DJango CheatSheet

Auto Delete Image from Database
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from django.db import models
from django.db.models.signals import post_delete
from django.dispatch import receiver  # Make sure this is imported
import os

class Portfolio(models.Model):  # Corrected model name capitalization
    title = models.CharField(max_length=100)
    description = models.CharField(max_length=1000)
    image = models.ImageField(upload_to='portfolios/')

    def save(self, *args, **kwargs):
        try:
            # Check if the instance already exists in the database
            old_instance = Portfolio.objects.get(pk=self.pk)
            if old_instance.image and old_instance.image != self.image:
                # Delete the old image file
                if os.path.isfile(old_instance.image.path):
                    os.remove(old_instance.image.path)
        except Portfolio.DoesNotExist:
            pass  # If instance does not exist, no old file to delete
        super().save(*args, **kwargs)

    def __str__(self):
        return self.title

@receiver(post_delete, sender=Portfolio)  # Ensure this refers to the correct model
def delete_image_file(sender, instance, **kwargs):
    if instance.image:
        if os.path.isfile(instance.image.path):
            os.remove(instance.image.path)