Add custom fields to Related List

With a very small modification, you are able to show custom fields within Related Lists.
With this modification, you are able to enable “Summary View” checkbox for custom fields to show this field in related lists.

Open file data/CRMEntity.php

Search:

$query .= " LEFT  JOIN vtiger_groups       ON vtiger_groups.groupid = vtiger_crmentity.smownerid";

Insert After:

foreach($other->tab_name_index as $tablename => $table_index) {
	if(isset($other->related_tables[$tablename])) continue;
	if($tablename == 'vtiger_crmentity') continue;
	if($tablename == $other->table_name) continue;

	$query .= " LEFT  JOIN $tablename   ON (".$tablename.".".$table_index." = ".$other->table_name.".".$other->table_index.")";
}