I want to add a new table in existing database without affecting existing tables and its datas. After adding new model class into models.py, what are steps needs to follow to add new table?
Once you've added the new model in your models.py, you just need to run db.create_all(). You can add this in your code somewhere (probably directly) after you initialize your app/database. Be sure to include with app.app_context() if you aren't calling create_all in a view. Hope this helps!
How to add new table in existing database of flask app using sqlalchemy?