Hi, after I've searched online, and from this reply
<http://stackoverflow.com/questions/4394194/replacing-a-django-image-doesnt-delete-original#answer-8342249>I
have wrote this solution by overriding save method of my model class.
def save(self, force_insert=False, force_update=False, using=None,
update_fields=None):
# if an element exist
if self.id is not None:
current = MyModelClass.objects.get(id=self.id)
if self.image != current.image:
# Delete old image and thumbnail
current.image.delete(save=False) # Set save=False
because it's saving now.
super(MyModelClass, self).save(force_insert, force_update, using,
update_fields).
Simple!
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