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Only fetch the rows when needed

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Michael 2017-05-01 05:45:36 +00:00
parent f1c53530a1
commit 0d7996d852
1 changed files with 25 additions and 11 deletions
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36
include/dba.php
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@ -812,23 +812,37 @@ class dba {
// Is there a relation entry for the table?
if (isset(self::$relation[$table])) {
foreach (self::$relation[$table] AS $field => $rel_def) {
// Fetch all rows that are to be deleted
$sql = "SELECT ".self::$dbo->escape($field)." FROM `".$table."` WHERE `".
implode("` = ? AND `", array_keys($param))."` = ?";
// Currently we only support relations with a single variable
if (count($rel_def) > 1) {
return false;
}
$retval = false;
$data = self::p($sql, $param);
while ($row = self::fetch($data)) {
foreach ($rel_def AS $rel_table => $rel_field) {
// We do a separate delete process per row
$rel_field = array_values($rel_def)[0];
$rel_table = array_keys($rel_def)[0];
// When the search field is the relation field, we don't need to fetch the rows
// This is useful when the leading record is already deleted in the frontend but the rest is done in the backend
if ((count($param) == 1) AND ($field == array_keys($param)[0])) {
$retval = self::delete($rel_table, array($rel_field => array_values($param)[0]), true, $callstack);
if (!$retval) {
return false;
}
} else {
// Fetch all rows that are to be deleted
$sql = "SELECT ".self::$dbo->escape($field)." FROM `".$table."` WHERE `".
implode("` = ? AND `", array_keys($param))."` = ?";
$retval = false;
$data = self::p($sql, $param);
while ($row = self::fetch($data)) {
// We have to do a separate delete process per row
$retval = self::delete($rel_table, array($rel_field => $row[$field]), true, $callstack);
if (!$retval) {
return false;
}
}
}
if (!$retval) {
return true;
if (!$retval) {
return true;
}
}
}
}