Lerndatenbank/lernplattform/models.py

from lernplattform import db

# Define a User model that represents the user table in the database
class User(db.Model):
    # Primary key column for the table, auto-incrementing integer
    id = db.Column(db.Integer, primary_key=True)
    # Username column with a maximum length of 20 characters, unique and not nullable
    username = db.Column(db.String(20), unique=True, nullable=False)
    # Email column with a maximum length of 120 characters, unique and not nullable
    email = db.Column(db.String(120), unique=True, nullable=False)
    # Password column with a maximum length of 60 characters, not nullable
    password = db.Column(db.String(60), nullable=False)

    # Magic method to represent the object as a string when printed or used in string context
    def __repr__(self):
        return f"User('{self.username}', '{self.email}')"

# Function to initialize the database by creating all tables defined in models if they do not exist
def initialize_database():
    from lernplattform import app
    # Create an application context before running operations on the database within this function
    with app.app_context():
        db.create_all()