Removed some django 2.0 warnings.

Author: azmeuk

autoslug/settings.py

@@ -58,7 +58,7 @@
 
 """
 from django.conf import settings
-from django.core.urlresolvers import get_callable
+from django.urls import get_callable
 
 # use custom slugifying function if any
 slugify_function_path = getattr(settings, 'AUTOSLUG_SLUGIFY_FUNCTION', 'autoslug.utils.slugify')

autoslug/tests/models.py

@@ -1,4 +1,4 @@
-from django.db.models import Model, CharField, DateField, BooleanField, ForeignKey, Manager
+from django.db.models import Model, CharField, DateField, BooleanField, ForeignKey, Manager, CASCADE
 
 
 # this app
@@ -18,7 +18,7 @@ class ModelWithUniqueSlug(Model):
 
 class ModelWithUniqueSlugFK(Model):
     name = CharField(max_length=200)
-    simple_model = ForeignKey(SimpleModel)
+    simple_model = ForeignKey(SimpleModel, on_delete=CASCADE)
     slug = AutoSlugField(populate_from='name', unique_with='simple_model__name')
 
 
@@ -138,7 +138,7 @@ class ModelWithSlugSpaceShared(SharedSlugSpace):
 
 class ModelWithUniqueSlugFKNull(Model):
     name = CharField(max_length=200)
-    simple_model = ForeignKey(SimpleModel, null=True, blank=True, default=None)
+    simple_model = ForeignKey(SimpleModel, null=True, blank=True, default=None, on_delete=CASCADE)
     slug = AutoSlugField(populate_from='name', unique_with='simple_model')
 
 
@@ -169,4 +169,4 @@ def delete(self, using=None):
 
 class NonDeletableModelWithUniqueSlug(AbstractModelWithCustomManager):
     name = CharField(max_length=200)
-    slug = AutoSlugField(populate_from='name', unique=True, manager_name='all_objects')
+    slug = AutoSlugField(populate_from='name', unique=True, manager_name='all_objects')