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node.jsexpressmiddleware

Express middleware issue callback issue

I got this middleware.

const validateInput = (req, res, next) => {
 return console.log(req.body);
};

When I run my server I get this error:

Error: Route.post() requires a callback function but got a [object Undefined]

If I change the middleware to return a function like so:

const validateInput = (req, res, next) => {
 return () => console.log(req.body);
};

It runs but the console.log print undefined.

What am I missing about express rules here? (To be clear, the middleware before this one does have a next() that should pass req)

Solution

  • Why did you return? if you could give route section that would be great to debug.

    if you use like this?

      const middleware = (req, res, next) => {
    console.log(req.body)
    next();
  };
  route.get('/' middleware, controller);