oshipka/persistance/__init__.py

import os

from flask_sqlalchemy import SQLAlchemy

from config import SQLALCHEMY_DATABASE_URI, MAKEDIRS, DATABASE_FILE
from oshipka.persistance.populate import populate_db

db = SQLAlchemy()


def init_db(app):
    app.config["SQLALCHEMY_DATABASE_URI"] = SQLALCHEMY_DATABASE_URI
    app.config["SQLALCHEMY_TRACK_MODIFICATIONS"] = False

    db.init_app(app)
    for dir in MAKEDIRS:
        os.makedirs(dir, exist_ok=True)
    if not os.path.exists(DATABASE_FILE):
        with app.app_context():
            db.create_all()
            populate_db(app)