[FIXED] Compress images with Pillow in Django

Issue

I have a project with Django and I use Pillow to store images in some models, but I want those images to be stored compressed. How can I instruct Pillow to compress the images when they are saved to a model ImageField?

This is an example of a model with an ImageField:

class Photo(models.Model):
    name = models.CharField(max_length=100, null=True, blank=True, verbose_name=_("Name"))
    album = models.ForeignKey(Album, on_delete=models.PROTECT, related_name='photos', verbose_name=_("Album"))
    photo = models.ImageField(verbose_name=_("Photo"))

    class Meta:
        verbose_name = _("Photo")
        verbose_name_plural =_("Photos")

    def __str__(self):
        return "[{}] {}".format(self.pk, self.name)

I can see the file once stored, and I can see it has the same size than the original source file.

I am using Django Rest Framework to get images from the front-end.

Solution

You can override save method of the model:

from PIL import Image

class Photo(models.Model):
    name = models.CharField(max_length=100, null=True, blank=True, verbose_name=_("Name"))
    album = models.ForeignKey(Album, on_delete=models.PROTECT, related_name='photos', verbose_name=_("Album"))
    photo = models.ImageField(verbose_name=_("Photo"))

    def save(self, *args, **kwargs):
       instance = super(Photo, self).save(*args, **kwargs)
       image = Image.open(instance.photo.path)
       image.save(instance.photo.path,quality=20,optimize=True)
       return instance

Answered By - ruddra