fix: pinned is set to false for all posts in learner area

lms/djangoapps/discussion/rest_api/api.py

@@ -92,7 +92,7 @@ from .serializers import (
     UserStatsSerializer,
     get_context,
 )
-from .utils import discussion_open_for_user
+from .utils import discussion_open_for_user, set_threads_attribute_value
 
 User = get_user_model()
 
@@ -883,6 +883,7 @@ def get_learner_active_thread_list(request, course_key, query_params):
         profiled_user = comment_client.User(id=user_id, course_id=course_key)
 
     threads, page, num_pages = profiled_user.active_threads(query_params)
+    threads = set_threads_attribute_value(threads, "pinned", False)
     results = _serialize_discussion_entities(
         request, context, threads, {'profile_image'}, DiscussionEntity.thread
     )

lms/djangoapps/discussion/rest_api/utils.py

@@ -14,3 +14,17 @@ def discussion_open_for_user(course, user):
             user: User to check for privileges in course
     """
     return course.forum_posts_allowed or has_discussion_privileges(user, course.id)
+
+
+def set_threads_attribute_value(threads, attribute, value):
+    """
+    It iterates over thread list and assign thread attribute the value
+
+    Arguments:
+        threads: List containing threads
+        attribute: the key for thread dict
+        value: the value to assign to the thread attribute
+    """
+    for thread in threads:
+        thread[attribute] = value
+    return threads