This gist contains a Django model for compressing images on save. The model can be used to save compressed images to a different directory, which can help to reduce the storage space required for your images and improve the performance of your website.

saving_compress_image_django.py

from django.db import models
from django.db.models.signals import post_save
from django.dispatch import receiver
from PIL import Image
from io import BytesIO
from django.core.files.uploadedfile import InMemoryUploadedFile

class CompressedImage(models.Model):
    original_image = models.ImageField(upload_to='images/')
    compressed_image = models.ImageField(upload_to='images/compressed/', blank=True)

@receiver(post_save, sender=CompressedImage)
def compress_image_on_save(sender, instance, **kwargs):
    if instance.original_image:
        # Open the original image using Pillow
        image = Image.open(instance.original_image.path)

        # Compress the image using the provided function
        compressed_image = compress_image(image)

        # Create an in-memory buffer to save the compressed image
        buffer = BytesIO()
        compressed_image.save(buffer, format='JPEG')

        # Save the compressed image to the compressed_image field
        instance.compressed_image.save(instance.original_image.name, InMemoryUploadedFile(
            buffer, None, instance.original_image.name, 'image/jpeg', buffer.tell(), None
        ), save=False)