# -*- coding: utf-8 -*- # Generated by Django 1.11.1 on 2017-07-07 18:05 from __future__ import unicode_literals from django.db import migrations def update_images_count(apps, schema_editor): Task = apps.get_model('app', 'Task') for t in Task.objects.all(): print("Updating {}".format(t)) t.images_count = t.imageupload_set.count() t.save() class Migration(migrations.Migration): dependencies = [ ('app', '0025_auto_20190220_1854'), ] operations = [ migrations.RunPython(update_images_count), ]