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77 lines
2.6 KiB
Python
77 lines
2.6 KiB
Python
5 years ago
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from django.core.exceptions import ValidationError
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from django.core.validators import (
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MaxLengthValidator, MaxValueValidator, MinLengthValidator,
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MinValueValidator,
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)
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from django.utils.deconstruct import deconstructible
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from django.utils.translation import gettext_lazy as _, ngettext_lazy
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class ArrayMaxLengthValidator(MaxLengthValidator):
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message = ngettext_lazy(
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'List contains %(show_value)d item, it should contain no more than %(limit_value)d.',
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'List contains %(show_value)d items, it should contain no more than %(limit_value)d.',
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'limit_value')
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class ArrayMinLengthValidator(MinLengthValidator):
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message = ngettext_lazy(
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'List contains %(show_value)d item, it should contain no fewer than %(limit_value)d.',
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'List contains %(show_value)d items, it should contain no fewer than %(limit_value)d.',
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'limit_value')
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@deconstructible
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class KeysValidator:
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"""A validator designed for HStore to require/restrict keys."""
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messages = {
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'missing_keys': _('Some keys were missing: %(keys)s'),
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'extra_keys': _('Some unknown keys were provided: %(keys)s'),
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}
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strict = False
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def __init__(self, keys, strict=False, messages=None):
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self.keys = set(keys)
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self.strict = strict
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if messages is not None:
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self.messages = {**self.messages, **messages}
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def __call__(self, value):
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keys = set(value)
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missing_keys = self.keys - keys
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if missing_keys:
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raise ValidationError(
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self.messages['missing_keys'],
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code='missing_keys',
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params={'keys': ', '.join(missing_keys)},
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)
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if self.strict:
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extra_keys = keys - self.keys
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if extra_keys:
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raise ValidationError(
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self.messages['extra_keys'],
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code='extra_keys',
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params={'keys': ', '.join(extra_keys)},
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)
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def __eq__(self, other):
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return (
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isinstance(other, self.__class__) and
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self.keys == other.keys and
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self.messages == other.messages and
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self.strict == other.strict
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)
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class RangeMaxValueValidator(MaxValueValidator):
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def compare(self, a, b):
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return a.upper is None or a.upper > b
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message = _('Ensure that this range is completely less than or equal to %(limit_value)s.')
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class RangeMinValueValidator(MinValueValidator):
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def compare(self, a, b):
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return a.lower is None or a.lower < b
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message = _('Ensure that this range is completely greater than or equal to %(limit_value)s.')
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