---
title: "Validators"
version: 5.0
locale: el
source: https://docs.djangoproject.com/el/5.0/ref/contrib/postgres/validators/
canonical: https://djangodocs.dev/el/5.0/ref/contrib/postgres/validators/
---
# Validators

These validators are available from the `django.contrib.postgres.validators`
module.

## `KeysValidator`

#### `class KeysValidator(keys, strict=False, messages=None)`

Validates that the given keys are contained in the value. If `strict` is
`True`, then it also checks that there are no other keys present.

The `messages` passed should be a dict containing the keys
`missing_keys` and/or `extra_keys`.

> **Note**
>
> Note that this checks only for the existence of a given key, not that
> the value of a key is non-empty.

## Range validators

### `RangeMaxValueValidator`

#### `class RangeMaxValueValidator(limit_value, message=None)`

Validates that the upper bound of the range is not greater than
`limit_value`.

### `RangeMinValueValidator`

#### `class RangeMinValueValidator(limit_value, message=None)`

Validates that the lower bound of the range is not less than the
`limit_value`.