How to use post_save signal ?

Hi all

I am using Django-1.2.5 and i want to use post_save signal in the following problem/task.

I have :-
models.py

image = models.ImageField(.....)
remove_image = models.BooleanField()

Now i want  :-

1) When the user uploads the file , the file path appears on the imageField like this.

Currently: images/testimonial-bottom_1.png

Change:

I want to give the option to delete the file .So i made a field called remove image which is a checkbox . Now when the user clicks that remove_image checkbox and press save the image should get deleted. I was going through the documentation and believe that this problem could be solved by using post_save signal


I have not used signals so need help ,


def delete_old_image(sender, instance, using=None,*args, **kwargs):
    try:
        old_record = sender.objects.get(pk=instance.pk)
        old_record.delete()
    except sender.DoesNotExist:
        pass
signals.post_save.connect(delete_old_image, sender=Trip)

How can i achieve this task by using signals or without signals.

Any help will be appreciated.


--
Regards
Nikhil Verma
+91-958-273-3156

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