type object Employee has no attribute connection

[bjellesma]

Hi,
I'm following the tutorial on https://docs.graphene-python.org/projects/sqlalchemy/en/latest/tutorial/ and I'm receiving the following error when I run my flask app

AttributeError: type object 'Employee' has no attribute 'connection'

The same will happen for the department object.

I'm using pipenv

[[source]]
name = "pypi"
url = "https://pypi.org/simple"
verify_ssl = true

[dev-packages]

[packages]
flask = "*"
flask-socketio = "*"
flask-graphql = "*"
graphene-sqlalchemy = "*"
sqlalchemy = "*"

[requires]
python_version = "3.7"

[sylflo]

You need to upgrade to the beta #270 (comment)

[anshajk]

I was facing this issue but I managed to fix it by upgrading to 2.3.0

[github-actions]

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