Image not deleted

[zerc]

Assume we have a Photo model like this:

# myapp/models.py
from pyuploadcare.dj import ImageField
class Photo(models.Model):
    image = ImageField(validators=[size_validator, extension_validator])

Then we delete it from our database. But file in cdn still alive. It easy to reproduce:

>>> from myapp.models import *
>>> a = Photo.objects.get(pk=23)
>>> a.image.cdn_url
u'https://ucarecdn.com/1ada3776-40fd-4193-8aa1-00955a50a26c/'
>>> a.delete()
>>> a.pk
>>> a.image.cdn_url
u'https://ucarecdn.com/1ada3776-40fd-4193-8aa1-00955a50a26c/'

Photo object was successful deleted from database. But image.cdn_url still active.

The solution what i see is subscribe on post_delete signal inside Field.contribute_to_class method's and execute File.delete.

But i think in some cases it right behaviour (e.g. backup). For this case we can specify setting e.g. PYUPLOADCARE_REMOVE_FILES which will be turn on this functionality.

[dmitry-mukhin]

This represents how Django is working with local files.
Cleaning up is user's job.

We may add an optional hook to do that.