# Generated by Django 2.2.4 on 2019-09-23 15:05
from django.core.validators import EMPTY_VALUES
from django.db import migrations, models

from news.models import News


def migrate_data_forward(apps, schema_editor):
    for instance in News.objects.all():
        if instance.slug in EMPTY_VALUES:
            instance.slug = None
            instance.save(update_fields=['slug'])

def migrate_data_backward(apps, schema_editor):
    pass

class Migration(migrations.Migration):

    dependencies = [
        ('news', '0010_news_slug'),
    ]

    operations = [
        migrations.AlterField(
            model_name='news',
            name='slug',
            field=models.SlugField(null=True, verbose_name='News slug'),
        ),
        migrations.RunPython(
            migrate_data_forward,
            migrate_data_backward,
        ),
        migrations.AlterField(
            model_name='news',
            name='slug',
            field=models.SlugField(null=True, unique=True, verbose_name='News slug'),
        ),
    ]