# Generated by Django 3.2.14 on 2022-08-16 08:29

from django.db import migrations, models


def migrate_system_user_to_account(apps, schema_editor):
    connection_token_model = apps.get_model("authentication", "ConnectionToken")
    count = 0
    bulk_size = 10000

    while True:
        connection_tokens = connection_token_model.objects \
            .prefetch_related('system_user')[count:bulk_size]
        if not connection_tokens:
            break
        count += len(connection_tokens)
        updated = []
        for connection_token in connection_tokens:
            connection_token.account = connection_token.system_user.username
            updated.append(connection_token)
        connection_token_model.objects.bulk_update(updated, ['account'])


class Migration(migrations.Migration):

    dependencies = [
        ('authentication', '0011_auto_20220705_1940'),
    ]

    operations = [
        migrations.RemoveField(
            model_name='connectiontoken',
            name='application',
        ),
        migrations.RemoveField(
            model_name='connectiontoken',
            name='application_display',
        ),
        migrations.RemoveField(
            model_name='connectiontoken',
            name='system_user_display',
        ),
        migrations.AddField(
            model_name='connectiontoken',
            name='account',
            field=models.CharField(default='', max_length=128, verbose_name='Account'),
        ),
        migrations.RunPython(migrate_system_user_to_account),
        migrations.RemoveField(
            model_name='connectiontoken',
            name='system_user',
        ),
        migrations.RemoveField(
            model_name='connectiontoken',
            name='type',
        ),
    ]