nodejs express-validator: validate email format only if value exists

Question

I have following validation rules (nodejs, express-validator)

---------------------
check('email').not().isEmpty().withMessage('email is required'),
check('email').isEmail().withMessage('email not valid'),
---------------------

Now if I submit the form without an email address value it will have the following errors.

email is required 
email not valid

I want to check email format only if email value exists, so that only one error message will be there, either 'email is required' or 'email not valid'.

any suggestions?

Community · Accepted Answer · 2023-05-19 15:34:52Z

3

According to the documentation, .bail() can be used to stop running further validations if any of the previous ones in the chain have failed.

Try this:

check("email")
  .not()
  .isEmpty()
  .withMessage("email is required")
  .bail()
  // if email is empty, the following will not be run
  .isEmail()
  .withMessage("email not valid");

edited May 19, 2023 at 15:34

CommunityBot

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answered Feb 19, 2021 at 4:30

cbr

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