在eclipse中添加maven依赖项(Adding maven dependencies in eclipse)

 您还可以使用django-cleanup ，它会在您删除模型时自动调用FileField上的delete方法。 
 
pip install django-cleanup
 
 settings.py 
 
INSTALLED_APPS = (
     ...
    'django_cleanup', # should go after your apps
)

Ok got it working with adding delete(save=False):
 
# These two auto-delete files from filesystem when they are unneeded:
@receiver(models.signals.post_delete, sender=ImageModel)
def auto_delete_file_on_delete(sender, instance, **kwargs):
    """Deletes file from filesystem
    when corresponding `ImageModel` object is deleted.
    """
    if instance.imagefile:
        thumbmanager = get_thumbnailer(instance.imagefile)
        thumbmanager.delete(save=False)