[3.0.0a2] connexion example not working

[drummerwolli]

Description

I'm setting up a new connexion project, and i want to directly use version 3.0.0 to not have later a costly migration. so for now, its okay to use a non-production version. But I get an import error. so i checked the most basic example, but i still get the same error.

Expected behaviour

the example project just works with the latest 3.0.0 alpha version.

Actual behaviour

I get an import error:

Traceback (most recent call last):
  File "/home/fhalkivaha/GIT/connexion-example/app.py", line 52, in <module>
    app.run(port=8080, server='gevent')
  File "/home/fhalkivaha/.pyenv/versions/3.10.6/envs/venv-3.10-1/lib/python3.10/site-packages/connexion/apps/abstract.py", line 243, in run
    self.middleware.run(import_string, **kwargs)
  File "/home/fhalkivaha/.pyenv/versions/3.10.6/envs/venv-3.10-1/lib/python3.10/site-packages/connexion/middleware/main.py", line 324, in run
    uvicorn.run(app, **kwargs)
  File "/home/fhalkivaha/.pyenv/versions/3.10.6/envs/venv-3.10-1/lib/python3.10/site-packages/uvicorn/main.py", line 445, in run
    config = Config(app, **kwargs)
TypeError: Config.__init__() got an unexpected keyword argument 'server'

Steps to reproduce

1. git clone git@github.com:hjacobs/connexion-example.git
2. cd connexion-example
3. rm Pipfile && rm Pipfile.lock (we gonna use poetry)
4. add this basic poetry file (created with poetry init):

[tool.poetry]
name = "connexion-example"
version = "0.1.0"
description = ""
authors = ["fhalkivaha <fabian@zalando.de>"]
readme = "README.md"
packages = [{include = "connexion_example"}]

[tool.poetry.dependencies]
python = "^3.10"


[build-system]
requires = ["poetry-core"]
build-backend = "poetry.core.masonry.api"

5. poetry add connexion --allow-prereleases -E flask -E uvicorn
6. poetry run python3 app.py

Additional info:

I'm using poetry version 1.4.0.

Output of the commands:

• poetry run python3 --version : Python 3.10.6
• connexion commit used: cd64611

[drummerwolli]

i just saw that #1648 was merged just two weeks ago, and i would need that. so even more a reason to use 3.0.0 🥳

[RobbeSneyders]

Hi @drummerwolli,

ModuleNotFoundError: Please install connexion using the 'flask' extra

Can you try:

pip install --pre connexion[flask]

[drummerwolli]

i'm using poetry, so cant use pip. but i found now finally the flag for poetry to install pre-packages: poetry add connexion --allow-prereleases --extras "flask"

but now i get a different import error:

    import uvicorn
ModuleNotFoundError: No module named 'uvicorn'

(adjusted the original issue text above)

[RobbeSneyders]

There's also an extra for uvicorn, but we should make the error more clear.

[drummerwolli]

yeah, also just saw that. i added now the uvicorn package: poetry add connexion --allow-prereleases -E flask -E uvicorn

but now i get:

Traceback (most recent call last):
  File "/home/fhalkivaha/GIT/connexion-example/app.py", line 52, in <module>
    app.run(port=8080, server='gevent')
  File "/home/fhalkivaha/.pyenv/versions/3.10.6/envs/venv-3.10-1/lib/python3.10/site-packages/connexion/apps/abstract.py", line 243, in run
    self.middleware.run(import_string, **kwargs)
  File "/home/fhalkivaha/.pyenv/versions/3.10.6/envs/venv-3.10-1/lib/python3.10/site-packages/connexion/middleware/main.py", line 324, in run
    uvicorn.run(app, **kwargs)
  File "/home/fhalkivaha/.pyenv/versions/3.10.6/envs/venv-3.10-1/lib/python3.10/site-packages/uvicorn/main.py", line 445, in run
    config = Config(app, **kwargs)
TypeError: Config.__init__() got an unexpected keyword argument 'server'

[RobbeSneyders]

uvicorn does not accept a server keyword argument.

[drummerwolli]

ah, i see now the server key argument in the app.run. removing that works just fine! thanks ❤️