setup method 'shell_context_processor' can no longer be called

[HLFH]

New setupmethod behaviour for flask 2.2.0: pallets/flask#4577

With:

make devtest

We get:

    raise AssertionError(
AssertionError: The setup method 'shell_context_processor' can no longer be called on the application. It has already handled its first request, any changes will not be applied consistently.
Make sure all imports, decorators, functions, etc. needed to set up the application are done before running it.

EDIT:

pip3.9 uninstall coverage
pip install -r requirements-ci.txt

[HLFH]

Flask downgrade removed.

Fixed by: 5158b6e
Flask issue to request doc: pallets/flask#4868

We had to define the app object within the basic application factory create_app.

If you move the creation of the application object into a function, you can then create multiple instances of this app later.

So why would you want to do this?

Testing. You can have instances of the application with different settings to test every case.

Multiple instances. Imagine you want to run different versions of the same application. Of course you could have multiple instances with different configs set up in your webserver, but if you use factories, you can have multiple instances of the same application running in the same application process which can be handy.