Make compatible with Django 2.0

.travis.yml

@@ -6,7 +6,13 @@ python:
   - "pypy"
 
 env:
-  - "$DJANGO='django<2'"
+  - deps='django<1.9 djangorestframework<3.7'
+  - deps='django<2'
+
+matrix:
+  include:
+    - python: "3.6"
+      env: deps='django<2.1'
 
 sudo: false
 
@@ -15,7 +21,7 @@ before_install:
 
 # command to install dependencies, e.g. pip install -r requirements.txt --use-mirrors
 install:
-  - pip install $DJANGO
+  - pip install $deps
   - pip install -r requirements-dev.txt
   - pip install coveralls==1.1  # travis pypy not compatible with later versions
   - pip freeze

test_project/generic/models.py

@@ -18,8 +18,10 @@ def __str__(self):
 @six.python_2_unicode_compatible
 class ModelB(models.Model):
     name = models.CharField(max_length=64)
-    a = models.ForeignKey(ModelA, blank=True, null=True, related_name='rel_b')
-    content_type = models.ForeignKey(ContentType, related_name='+')
+    a = models.ForeignKey(ModelA, blank=True, null=True, related_name='rel_b',
+                          on_delete=models.CASCADE)
+    content_type = models.ForeignKey(ContentType, related_name='+',
+                                     on_delete=models.CASCADE)
     object_id = models.PositiveIntegerField()
     content_object = GenericForeignKey('content_type', 'object_id')
 

test_project/many_to_one/models.py

@@ -19,7 +19,8 @@ def __str__(self):
 class Article(models.Model):
     headline = models.CharField(max_length=100)
     pub_date = models.DateField()
-    reporter = models.ForeignKey(Reporter, related_name='articles')
+    reporter = models.ForeignKey(Reporter, related_name='articles',
+                                 on_delete=models.CASCADE)
 
     def __str__(self):
         return self.headline

test_project/one_to_one/models.py

@@ -16,7 +16,8 @@ def __str__(self):
 
 @six.python_2_unicode_compatible
 class Restaurant(models.Model):
-    place = models.OneToOneField(Place, primary_key=True)
+    place = models.OneToOneField(Place, primary_key=True,
+                                 on_delete=models.CASCADE)
     serves_hot_dogs = models.BooleanField(default=False)
     serves_pizza = models.BooleanField(default=False)
 
@@ -26,7 +27,7 @@ def __str__(self):
 
 @six.python_2_unicode_compatible
 class Waiter(models.Model):
-    restaurant = models.ForeignKey(Restaurant)
+    restaurant = models.ForeignKey(Restaurant, on_delete=models.CASCADE)
     name = models.CharField(max_length=50)
 
     def __str__(self):

tox.ini

@@ -1,6 +1,7 @@
 [tox]
 envlist =
     {py27,py36,pypy}-django{18,11}
+    py36-django20
     # 1.9 breaks pypy3 hence only testing with 18
     # scandir fails to install in pypy3 so skippint for now
     # {pypy3}-django{18}
@@ -19,7 +20,9 @@ commands =
     make check
 deps =
     django18: django<1.9
+    django18: djangorestframework<3.7
     django11: django<2
+    django20: django<2.1
 whitelist_externals =
     make
 

url_filter/filtersets/django.py

@@ -122,8 +122,11 @@ def _build_filterset_from_related_field(self, field):
         Build a :class:`.FilterSet` for a Django relation model field
         such as ``ForeignKey``.
         """
+        # field.rel for Django < 1.9
+        remote_field = getattr(field, 'remote_field', None) or field.rel
+
         return self._build_django_filterset(field, {
-            'exclude': [field.rel.name],
+            'exclude': [remote_field.name],
         })
 
     def _build_filterset_from_reverse_field(self, field):