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tigrqc.extensions

Create and configure all needed extensions.

Base

Bases: DeclarativeBase

DeclarativeBase for flask-sqlalchemy type hints.

Source code in tigrqc/extensions.py
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class Base(DeclarativeBase):
    """DeclarativeBase for flask-sqlalchemy type hints.
    """

init_extensions

Python
init_extensions(app: Flask) -> None

Initialize all extensions.

Source code in tigrqc/extensions.py
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def init_extensions(app: Flask) -> None:
    """Initialize all extensions.
    """
    csrf.init_app(app)

    db.init_app(app)
    register_sqlite_foreign_key_enforcement(app, db)

    enc.init_app(app)

    set_anon_user(app, lm)
    lm.init_app(app)

register_sqlite_foreign_key_enforcement

Python
register_sqlite_foreign_key_enforcement(
    app: Flask, app_db: SQLAlchemy
) -> None

Turn on foreign key enforcement for sqlite connections.

By default, for some legacy reasons, sqlite databases don't actually pay attention to foreign key constraints. This will ensure every sqlite connection turns on foreign key constraints.

Source code in tigrqc/extensions.py
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def register_sqlite_foreign_key_enforcement(
        app: Flask, app_db: SQLAlchemy
) -> None:
    """Turn on foreign key enforcement for sqlite connections.

    By default, for some legacy reasons, sqlite databases don't actually
    pay attention to foreign key constraints. This will ensure every sqlite
    connection turns on foreign key constraints.
    """
    with app.app_context():
        if app_db.engine.dialect.name != 'sqlite':
            return

        @event.listens_for(app_db.engine, 'connect')
        def set_sqlite_foreign_keys_on(dbapi_connection, _):
            cursor = dbapi_connection.cursor()
            cursor.execute('PRAGMA foreign_keys=ON')
            cursor.close()