from django.db import migrations, models
import django.db.models.deletion


class Migration(migrations.Migration):

    dependencies = [
        ('schemes', '0003_rank'),
    ]

    operations = [
        migrations.AlterField(
            model_name='rank',
            name='scheme',
            field=models.ForeignKey(
                blank=True,
                null=True,
                on_delete=django.db.models.deletion.SET_NULL,
                related_name='ranks',
                to='schemes.scheme',
            ),
        ),
        migrations.AlterModelOptions(
            name='rank',
            options={'ordering': ['level_number', 'scheme_id']},
        ),
        migrations.AlterUniqueTogether(
            name='rank',
            unique_together=set(),
        ),
        migrations.AddConstraint(
            model_name='rank',
            constraint=models.UniqueConstraint(
                condition=models.Q(('scheme__isnull', True)),
                fields=('level_number',),
                name='uniq_global_rank_per_level',
            ),
        ),
        migrations.AddConstraint(
            model_name='rank',
            constraint=models.UniqueConstraint(
                condition=models.Q(('scheme__isnull', False)),
                fields=('scheme', 'level_number'),
                name='uniq_scheme_rank_per_level',
            ),
        ),
    ]