49 lines
1.4 KiB
Python
49 lines
1.4 KiB
Python
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import os
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import shutil
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import uuid
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from django.db import models
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from django.dispatch import receiver
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from .models import Exercice
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from api.settings import MEDIA_ROOT
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# These two auto-delete files from filesystem when they are unneeded:
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@receiver(models.signals.post_delete, sender=Exercice)
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def auto_delete_file_on_delete(sender, instance, **kwargs):
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"""
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Deletes file from filesystem
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when corresponding `MediaFile` object is deleted.
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"""
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print(instance, instance.exo_model.path, instance.id_code)
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if instance.exo_model:
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if os.path.isfile(instance.exo_model.path):
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os.remove(instance.exo_model.path)
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if os.path.isdir(f'{MEDIA_ROOT}/uploads/exercices/exo_{instance.id_code}'):
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shutil.rmtree(f'{MEDIA_ROOT}/uploads/exercices/exo_{instance.id_code}')
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#os.rmdir(f'{MEDIA_ROOT}/uploads/exercices/exo_{instance.id_code}')
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@receiver(models.signals.pre_save, sender=Exercice)
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def auto_delete_file_on_change(sender, instance, **kwargs):
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"""
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Deletes old file from filesystem
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when corresponding `MediaFile` 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 = Exercice.objects.get(id_code=instance.id_code).exo_model
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except Exercice.DoesNotExist:
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return False
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new_file = instance.exo_model
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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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