75 行
2.1 KiB
Python
75 行
2.1 KiB
Python
from django.db.models.signals import pre_delete, pre_save
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from django.dispatch import receiver
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from .models import BottomBar, Setting
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import os
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@receiver(pre_delete, sender=BottomBar)
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def bottombar_auto_delete_file_on_delete(instance: BottomBar, **kwargs):
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"""
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Deletes file from filesystem
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when corresponding `BottomBar` object is deleted.
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"""
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if instance.icon:
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if os.path.isfile(instance.icon.path):
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os.remove(instance.icon.path)
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@receiver(pre_save, sender=BottomBar)
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def bottombar_auto_delete_file_on_change(instance: BottomBar, **kwargs):
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"""
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Deletes old file from filesystem
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when corresponding `icon` object is updated
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with new file.
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"""
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if not instance.pk:
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return False
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try:
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old_file = BottomBar.objects.get(pk=instance.pk).icon
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except BottomBar.DoesNotExist:
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return False
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new_file = instance.icon
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if not old_file == new_file and old_file:
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if os.path.isfile(old_file.path):
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os.remove(old_file.path)
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@receiver(pre_delete, sender=Setting)
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def setting_auto_delete_file_on_delete(instance: Setting, **kwargs):
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"""
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Deletes file from filesystem
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when corresponding `Settings` object is deleted.
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"""
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if instance.page_image.path.endswith(instance.page_image.field.default):
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return False
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if instance.page_image:
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if os.path.isfile(instance.page_image.path):
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os.remove(instance.page_image.path)
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@receiver(pre_save, sender=Setting)
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def setting_auto_delete_file_on_change(instance: Setting, **kwargs):
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"""
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Deletes old file from filesystem
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when corresponding `page_image` object is updated
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with new file.
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"""
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if not instance.pk:
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return False
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try:
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old_file = Setting.objects.get(pk=instance.pk).page_image
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except Setting.DoesNotExist:
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return False
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if old_file.path.endswith(instance.page_image.field.default):
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return False
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new_file = instance.page_image
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if not old_file == new_file:
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if os.path.isfile(old_file.path):
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os.remove(old_file.path)
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