update controllers logic

app/Models/ExamDraft.php

@@ -13,16 +13,26 @@ class ExamDraft extends BaseModel
 
     protected $fillable = [
         'teacher_id',
+        'author_id',
         'class_section_id',
         'semester',
         'school_year',
         'exam_type',
         'draft_title',
+        'author_comment',
         'description',
         'teacher_file',
         'teacher_filename',
+        'author_file',
+        'author_filename',
         'status',
+        'acceptance_type',
+        'review_revision',
+        'reviewer_id',
         'admin_id',
+        'is_legacy',
+        'reviewer_comment',
+        'reviewer_comments',
         'admin_comments',
         'reviewed_at',
         'final_file',
@@ -30,9 +40,6 @@ class ExamDraft extends BaseModel
         'final_pdf_file',
         'version',
         'previous_draft_id',
-        'is_legacy',
-        'created_at',
-        'updated_at',
     ];
 
     protected $casts = [