92 lines
2.7 KiB
Python
92 lines
2.7 KiB
Python
from django.core.exceptions import ValidationError
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from django.core.validators import (
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MaxLengthValidator,
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MaxValueValidator,
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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 _
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from django.utils.translation import 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 "
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"%(limit_value)d.",
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"List contains %(show_value)d items, it should contain no more than "
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"%(limit_value)d.",
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"limit_value",
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)
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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 "
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"%(limit_value)d.",
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"List contains %(show_value)d items, it should contain no fewer than "
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"%(limit_value)d.",
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"limit_value",
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)
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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__)
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and self.keys == other.keys
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and self.messages == other.messages
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and 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 = _(
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"Ensure that the upper bound of the range is not greater than %(limit_value)s."
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)
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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 = _(
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"Ensure that the lower bound of the range is not less than %(limit_value)s."
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)
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