mirror of
https://github.com/SectorLabs/django-localized-fields.git
synced 2025-10-31 10:48:56 +03:00
69 lines
2.4 KiB
Python
69 lines
2.4 KiB
Python
from typing import Optional, Union, Dict
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from django.conf import settings
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from django.db.utils import IntegrityError
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from .field import LocalizedField
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from ..value import LocalizedValue, LocalizedIntegerValue
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class LocalizedIntegerField(LocalizedField):
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"""Stores integers as a localized value."""
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attr_class = LocalizedIntegerValue
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@classmethod
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def from_db_value(cls, value, *_) -> Optional[LocalizedIntegerValue]:
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db_value = super().from_db_value(value)
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if db_value is None:
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return db_value
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# if we were used in an expression somehow then it might be
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# that we're returning an individual value or an array, so
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# we should not convert that into an :see:LocalizedIntegerValue
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if not isinstance(db_value, LocalizedValue):
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return db_value
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return cls._convert_localized_value(db_value)
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def to_python(self, value: Union[Dict[str, int], int, None]) -> LocalizedIntegerValue:
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"""Converts the value from a database value into a Python value."""
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db_value = super().to_python(value)
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return self._convert_localized_value(db_value)
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def get_prep_value(self, value: LocalizedValue) -> dict:
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"""Gets the value in a format to store into the database."""
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prepped_value = super().get_prep_value(value)
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if prepped_value is None:
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return None
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# make sure all values are proper integers
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for lang_code, _ in settings.LANGUAGES:
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try:
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if prepped_value[lang_code] is not None:
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int(prepped_value[lang_code])
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except (TypeError, ValueError):
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raise IntegrityError('non-integer value in column "%s.%s" violates '
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'integer constraint' % (self.name, lang_code))
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return prepped_value
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@staticmethod
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def _convert_localized_value(value: LocalizedValue) -> LocalizedIntegerValue:
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"""Converts from :see:LocalizedValue to :see:LocalizedIntegerValue."""
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integer_values = {}
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for lang_code, _ in settings.LANGUAGES:
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local_value = value.get(lang_code, None)
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if local_value is None or local_value.strip() == '':
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local_value = None
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try:
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integer_values[lang_code] = int(local_value)
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except (ValueError, TypeError):
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integer_values[lang_code] = None
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return LocalizedIntegerValue(integer_values)
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