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- <?php
- /* $Id: get_foreign.lib.php,v 2.2 2003/11/26 22:52:23 rabus Exp $ */
- // vim: expandtab sw=4 ts=4 sts=4:
-
-
- /**
- * Gets foreign keys in preparation for a drop-down selector
- * Thanks to <markus@noga.de>
- */
-
-
- // lem9: we always show the foreign field in the drop-down; if a display
- // field is defined, we show it besides the foreign field
- $foreign_link = false;
- if ($foreigners && isset($foreigners[$field])) {
- $foreigner = $foreigners[$field];
- $foreign_db = $foreigner['foreign_db'];
- $foreign_table = $foreigner['foreign_table'];
- $foreign_field = $foreigner['foreign_field'];
-
- // Count number of rows in the foreign table. Currently we do
- // not use a drop-down if more than 200 rows in the foreign table,
- // for speed reasons and because we need a better interface for this.
- //
- // We could also do the SELECT anyway, with a LIMIT, and ensure that
- // the current value of the field is one of the choices.
-
- $the_total = PMA_countRecords($foreign_db, $foreign_table, TRUE);
-
- if ((isset($override_total) && $override_total == true) || $the_total < 200) {
- // foreign_display can be FALSE if no display field defined:
-
- $foreign_display = PMA_getDisplayField($foreign_db, $foreign_table);
- $dispsql = 'SELECT ' . PMA_backquote($foreign_field)
- . (($foreign_display == FALSE) ? '' : ', ' . PMA_backquote($foreign_display))
- . ' FROM ' . PMA_backquote($foreign_db) . '.' . PMA_backquote($foreign_table)
- . (($foreign_display == FALSE) ? '' :' ORDER BY ' . PMA_backquote($foreign_table) . '.' . PMA_backquote($foreign_display))
- . (isset($foreign_limit) ? $foreign_limit : '');
- $disp = PMA_mysql_query($dispsql);
- }
- else {
- unset($disp);
- $foreign_link = true;
- }
- } // end if $foreigners
-
- ?>
-