# Generated by Django 2.2.7 on 2020-01-28 17:46 from django.db import migrations, models import django.db.models.deletion import django.utils.timezone def make_relations(apps, schemaeditor): PartnerToEstablishment = apps.get_model('partner', 'PartnerToEstablishment') Partner = apps.get_model('partner', 'Partner') Establishment = apps.get_model('establishment', 'Establishment') touched_partners_ids = [] for establishment in Establishment.objects.filter(partners__isnull=False): for related_partner in establishment.partners.all(): real_partner = Partner.objects.filter(name=related_partner.name, type=related_partner.type, url=related_partner.url).first() touched_partners_ids.append(related_partner.pk) PartnerToEstablishment(establishment=establishment, partner=real_partner, partner_bind_date=real_partner.created).save() class Migration(migrations.Migration): dependencies = [ ('establishment', '0083_establishment_instagram'), ('partner', '0003_auto_20191121_1059'), ] operations = [ migrations.CreateModel( name='PartnerToEstablishment', fields=[ ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')), ('partner_bind_date', models.DateTimeField(default=django.utils.timezone.now, editable=False, verbose_name='Date partner binded')), ('establishment', models.ForeignKey(null=True, on_delete=django.db.models.deletion.CASCADE, to='establishment.Establishment')), ('partner', models.ForeignKey(null=True, on_delete=django.db.models.deletion.CASCADE, to='partner.Partner')), ], ), migrations.AddField( model_name='partner', name='establishments', field=models.ManyToManyField(null=True, related_name='new_partners', through='partner.PartnerToEstablishment', to='establishment.Establishment', verbose_name='Establishments'), ), migrations.RunPython(make_relations, migrations.RunPython.noop), ]