/**
* Adds / updates a comment on an answer to the given question.
* @param string $databaseName
* @param string $questionId
* @param string $answerId
* @param CommentModel $comment
*/
public static function writeComment($databaseName, $questionId, $answerId, $comment)
{
$id = $comment->id->asString();
if (empty($id)) {
$id = $comment->id->id = QuestionModelMongoMapper::makeId();
}
$mapper = QuestionModelMongoMapper::connect($databaseName);
$mapper->write($comment, $id, MongoMapper::ID_IN_KEY, $questionId, "answers.{$answerId}.comments");
return $id;
}
