db_create.py

#!/usr/bin/env python3
import sqlalchemy

from nyaa import create_app, models
from nyaa.extensions import db

app = create_app('config')

NYAA_CATEGORIES = [
    ('Anime', ['Anime Music Video', 'English-translated', 'Non-English-translated', 'Raw']),
    ('Audio', ['Lossless', 'Lossy']),
    ('Literature', ['English-translated', 'Non-English-translated', 'Raw']),
    ('Live Action', ['English-translated', 'Idol/Promotional Video', 'Non-English-translated', 'Raw']),
    ('Pictures', ['Graphics', 'Photos']),
    ('Software', ['Applications', 'Games']),
]


SUKEBEI_CATEGORIES = [
    ('Art', ['Anime', 'Doujinshi', 'Games', 'Manga', 'Pictures']),
    ('Real Life', ['Photobooks / Pictures', 'Videos']),
]


def add_categories(categories, main_class, sub_class):
    for main_cat_name, sub_cat_names in categories:
        main_cat = main_class(name=main_cat_name)
        for i, sub_cat_name in enumerate(sub_cat_names):
            # Composite keys can't autoincrement, set sub_cat id manually (1-index)
            sub_cat = sub_class(id=i+1, name=sub_cat_name, main_category=main_cat)
        db.session.add(main_cat)


if __name__ == '__main__':
    with app.app_context():
        # Test for the user table, assume db is empty if it's not created
        database_empty = False
        try:
            models.User.query.first()
        except (sqlalchemy.exc.ProgrammingError, sqlalchemy.exc.OperationalError):
            database_empty = True

        print('Creating all tables...')
        db.create_all()

        nyaa_category_test = models.NyaaMainCategory.query.first()
        if not nyaa_category_test:
            print('Adding Nyaa categories...')
            add_categories(NYAA_CATEGORIES, models.NyaaMainCategory, models.NyaaSubCategory)

        sukebei_category_test = models.SukebeiMainCategory.query.first()
        if not sukebei_category_test:
            print('Adding Sukebei categories...')
            add_categories(SUKEBEI_CATEGORIES, models.SukebeiMainCategory, models.SukebeiSubCategory)

        db.session.commit()

        if database_empty:
            print('Remember to run the following to mark the database up-to-date for Alembic:')
            print('./db_migrate.py stamp head')
            # Technically we should be able to do this here, but when you have
            # Flask-Migrate and Flask-SQA and everything... I didn't get it working.