36 lines
1.9 KiB
PHP
Executable File
36 lines
1.9 KiB
PHP
Executable File
<?php
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// <markus@noga.de>
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// get foreign keys in preparation for a drop-down selector
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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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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 = $foreigner['foreign_field'];
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// Count number of rows in the foreign table. Currently we do
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// not use a drop-down if more than 200 rows in the foreign table,
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// for speed reasons and because we need a better interface for this.
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//
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// We could also do the SELECT anyway, with a LIMIT, and ensure that
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// the current value of the field is one of the choices.
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$count_query = 'SELECT COUNT(*) AS total FROM ' . PMA_backquote($foreign_db) . '.' . PMA_backquote($foreign_table);
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$count_result = PMA_mysql_query($count_query) or PMA_mysqlDie('', $count_query, '', $err_url);
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$the_total = PMA_mysql_result($count_result, 0, 'total');
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mysql_free_result($count_result);
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if ($the_total < 200) {
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// foreign_display can be FALSE if no display field defined:
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$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($foreign_table)
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. ' ORDER BY ' . PMA_backquote($foreign_table) . '.' . PMA_backquote($foreign_display);
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$disp = PMA_mysql_query($dispsql);
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}
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} // end if $foreigners
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?>
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