ojuso-map/apps/map/migrations/0066_copy_images_to_imagefiles.py

# -*- coding: utf-8 -*-
# Generated by Django 1.11.6 on 2018-05-26 15:48
from __future__ import unicode_literals

from django.db import migrations


def copy_images(apps, schema_editor):
    CaseStudy = apps.get_model("map", "CaseStudy")
    ImageFile = apps.get_model("files", "ImageFile")
    User = apps.get_model("auth", "User")

    for case_study in CaseStudy.objects.all():
        author = case_study.author
        if author is None:
            author = User.objects.get(username="root")

        imagefile = ImageFile(
            file=case_study.image,
            caption=case_study.image_caption,
            credit=case_study.image_credit,
            user=author,
        )
        imagefile.save()
        case_study.images.add(imagefile)


class Migration(migrations.Migration):

    dependencies = [("map", "0065_casestudy_images")]

    operations = [migrations.RunPython(copy_images, migrations.RunPython.noop)]