Django で ImageField で画像を更新する時に変更前の画像を削除する場合のメモ

(Django1.5, Pyhton2.7)

修正：2013-09-01

models.py

def avatar_file_name(instance, filename):
    return os.path.join('avatar', str(instance.user.id), 'original', filename)

class Profile(models.Model):
    user = models.OneToOneField(User)
    avatar = models.ImageField(upload_to=avatar_file_name)

    def save(self, *args, **kwargs):
        try:
            original_profile = Profile.objects.get(pk=self.pk)
            if original_profile.avatar:
                original_profile.avatar.delete(save=False)

        except self.DoesNotExist:
            pass

       super(Profile, self).save(*args, **kwargs)

参考サイト

• image - Django: When saving, how can you check if a field has changed? - Stack Overflow
• python - Replacing a Django image doesn't delete original - Stack Overflow