express-validator 4 not working

Question

Im trying to use express-validator v4.3.0 to validate inputs to validate express inputs. I tried to follow the documentation but can't get it to work... It's not detecting any errors. Also it stalls in the route. I guess I'm missing the next() function call. What am I missing?

This is my route:

routes.get(
  "/localizations/apps/:app_name/locales/:locale_abbr_short",
  validateParams,
  fetchLocalization,
)

This is validateParams:

export async function validateParams() {
  const allowedAppNames = ['common','webcalc_v2']
  const allowedLocales= ['dk']

  return [
    check('app_name').isIn(allowedAppNames).withMessage('App name is unknown').trim(),
    check('locale_abbr_short').isIn(allowedLocales).withMessage('Locale is unknown').trim(),
    check('provider').isNumeric().withMessage('Provider id must be a number').trim(),
  ]
}

Answer 1

You have to call the validateParams function in order to return an array of validation middlewares:

routes.get(
    "/localizations/apps/:app_name/locales/:locale_abbr_short",
    validateParams(),
    fetchLocalization,
)