ProgramSerializer should now return default image if there's no progr…

…am page (#1750)

courses/serializers.py

@@ -302,13 +302,12 @@ def get_req_tree(self, instance):
         return ProgramRequirementTreeSerializer(instance=req_root).data
 
     def get_page(self, instance):
-        return (
-            ProgramPageSerializer(
+        if ProgramPage.objects.filter(program=instance).exists():
+            return ProgramPageSerializer(
                 instance=ProgramPage.objects.filter(program=instance).get()
             ).data
-            if ProgramPage.objects.filter(program=instance).exists()
-            else None
-        )
+        else:
+            return {"feature_image_src": _get_thumbnail_url(None)}
 
     class Meta:
         model = models.Program

courses/serializers_test.py

@@ -616,3 +616,11 @@ def test_learner_record_serializer(mock_context, program_with_empty_requirements
     assert user_info_payload == serialized_data["user"]
     assert program_requirements_payload == serialized_data["program"]["requirements"]
     assert course_0_payload == serialized_data["program"]["courses"][0]
+
+
+def test_program_serializer_returns_default_image():
+    """If the program has no page, we should still get a featured_image_url."""
+
+    program = ProgramFactory.create(page=None)
+
+    assert "feature_image_src" in ProgramSerializer(program).data["page"]

courses/views/v1/__init__.py

@@ -31,8 +31,6 @@
     PartnerSchool,
     Program,
     ProgramEnrollment,
-    ProgramRequirement,
-    ProgramRequirementNodeType,
 )
 from courses.serializers import (
     CourseRunEnrollmentSerializer,