progress

app/Models/Forum/Thread.php

@@ -7,4 +7,9 @@ use Illuminate\Database\Eloquent\Model;
 class Thread extends Model
 {
     protected $table = 'forum_threads';
+
+    public function category()
+    {
+        return $this->hasOne(Category::class, 'id', 'category_id');
+    }
 }