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Source code for django.contrib.postgres.validators

import copy

from django.core.exceptions import ValidationError
from django.core.validators import (
    MaxLengthValidator, MaxValueValidator, MinLengthValidator,
    MinValueValidator,
)
from django.utils.deconstruct import deconstructible
from django.utils.translation import ugettext_lazy as _, ungettext_lazy


class ArrayMaxLengthValidator(MaxLengthValidator):
    message = ungettext_lazy(
        'List contains %(show_value)d item, it should contain no more than %(limit_value)d.',
        'List contains %(show_value)d items, it should contain no more than %(limit_value)d.',
        'limit_value')


class ArrayMinLengthValidator(MinLengthValidator):
    message = ungettext_lazy(
        'List contains %(show_value)d item, it should contain no fewer than %(limit_value)d.',
        'List contains %(show_value)d items, it should contain no fewer than %(limit_value)d.',
        'limit_value')


[docs]@deconstructible class KeysValidator(object): """A validator designed for HStore to require/restrict keys.""" messages = { 'missing_keys': _('Some keys were missing: %(keys)s'), 'extra_keys': _('Some unknown keys were provided: %(keys)s'), } strict = False def __init__(self, keys, strict=False, messages=None): self.keys = set(keys) self.strict = strict if messages is not None: self.messages = copy.copy(self.messages) self.messages.update(messages) def __call__(self, value): keys = set(value.keys()) missing_keys = self.keys - keys if missing_keys: raise ValidationError(self.messages['missing_keys'], code='missing_keys', params={'keys': ', '.join(missing_keys)}, ) if self.strict: extra_keys = keys - self.keys if extra_keys: raise ValidationError(self.messages['extra_keys'], code='extra_keys', params={'keys': ', '.join(extra_keys)}, ) def __eq__(self, other): return ( isinstance(other, self.__class__) and (self.keys == other.keys) and (self.messages == other.messages) and (self.strict == other.strict) ) def __ne__(self, other):
return not (self == other)
[docs]class RangeMaxValueValidator(MaxValueValidator): compare = lambda self, a, b: a.upper > b
message = _('Ensure that this range is completely less than or equal to %(limit_value)s.')
[docs]class RangeMinValueValidator(MinValueValidator): compare = lambda self, a, b: a.lower < b
message = _('Ensure that this range is completely greater than or equal to %(limit_value)s.')
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