add depth parameters when loading course and student-state caches. This will…

add depth parameters when loading course and student-state caches. This will make fewer (but fatter) queries to the database

lms/djangoapps/courseware/grades.py

@@ -270,7 +270,7 @@ def progress_summary(student, request, course, student_module_cache):
     # would be simpler
     course_module = get_module(student, request,
                                 course.location, student_module_cache,
-                                course.id)
+                                course.id, depth=None)
     if not course_module:
         # This student must not have access to the course.
         return None

lms/djangoapps/courseware/views.py

@@ -570,7 +570,7 @@ def progress(request, course_id, student_id=None):
 
     Course staff are allowed to see the progress of students in their class.
     """
-    course = get_course_with_access(request.user, course_id, 'load')
+    course = get_course_with_access(request.user, course_id, 'load', depth=None)
     staff_access = has_access(request.user, course, 'staff')
 
     if student_id is None or student_id == request.user.id:
@@ -590,7 +590,7 @@ def progress(request, course_id, student_id=None):
     student = User.objects.prefetch_related("groups").get(id=student.id)
 
     student_module_cache = StudentModuleCache.cache_for_descriptor_descendents(
-        course_id, student, course)
+        course_id, student, course, depth=None)
 
     courseware_summary = grades.progress_summary(student, request, course,
                                                  student_module_cache)