Add exception handling for model field checking

flake8_django/checkers/model_content_order.py

@@ -1,4 +1,5 @@
 import astroid
+from astroid.exceptions import InferenceError
 from functools import partial
 
 from .base_model_checker import BaseModelChecker
@@ -33,7 +34,7 @@ def is_field_declaration(node):
             ):
                 return True
         return False
-    except AttributeError:
+    except (AttributeError, InferenceError):
         return False
 
 

tests/fixtures/model_content_order.py

@@ -102,3 +102,27 @@ def my_method(self):
     @property
     def random_property(self):
         return '%s' % self
+
+
+class CustomManager(models.Manager):
+    def manager_only_method(self):
+        return
+
+
+class CustomQuerySet(models.QuerySet):
+    def manager_and_queryset_method(self):
+        return
+
+
+class ModelWithCustomManager(models.Model):
+    """
+    Model with custom manager which can't be inferred correctly.
+    """
+    first_name = models.CharField(max_length=32)
+    objects = CustomManager.from_queryset(CustomQuerySet)()
+    class Meta:
+        verbose_name = 'test'
+        verbose_name_plural = 'tests'
+
+    def __str__(self):
+        return 'Perfectly fine!'