With pylint 1.5.0, astroid 1.4.1, pylint-django 0.7, 'get' is not recognised

[jribbens]

The following test script produces an error when linted and it seems to me that it should not:

"""Test case."""
from django.contrib.auth.models import User
User.objects.get(email="hello", password="there")

E: 3, 0: Instance of 'UserManager' has no 'get' member (no-member)

(This is with Python 3.4.3, Django 1.8.7.)

[nedbat]

I am seeing many more no-member violations with pylint==1.5.2, astroid==1.4.2, and pylint-django==0.7.1.

I've written them up as a pylint issue: pylint-dev/pylint#754, but perhaps the problem is in the pylint-django plugin?

[kaleb]

From the Django Deserialization of Natural Keys example, the following is also problematic:

from django.db import models

class PersonManager(models.Manager):
    # pylint: disable=too-few-public-methods
    # Does pylint not know about subclassing?

    def get_by_natural_key(self, first_name, last_name):
        # pylint: disable=no-member
        # pylint is complaining about no member `get1
        return self.get(first_name=first_name, last_name=last_name)

class Person(models.Model):
    objects = PersonManager()

    first_name = models.CharField(max_length=100)
    last_name = models.CharField(max_length=100)

    birthdate = models.DateField()

    class Meta:
        unique_together = (('first_name', 'last_name'),)

[mlncn]

pylint==1.5.4
django==1.7.10
pylint-django==0.7.1
astroid==1.4.4

Just started using pylint-django, updated pylint to be able to do so, it helped with a great many spurious warnings but as noted above, am now getting frequent nomember ones like these:

Instance of 'Reporter' has no 'save' member (no-member)
Super of 'ReporterCategory' has no 'save' member (no-member)
Instance of 'ReporterManager' has no 'get_queryset' member (no-member)
Instance of 'ReporterManager' has no 'filter' member (no-member)

Which is all to say subscribing, interested in helping.

[iXce]

As I faced this problem as well I tried to use different versions of pylint/astroid, and ended up using the git master version of both of them (pylint-dev/pylint@9e7bee0 and pylint-dev/astroid@7278409).

I then patched pylint-django (https://github.com/iXce/pylint-django) for:
a) compatibility with the new api for locals in pylint/astroid: 73326fa
b) considering ForeignObject as an alias of Member (for use with OneToOneFields): f4bcf7d
c) missing Model/Manager members: 0356359

I'm totally unsure if this was the best way to do it, but this combination of versions works very well for me at the moment =) Hope it can help someone ! And if these approaches are decent, I can do a pullrequest.

[jribbens]

@carlio Any chance of getting this issue fixed, given that this whole module is essentially broken currently?

[nedbat]

@iXce Please make a pull request. I'm not in a position to merge it (just a user, not committer), but it will help move this along.