Firstly, I'm following the Python Flask tutorial posted here: https://scotch.io/tutorials/build-a-crud-web-app-with-python-and-flask-part-one.
Everything was working smoothly up to the 'Migration' section where executing:
$ flask db init
... failed with the following error:
Usage: flask db init [OPTIONS]
Error: The file/path provided (run) does not appear to exist. Please verify the path is correct. If app is not on PYTHONPATH, ensure the extension is .py
I know the $FLASK_APP env variable is set because this command executes fine:
$ flask run
Can anyone suggest why this executes fine when running the app, but not when trying to create the migration repository?
The closest I can find elsewhere on the subject is here: Flask can't find app file, but pre-pending with python -m
isn't working in either case for me here.
The command
flask run
started the app successfully.The command
flask db init
failed with the error reported in the question.So I tried
python run.py
and this failed to start the app by reporting an unmet dependency inmodels.py
which was in fact a typo in an import. Fixing the typo and rerunningpython run.py
was successful.Then I tried
flask run
again, still fine. Thenflask db init
... finally success.It appears the error reported that it could not find
run.py
is either misleading or masking the true root cause of why it could execute.