CODEWITHSUNDEEP
pythonflask
Kazee
Kazee

Reputation: 51

In Flask application what is the difference between @app.teardown_request and @app.teardown_appcontext?

I was going through a flask application and found the use of @app.teardown_request. Can anyone please demystify the real reason of using @app.teardown_request rather than @app.teardown_appcontext?

In other words what exactly is the difference?

Upvotes: 4

Views: 2612

Answers (2)

CodeMantle
CodeMantle

Reputation: 1426

@app.teardown_request Called after the request is dispatched and the response is returned, right before the request context is popped.

@app.teardown_appcontext Registers a function to be called when the application context is popped. The application context is typically popped after the request context for each request, at the end of CLI commands, or after a manually pushed context ends.

There is a definitive timing and scope difference.

Upvotes: 1

Raed Ali
Raed Ali

Reputation: 587

@app.teardown_appcontext - Bind a function after each request, even if an exception is encountered.

@app.teardown_request - Registers a function to be called at the end of each request whether it was successful or an exception was raised. It is a good place to cleanup request scope objects like a database session/transaction.

https://github.com/pallets/flask-sqlalchemy/issues/379

Upvotes: 2

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