Async/await mvc express problems handling errors with .catch() - node.js

Question

I'm trying to handle errors using express middleware, with these lines I have the following errors
user.js controller
app.post('/create', async (req, res, next) => {
const data = await User.create(req.body)
.catch((err) => next(err));
res.status(201).json({ ok: true, ...data });
});
user.js model
UserSchema.statics.create = async function createUser(data) {
delete data.role;
const user = await new this(data).save();
return { token: user.newToken(), user };
};
app.js
app.use((err, req, res, next) => {
res.status(err.code || 400);
res.json({ ok: false, err: err.message });
});
Errors
(node:3304) UnhandledPromiseRejectionWarning: Error [ERR_HTTP_HEADERS_SENT]: Cannot set headers after they are sent to the client
...
(node:3304) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag --unhandled-rejections=strict (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 9)
(node:3304) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
After to proof with try/catch in the user.js controller i don't have any error, but in the express documentation use try/catch is not recommended.
app.post('/create', async (req, res, next) => {
try {
const data = await User.create(req.body)
res.status(201).json({ ok: true, ...data });
} catch (err) {
next(err);
}
});
Any ideas?

Answer 1

You either use await or then/catch:
app.post('/create', async (req, res, next) => {
User.create(req.body)
.then(data => {
res.status(201).json({ ok: true, ...data });
})
.catch((err) => next(err));
});