Validators
KeysValidator
 - 
class KeysValidator(keys, strict=False, messages=None)[source] - 
Validates that the given keys are contained in the value. If
strictisTrue, then it also checks that there are no other keys present.The
messagespassed should be a dict containing the keysmissing_keysand/orextra_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
- 
class RangeMaxValueValidator(limit_value, message=None)[source] - 
Validates that the upper bound of the range is not greater than
limit_value. 
- 
class RangeMinValueValidator(limit_value, message=None)[source] - 
Validates that the lower bound of the range is not less than the
limit_value. 
    © Django Software Foundation and individual contributors
Licensed under the BSD License.
    https://docs.djangoproject.com/en/1.8/ref/contrib/postgres/validators/