Misago/misago/categories/migrations/0002_default_categories.py

from django.db import migrations

from misago.core.utils import slugify


_ = lambda s: s


def create_default_categories_tree(apps, schema_editor):
    Category = apps.get_model('misago_categories', 'Category')

    Category.objects.create(
        special_role='private_threads',
        name='Private',
        slug='private',
        lft=1,
        rght=2,
        tree_id=0,
        level=0,
    )

    root = Category.objects.create(
        special_role='root_category',
        name='Root',
        slug='root',
        lft=3,
        rght=6,
        tree_id=1,
        level=0,
    )

    category_name = _("First category")

    Category.objects.create(
        parent=root,
        lft=4,
        rght=5,
        tree_id=1,
        level=1,
        name=category_name,
        slug=slugify(category_name),
    )


class Migration(migrations.Migration):

    dependencies = [
        ('misago_categories', '0001_initial'),
    ]

    operations = [
        migrations.RunPython(create_default_categories_tree),
    ]