Django image resizing and convert before upload

Question

I searched a lot on this subject but couldn\'t really find what I need. I\'ll explain my problem :

On my website, the user can upload an image. I need to resize this

Answer 1

This Worked for me try it. I am using Django 2.0.6 and Python 3.6.4

from django.db import models
from PIL import Image
from io import BytesIO
from django.core.files.uploadedfile import InMemoryUploadedFile

class ImageUpload(models.Model):
    name = models.CharField(max_length=100)
    uploadedImage = models.ImageField(upload_to='Uploads/%Y/%m/', db_column="Upload an Image")
    def save(self, *args, **kwargs):
        imageTemproary = Image.open(self.uploadedImage)
        outputIoStream = BytesIO()
        imageTemproaryResized = imageTemproary.resize( (1020,573) ) 
        imageTemproaryResized.save(outputIoStream , format='JPEG', quality=85)
        outputIoStream.seek(0)
        self.uploadedImage = InMemoryUploadedFile(outputIoStream,'ImageField', "%s.jpg" %self.uploadedImage.name.split('.')[0], 'image/jpeg', sys.getsizeof(outputIoStream), None)
        super(ImageUpload, self).save(*args, **kwargs)