fix: course list page performance

lms/hooks.py

@@ -198,7 +198,8 @@ jinja = {
         "lms.lms.utils.has_course_instructor_role",
         "lms.lms.utils.has_course_moderator_role",
         "lms.lms.utils.get_certificates",
-        "lms.lms.utils.format_number"
+        "lms.lms.utils.format_number",
+        "lms.lms.utils.get_lesson_count"
     ],
     "filters": []
 }

lms/lms/utils.py

@@ -508,4 +508,10 @@ def create_notification_log(doc, method):
     make_notification_logs(notification, users)
 
 
+def get_lesson_count(course):
+    lesson_count = 0
+    chapters = frappe.get_all("Chapter Reference", {"parent": course}, ["chapter"])
+    for chapter in chapters:
+        lesson_count += frappe.db.count("Lesson Reference", {"parent": chapter.chapter})
 
+    return lesson_count

lms/lms/widgets/CourseCard.html

@@ -16,12 +16,13 @@
 
     <div class="course-card-content">
         <div class="course-card-meta">
-        {% if get_lessons(course.name) | length %}
+            {% set lesson_count = get_lesson_count(course.name) %}
+            {% if lesson_count %}
             <div class="vertically-center">
                 <svg class="icon icon-md">
                     <use href="#icon-education"></use>
                 </svg>
-            {{ get_lessons(course.name) | length }}
+                {{ lesson_count }}
             </div>
             {% endif %}