Middleware for catching validation errors

We define a lot of different rules across multiple files and wanted to have a single middleware to handle all express-validator errors. So we came up with putting this in the express app like:

    this.app.use((req, res, next) => {
        const errors = validationResult(req);
        if (!errors.isEmpty()) {
          return res.status(400).json({ errors: errors.array() });
        }
        next();
    });

As the validations are provided on the routes they seem to be undefined at hat point in the chain. Is there a clean way to have the response handling for errors in a centralized way?

[edwinnnss]

I also tried to have a single middleware, but not work
And then I create something like:

const MiddlewareValidation = require('../middlewares/Validation')

const combineValidationMiddleware = validation => [validation, MiddlewareValidation]

app.post('/users', combineValidationMiddleware(UserController.validateStore), UserController.store)

[spech66]

Thank you. We implemented this as suggested. Works stable for quite some time.