---
title: Errors API | ldapjs
---

# ldapjs Errors API

<div class="intro">

This document covers the ldapjs errors API and assumes that you are familiar
with LDAP. If you're not, read the [guide](guide.html) first.

</div>

All errors in the ldapjs framework extend from an abstract error type called
`LDAPError`. In addition to the properties listed below, all errors will have
a `stack` property correctly set.

In general, you'll be using the errors in ldapjs like:

```js
const ldap = require('ldapjs');

const db = {};

server.add('o=example', (req, res, next) => {
  const parent = req.dn.parent();
  if (parent) {
    if (!db[parent.toString()])
      return next(new ldap.NoSuchObjectError(parent.toString()));
  }
  if (db[req.dn.toString()])
    return next(new ldap.EntryAlreadyExistsError(req.dn.toString()));

  ...
});
```

I.e., if you just pass them into the `next()` handler, ldapjs will automatically
return the appropriate LDAP error message, and stop the handler chain.

All errors will have the following properties:

## code

Returns the LDAP status code associated with this error.

## name

The name of this error.

## message

The message that will be returned to the client.

# Complete list of LDAPError subclasses

* OperationsError
* ProtocolError
* TimeLimitExceededError
* SizeLimitExceededError
* CompareFalseError
* CompareTrueError
* AuthMethodNotSupportedError
* StrongAuthRequiredError
* ReferralError
* AdminLimitExceededError
* UnavailableCriticalExtensionError
* ConfidentialityRequiredError
* SaslBindInProgressError
* NoSuchAttributeError
* UndefinedAttributeTypeError
* InappropriateMatchingError
* ConstraintViolationError
* AttributeOrValueExistsError
* InvalidAttriubteSyntaxError
* NoSuchObjectError
* AliasProblemError
* InvalidDnSyntaxError
* AliasDerefProblemError
* InappropriateAuthenticationError
* InvalidCredentialsError
* InsufficientAccessRightsError
* BusyError
* UnavailableError
* UnwillingToPerformError
* LoopDetectError
* NamingViolationError
* ObjectclassViolationError
* NotAllowedOnNonLeafError
* NotAllowedOnRdnError
* EntryAlreadyExistsError
* ObjectclassModsProhibitedError
* AffectsMultipleDsasError
* OtherError