Allow programs to be filtered by type

ECOM-5167

course_discovery/apps/api/filters.py

@@ -8,7 +8,7 @@ from dry_rest_permissions.generics import DRYPermissionFiltersBase
 from guardian.shortcuts import get_objects_for_user
 from rest_framework.exceptions import PermissionDenied, NotFound
 
-from course_discovery.apps.course_metadata.models import Course, CourseRun
+from course_discovery.apps.course_metadata.models import Course, CourseRun, Program
 
 User = get_user_model()
 
@@ -89,3 +89,11 @@ class CourseRunFilter(django_filters.FilterSet):
     class Meta:
         model = CourseRun
         fields = ['keys']
+
+
+class ProgramFilter(django_filters.FilterSet):
+    type = django_filters.CharFilter(name='type__name', lookup_expr='iexact')
+
+    class Meta:
+        model = Program
+        fields = ['type']

course_discovery/apps/api/v1/tests/test_views/test_programs.py

@@ -4,7 +4,7 @@ from rest_framework.test import APITestCase
 from course_discovery.apps.api.serializers import ProgramSerializer
 from course_discovery.apps.core.tests.factories import USER_PASSWORD, UserFactory
 from course_discovery.apps.course_metadata.models import Program
-from course_discovery.apps.course_metadata.tests.factories import ProgramFactory
+from course_discovery.apps.course_metadata.tests.factories import ProgramFactory, ProgramTypeFactory
 
 
 class ProgramViewSetTests(APITestCase):
@@ -41,3 +41,16 @@ class ProgramViewSetTests(APITestCase):
         response = self.client.get(url)
         self.assertEqual(response.status_code, 200)
         self.assertEqual(response.data['results'], ProgramSerializer(Program.objects.all(), many=True).data)
+
+    def test_filter_by_type(self):
+        """ Verify that the endpoint filters programs to those of a given type. """
+        url = reverse('api:v1:program-list') + '?type='
+
+        self.program.type = ProgramTypeFactory(name='Foo')
+        self.program.save()  # pylint: disable=no-member
+
+        response = self.client.get(url + 'foo')
+        self.assertEqual(response.data['results'][0], ProgramSerializer(Program.objects.get()).data)
+
+        response = self.client.get(url + 'bar')
+        self.assertEqual(response.data['results'], [])

course_discovery/apps/api/v1/views.py

@@ -333,6 +333,8 @@ class ProgramViewSet(viewsets.ReadOnlyModelViewSet):
     queryset = Program.objects.all()
     permission_classes = (IsAuthenticated,)
     serializer_class = serializers.ProgramSerializer
+    filter_backends = (DjangoFilterBackend,)
+    filter_class = filters.ProgramFilter
 
 
 class ManagementViewSet(viewsets.ViewSet):