mirror of
https://github.com/Hopiu/django-model-utils.git
synced 2026-03-17 04:10:24 +00:00
37 lines
1 KiB
Python
37 lines
1 KiB
Python
from __future__ import annotations
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from typing import Any
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from django.db import models
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from django.db.backends.base.base import BaseDatabaseWrapper
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def mutable_from_db(value: object) -> Any:
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if value == '':
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return None
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try:
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if isinstance(value, (str,)):
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return [int(i) for i in value.split(',')]
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except ValueError:
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pass
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return value
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def mutable_to_db(value: object) -> str:
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if value is None:
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return ''
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if isinstance(value, list):
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value = ','.join(str(i) for i in value)
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return str(value)
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class MutableField(models.TextField):
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def to_python(self, value: object) -> Any:
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return mutable_from_db(value)
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def from_db_value(self, value: object, expression: object, connection: BaseDatabaseWrapper) -> Any:
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return mutable_from_db(value)
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def get_db_prep_save(self, value: object, connection: BaseDatabaseWrapper) -> str:
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value = super().get_db_prep_save(value, connection)
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return mutable_to_db(value)
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