Pylint can't find SQLAlchemy query member

Question

I have a Flask (v0.10.1) application using Flask-SQLAlchemy (v2.0) and I\'m trying to configure Pylint to check it. Running with Python 3.4.2.

First error was:

Answer 1

Here's a version of joeforker's answer that dynamically adds all public methods from the Session object back into a scoped_session's locals at lint-time, instead of hardcoding a few well-known method names.

Define {path}/{to}/pylintplugins.py:

import sys

from astroid import MANAGER, scoped_nodes
from astroid.builder import AstroidBuilder
from sqlalchemy.orm import Session


def register(_linter):
    pass

def transform(cls):
    if cls.name == 'scoped_session':
        builder = AstroidBuilder(MANAGER)
        module_node = builder.module_build(sys.modules[Session.__module__])
        session_cls_node = [
            c for c in module_node.get_children()
            if getattr(c, "type", None) == "class" and c.name == Session.__name__
        ][0]

        for prop in Session.public_methods:
            cls.locals[prop] = [
                c for c in session_cls_node.get_children() 
                if getattr(c, "type", None) == "method" and c.name == prop
            ]

MANAGER.register_transform(scoped_nodes.Class, transform)

And in your .pylintrc file:

load-plugins={path}.{to}.pylintplugins