fix: discussion tab when there are no messages

- fixed the issue of not showing discussion tab when there are no messages
- fixed the error when the course page is visited by a guest user

community/www/courses/course.html

@@ -27,7 +27,7 @@
 				<a class="nav-link active" id="home-tab" data-toggle="tab" href="#home" role="tab" aria-controls="home"
 					aria-selected="true">Course Details</a>
 			</li>
-			{% if discussions %}
+			{% if current_batch %}
 			<li class="nav-item">
 				<a class="nav-link" id="discussions-tab" data-toggle="tab" href="#discussions" role="tab"
 					aria-controls="discussions" aria-selected="false">Discussions</a>

community/www/courses/course.py

@@ -10,11 +10,17 @@ def get_context(context):
     context.course = get_course(course_id)
     #context.course_enrolled = has_enrolled(course_id)
     context.discussions, context.memberships = get_discussions(course_id)
+    if context.memberships:
         context.member_type = context.memberships[0].member_type
         if context.member_type != "Student":
             context.batches = [membership.batch for membership in context.memberships]
         context.current_batch = context.memberships[0].batch
         context.author = context.memberships[0].member
+    else:
+        context.membership_type = None
+        context.batches = []
+        context.current_batch = None
+        context.author = None
 
 def get_course(slug):
     course = frappe.db.get_value('LMS Course', {"slug": slug},