How to get custom forum message field CForumMessage::GetListEx?

Question

1C-Bitrix

Property created
Why doesn't the function return it?

• There are no corresponding keys in print_r
  
• have not yet filled out the forum messages
  

Returns a list of messages (including related data) ....

$res = CForumMessage::GetListEx(array("POST_DATE"=>"DESC"), array('@TOPIC_ID'=>$arTopicIds), false, false, ["ID", "UF_ADMIN_ANSWER"]);
while($arMessages = $res->Fetch())
{
     // ... смотрим дамп
}

Answer 1

As the analysis of the Bitrix code showed, contrary to the documentation (or the ambiguity of what was written), user fields are selected by the CForumMessage::GetList function, and not GetListEx

$res = CForumMessage::GetList(array("POST_DATE"=>"DESC"), array("@TOPIC_ID" => [540, 557], ), false, 0, [ "SELECT" => ["UF_ADMIN_ANSWER"]]);
  while($arMessages = $res->Fetch())
  {
    var_dump($arMessages);
  }