psycopg2-binary not adequate for `import psycopg2` when `poetry add --path`

• I am on the latest Poetry version.
• I have searched the issues of this repo and believe that this is not a duplicate.

• OS version and name: macOS 10.13.6
• Poetry version: 0.11.5

Issue

I am trying to use either peewee or SQLAlchemy for PostGRES.

When testing inside the package, installing only psycopg2-binary works fine. But when I need to use it in my another project, like

poetry add imserv --path ../imserv

It complains that I don’t have psycopg2 installed.

Now, I can installed psycopg2 to resolve the issue, but it comes with a warning.

UserWarning: The psycopg2 wheel package will be renamed from release 2.8; in order to keep installing from binary please use "pip install psycopg2-binary" instead. For details see: <http://initd.org/psycopg/docs/install.html#binary-install-from-pypi>.

“”")

[patarapolw]

I can install psycopg2, but it gives a warning on every first usage in a script. psycopg2-binary gives no warning.

[olly-writes-code]

So you can still have psycopg2 as a dependency and install from poetry but you need to make sure the build requirements are satisfied as stated in - http://initd.org/psycopg/docs/install.html#build-prerequisites

This should be closed as this is out of poetry’s control.