How do I create models in Flask?

How do I create models in Flask?

To create models in Flask, you typically use SQLAlchemy. First, install Flask-SQLAlchemy, then define your model classes.

Can you show me an example of a simple model?

Sure! Here's a basic example:

from flask_sqlalchemy import SQLAlchemy

db = SQLAlchemy()

class User(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    username = db.Column(db.String(80), unique=True, nullable=False)
    email = db.Column(db.String(120), unique=True, nullable=False)

What are the steps to set up Flask-SQLAlchemy?

First, install Flask-SQLAlchemy using pip. Then, initialize it in your Flask app and configure your database URI.

How do I run migrations for my models?

You can use Flask-Migrate for handling migrations. Install it, then use commands like flask db init, flask db migrate, and flask db upgrade.