feature to show contact_id in list and editview; ability to sort by contact_id, ability to search for contact_id (or parts of it), so beware if you search for a contact by id, you may find more than one, since the number you search for may be part of the content of more than one field and contacts, as numbers can occur also in eg.: phonenumber, roomnumber, ZIP-Code, ...

addressbook/inc/class.addressbook_so.inc.php

@@ -128,7 +128,7 @@ class addressbook_so
 	 * In SQL we can search all columns, though a view make on real sense
 	 */
 	var $sql_cols_not_to_search = array(
-		'jpegphoto','owner','tid','private','id','cat_id','etag',
+		'jpegphoto','owner','tid','private','cat_id','etag',
 		'modified','modifier','creator','created','tz','account_id',
 		'uid',
 	);
@@ -615,6 +615,7 @@ class addressbook_so
 							unset($cols[$key]);
 						}
 					}
+					if ($col=='contact_id') $col='egw_addressbook.contact_id';
 				}
 
 				$backend->columns_to_search = $cols;

addressbook/inc/class.addressbook_ui.inc.php

@@ -972,6 +972,9 @@ class addressbook_ui extends addressbook_bo
 				case 'contact_created':
 					$order = "$query[order] IS NULL,$query[order] $sort,org_name $sort,n_family $sort,n_given $sort";
 					break;
+				case 'contact_id':
+					$order = "$query[order] $sort";
+					break;
 			}
 			if ($query['searchletter'])	// only show contacts if the order-criteria starts with the given letter
 			{

addressbook/templates/default/app.css

@@ -1,5 +1,6 @@
 .cursorHand { cursor: hand; }
 .countrySelect select { width: 150px; }
+.contactid:before { content:"#" }
 .emailCol div { width: 100%; overflow: hidden; }
 .redItalic { color: red; font-style: italic; }
 .fixedHeight,.telNumbers { height: 12px; }