66 lines
2.9 KiB
PHP
66 lines
2.9 KiB
PHP
<?php
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/* $Id$ */
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// vim: expandtab sw=4 ts=4 sts=4:
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/**
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* Gets foreign keys in preparation for a drop-down selector
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* Thanks to <markus@noga.de>
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*/
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// lem9: we always show the foreign field in the drop-down; if a display
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// field is defined, we show it besides the foreign field
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$foreign_link = false;
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if ($foreigners && isset($foreigners[$field])) {
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$foreigner = $foreigners[$field];
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$foreign_db = $foreigner['foreign_db'];
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$foreign_table = $foreigner['foreign_table'];
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$foreign_field = $foreigner['foreign_field'];
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// Count number of rows in the foreign table. Currently we do
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// not use a drop-down if more than 200 rows in the foreign table,
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// for speed reasons and because we need a better interface for this.
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//
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// We could also do the SELECT anyway, with a LIMIT, and ensure that
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// the current value of the field is one of the choices.
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$the_total = PMA_countRecords($foreign_db, $foreign_table, TRUE);
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if ((isset($override_total) && $override_total == true) || $the_total < $cfg['ForeignKeyMaxLimit']) {
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// foreign_display can be FALSE if no display field defined:
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$foreign_display = PMA_getDisplayField($foreign_db, $foreign_table);
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$dispsql = 'SELECT ' . PMA_backquote($foreign_field)
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. (($foreign_display == FALSE) ? '' : ', ' . PMA_backquote($foreign_display))
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. ' FROM ' . PMA_backquote($foreign_db) . '.' . PMA_backquote($foreign_table)
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. (empty($foreign_filter) ? '' : ' WHERE ' . PMA_backquote($foreign_field)
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. ' LIKE "%' . PMA_sqlAddslashes($foreign_filter, TRUE) . '%"'
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. (($foreign_display == FALSE) ? '' : ' OR ' . PMA_backquote($foreign_display)
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. ' LIKE "%' . PMA_sqlAddslashes($foreign_filter, TRUE) . '%"'
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)
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)
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. (($foreign_display == FALSE) ? '' :' ORDER BY ' . PMA_backquote($foreign_table) . '.' . PMA_backquote($foreign_display))
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. (isset($foreign_limit) ? $foreign_limit : '');
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$disp = PMA_DBI_query($dispsql);
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if ($disp) {
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// garvin: If a resultset has been created, pre-cache it in the $disp_row array
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// This helps us from not needing to use mysql_data_seek by accessing a pre-cached
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// PHP array. Usually those resultsets are not that big, so a performance hit should
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// not be expected.
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$disp_row = array();
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while ($single_disp_row = @PMA_DBI_fetch_assoc($disp)) {
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$disp_row[] = $single_disp_row;
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}
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$the_total = count($disp_row);
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@PMA_DBI_free_result($disp);
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}
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}
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else {
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unset($disp_row);
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$foreign_link = true;
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}
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} // end if $foreigners
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?>
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