E0307 false positives when returning model fields

[sevdog]

When using pylint django if in model __str__ method a field is returned pylint cannot recognize that this field should be a string.

from django.db import models

class Model(models.Model):
    field = models.CharField(max_length=10)

    def __str__(self):  # E0307
        return self.field

It would be nice if this plugin was able to detect if a field which inherits from CharField or TextField is used and suppress this error.