Display specific error message of Validation Error message with node js

Question

How to display a specific error message from a Validation Error. I already display the error with this line of code return res.render("register", {error: err.message}); and show this error ValidationError: User validation failed: email: Email already exists
But it is showing my column field name 'email' and I don't wanna do that. Below is the whole error and I only want to display this message: 'Email already exists'
Ignore the location D: i removed my file directory

    ValidationError: User validation failed: email: Email already exists
    at ValidationError.inspect  
  errors:
   { email:
      { ValidatorError: Email already exists
          at new ValidatorError (D:)
          at validate (D:)
          at D:
          at process._tickCallback (internal/process/next_tick.js:68:7)
        message: 'Email already exists',
        name: 'ValidatorError',
        properties: [Object],
        kind: 'user defined',
        path: 'email',
        value: '[email protected]',
        reason: undefined,
        [Symbol(mongoose:validatorError)]: true } },
  _message: 'User validation failed',
  name: 'ValidationError' }

Rajesh Solanki · Accepted Answer · 2022-07-04 06:14:20Z

2

To get a specific error message of Validation Error you can use mapped() function like below.

const errors = validationResult(req);
if (!errors.isEmpty()) {
    console.log(errors.mapped().email.msg);
}

answered Jul 4, 2022 at 6:14

Rajesh Solanki

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Comments

EN EN · Accepted Answer · 2019-11-21 03:55:37Z

0

To access nested error message do this err.errors.email.message

answered Nov 21, 2019 at 3:55

EN EN

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Purushoth.Kesav · Accepted Answer · 2019-11-21 10:04:27Z

0

Simply create one temp variable and structure your message,

let err_msg = err.errors.email.message;

which will give: 'Email already exists'

You can leave user validation failed message, since same message may be repeated for all validations.

edited Nov 21, 2019 at 10:04

answered Nov 21, 2019 at 2:54

Purushoth.Kesav

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3 Comments

EN EN Over a year ago

When i add email.message to the err.message it gives me Cannot read property 'message' of undefined

EN EN Over a year ago

Did try it got undefined.

Purushoth.Kesav Over a year ago

try to print err object then get towards your email message that should work :) console.log(err); or console.log(JSON.stringify(err)); err{ message: 'er message', email:{ message:' here is the message which you need' } }

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