Only include programs for which the course runs are not excluded

course_discovery/apps/api/serializers.py

@@ -75,6 +75,7 @@ PREFETCH_FIELDS = {
         'course__programs',
         'course__programs__partner',
         'course__programs__type',
+        'course__programs__excluded_course_runs',
         'language',
         'seats',
         'seats__currency',
@@ -350,7 +351,13 @@ class CourseRunSerializer(TimestampModelSerializer):
 
 class CourseRunWithProgramsSerializer(CourseRunSerializer):
     """A ``CourseRunSerializer`` which includes programs derived from parent course."""
-    programs = NestedProgramSerializer(many=True)
+    programs = serializers.SerializerMethodField()
+
+    def get_programs(self, obj):
+        programs = [program for program in obj.programs.all()
+                    if obj.id not in (run.id for run in program.excluded_course_runs.all())]
+
+        return NestedProgramSerializer(programs, many=True).data
 
     class Meta(CourseRunSerializer.Meta):
         model = CourseRun

course_discovery/apps/api/tests/test_serializers.py

@@ -190,6 +190,23 @@ class CourseRunWithProgramsSerializerTests(TestCase):
 
         self.assertDictEqual(serializer.data, expected)
 
+    def test_data_excluded_course_run(self):
+        """
+        If a course run is excluded on a program, that program should not be
+        returned for that course run on the course run endpoint.
+        """
+        request = make_request()
+        course_run = CourseRunFactory()
+        serializer_context = {'request': request}
+        serializer = CourseRunWithProgramsSerializer(course_run, context=serializer_context)
+        ProgramFactory(courses=[course_run.course], excluded_course_runs=[course_run])
+        expected = CourseRunSerializer(course_run, context=serializer_context).data
+        expected.update({
+            'programs': [],
+        })
+
+        self.assertDictEqual(serializer.data, expected)
+
 
 class FlattenedCourseRunWithCourseSerializerTests(TestCase):  # pragma: no cover
     def serialize_seats(self, course_run):