Fix the bug where we return many programs if the number of courses the staff user is enrolled in are many

lms/djangoapps/program_enrollments/rest_api/v1/tests/test_views.py

@@ -1425,18 +1425,52 @@ class UserProgramReadOnlyAccessGetTests(EnrollmentsDataMixin, APITestCase):
         assert len(response.data) == 1
         mock_get_programs.assert_called_once_with(course=self.course_id)
 
-    def test_course_staff_of_multiple_courses(self):
-        other_course_key = CourseKey.from_string('course-v1:edX+ToyX+Other_Course')
+    @ddt.data(
+        (
+            ['garbage-program'],
+            ['garbage-life']
+        ),
+        (
+            ['garbage-program', 'garbage-life'],
+            ['garbage-program', 'garbage-life']
+        )
+    )
+    @ddt.unpack
+    def test_course_staff_of_multiple_courses(
+        self,
+        program_slugs_to_return_first,
+        program_slugs_to_return_second
+    ):
+        def find_program_by_marketing_slug(slug, program_list):
+            for program in program_list:
+                if program['marketing_slug'] == slug:
+                    return program
+            return None
 
+        other_course_key = CourseKey.from_string('course-v1:edX+ToyX+Other_Course')
+        CourseOverviewFactory(id=other_course_key)
+        CourseRunFactory.create(key=text_type(other_course_key))
         CourseEnrollmentFactory.create(course_id=other_course_key, user=self.course_staff)
         CourseStaffRole(other_course_key).add_users(self.course_staff)
-
         self.client.login(username=self.course_staff.username, password=self.password)
 
+        programs_to_return_first = [
+            find_program_by_marketing_slug(
+                p_slug,
+                self.mock_program_data
+            ) for p_slug in program_slugs_to_return_first
+        ]
+        programs_to_return_second = [
+            find_program_by_marketing_slug(
+                p_slug,
+                self.mock_program_data
+            ) for p_slug in program_slugs_to_return_second
+        ]
+
         with mock.patch(
             _VIEW_PATCH_FORMAT.format('get_programs'),
             autospec=True,
-            side_effect=[[self.mock_program_data[0]], [self.mock_program_data[2]]]
+            side_effect=[programs_to_return_first, programs_to_return_second]
         ) as mock_get_programs:
             response = self.client.get(reverse(self.view_name) + '?type=masters')
 

lms/djangoapps/program_enrollments/rest_api/v1/views.py

@@ -763,14 +763,14 @@ class UserProgramReadOnlyAccessView(DeveloperErrorViewMixin, PaginatedAPIView):
         This function would take a list of course runs the user is staff of, and then
         try to get the Masters program associated with each course_runs.
         """
-        program_list = []
+        program_dict = {}
         for course_key in self.get_course_keys_user_is_staff_for(user):
             course_run_programs = get_programs(course=course_key)
             for course_run_program in course_run_programs:
                 if course_run_program and course_run_program.get('type').lower() == program_type_filter:
-                    program_list.append(course_run_program)
+                    program_dict[course_run_program['uuid']] = course_run_program
 
-        return program_list
+        return program_dict.values()
 
 
 class ProgramCourseEnrollmentOverviewView(