WIP: trying to get category_create_tests to pass

The last error from running the tests was that the TErm table didnt
exist in the test database. So I'm running

    manage.py makemigrations

And it fails with

    AttributeError: 'NoneType' object has no attribute 'unique'

Following the [django docs](https://docs.djangoproject.com/en/1.8/topics/db/models/#abstract-related-name)
I put in:

        related_name="%(app_label)s_%(class)s_term"

But still can't even get a helpful error message.

django/website/data_layer/models.py

@@ -27,3 +27,7 @@ Item = Message
 
 class Taxonomy(taxonomies.models.Taxonomy):
     pass
+
+
+class Term(taxonomies.models.Term):
+    pass

django/website/rest_api/tests/category_create_tests.py

@@ -5,7 +5,7 @@ import pytest
 from django.core.urlresolvers import reverse
 from rest_framework.test import APIRequestFactory
 
-from data_layer.models import Taxonomy
+from data_layer.models import Taxonomy, Term
 from ..views import TaxonomyViewSet
 
 
@@ -24,3 +24,24 @@ def test_create_a_category():
     assert Taxonomy.objects.count() == 1
     [taxonomy] = Taxonomy.objects.all()
     assert taxonomy.name == 'Animal'
+
+# TODO: taxonomies have a slug
+
+# TODO: test_get_categories
+
+
+def add_term(taxonomy, term):
+    pass
+
+
+@pytest.mark.django_db
+def test_add_term_to_taxonomy():
+    create_category('Animal')
+
+    add_term('Animal', 'dog')
+    add_term('Animal', 'cat')
+
+    [animal] = Taxonomy.objects.all()
+    terms = Term.objects.all()
+    assert len(terms) == 2
+    assert all(term.taxonomy.name == 'Animal' for term in terms)

django/website/taxonomies/models.py

@@ -4,6 +4,9 @@ from django.utils.translation import ugettext_lazy as _
 
 class Taxonomy(models.Model):
 
+    class Meta:
+        abstract = True
+
     name = models.CharField(
         _('Name'),
         max_length=250,
@@ -34,8 +37,6 @@ class Taxonomy(models.Model):
     # To do Categories or limited vocabularies, you use 'optional' and 'admin',
     # to do free taggingn use 'multiple' and 'user'
 
-    class Meta:
-        abstract = True
 
 
 class Term(models.Model):
@@ -54,6 +55,7 @@ class Term(models.Model):
     taxonomy = models.ForeignKey(
         Taxonomy,
         verbose_name=_('Taxonomy'),
+        related_name="%(app_label)s_%(class)s_term"
     )
 
     long_name = models.TextField(