Use native SQLAlchemy in Flask-DebugToolbar

Flask-DebugToolbar only works with Flask-SQLAlchemy.

If you’re using native sqlalchemy, it turns out it’s pretty simple to activate. Instantiate the class below with your sqlalchemy DB engine and flask app.

from flask.ext.sqlalchemy import _EngineDebuggingSignalEvents
_EngineDebuggingSignalEvents(engine, app.import_name).register()