
    /**
     * Annotates request if json body is empty before the schema defaults are
     * applied by the openapi framework's request validator middleware. Cannot
     * opt out of defaults while using the request validation middleware.
     * See issue: https://github.com/kogosoftwarellc/open-api/issues/903
     */
    req.bodyIsEmpty = Object.keys(req.body).length === 0;
  }
  next();
});