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Improved dba:update function.

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This commit is contained in:
Michael 2017-04-29 07:50:09 +00:00
parent edbbdf9761
commit 0e4cd900d5
2 changed files with 71 additions and 11 deletions
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66
include/dba.php
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@ -756,15 +756,77 @@ class dba {
/**
* @brief Updates rows
*
* Updates rows in the database. When $old_fields is set to an array,
* the system will only do an update if the fields in that array changed.
*
* Attention:
* Only the values in $old_fields are compared.
* This is an intentional behaviour.
*
* Example:
* We include the timestamp field in $fields but not in $old_fields.
* Then the row will only get the new timestamp when the other fields had changed.
*
* When $old_fields is set to a boolean value the system will do this compare itself.
* When $old_fields is set to "true" the system will do an insert if the row doesn't exists.
*
* Attention:
* Only set $old_fields to a boolean value when you are sure that you will update a single row.
* When you set $old_fields to "true" then $fields must contain all relevant fields!
*
* @param string $table Table name
* @param array $fields contains the fields that are updated
* @param array $condition condition array with the key values
* @param array|boolean $old_fields array with the old field values that are about to be replaced
*
* @return boolean was the update successfull?
*/
static public function update($table, $fields, $condition) {
static public function update($table, $fields, $condition, $old_fields = array()) {
$sql = "UPDATE `".self::$dbo->escape($table)."` SET `".
/** @todo We may use MySQL specific functions here:
* INSERT INTO `config` (`cat`, `k`, `v`) VALUES ('%s', '%s', '%s') ON DUPLICATE KEY UPDATE `v` = '%s'"
* But I think that it doesn't make sense here.
*/
$table = self::$dbo->escape($table);
if (is_bool($old_fields)) {
$sql = "SELECT * FROM `".$table."` WHERE `".
implode("` = ? AND `", array_keys($condition))."` = ? LIMIT 1";
$params = array();
foreach ($condition AS $value) {
$params[] = $value;
}
$do_insert = $old_fields;
$old_fields = self::fetch_first($sql, $params);
if (is_bool($old_fields)) {
if ($do_insert) {
return self::insert($table, $fields);
}
$old_fields = array();
}
}
$do_update = (count($old_fields) == 0);
foreach ($old_fields AS $fieldname => $content) {
if (isset($fields[$fieldname])) {
if ($fields[$fieldname] == $content) {
unset($fields[$fieldname]);
} else {
$do_update = true;
}
}
}
if (!$do_update OR (count($fields) == 0)) {
return true;
}
$sql = "UPDATE `".$table."` SET `".
implode("` = ?, `", array_keys($fields))."` = ? WHERE `".
implode("` = ? AND `", array_keys($condition))."` = ?";

12
include/items.php
View file

@ -443,18 +443,16 @@ function store_conversation($arr) {
$conversation['source'] = $arr['source'];
}
$conv = dba::fetch_first("SELECT `protocol` FROM `conversation` WHERE `item-uri` = ?", $conversation['item-uri']);
if (dbm::is_result($conv)) {
if (($conv['protocol'] < $conversation['protocol']) AND ($conv['protocol'] != 0)) {
$old_conv = dba::fetch_first("SELECT `item-uri`, `reply-to-uri`, `conversation-uri`, `conversation-href`, `protocol`, `source`
FROM `conversation` WHERE `item-uri` = ?", $conversation['item-uri']);
if (dbm::is_result($old_conv)) {
if (($old_conv['protocol'] < $conversation['protocol']) AND ($old_conv['protocol'] != 0)) {
unset($conversation['protocol']);
unset($conversation['source']);
}
// Replace the conversation entry when the new one is better
//if ((($conv['protocol'] == 0) OR ($conv['protocol'] >= $conversation['protocol'])) AND ($conversation['protocol'] > 0)) {
if (!dba::update('conversation', $conversation, array('item-uri' => $conversation['item-uri']))) {
if (!dba::update('conversation', $conversation, array('item-uri' => $conversation['item-uri']), $old_conv)) {
logger('Conversation: update for '.$conversation['item-uri'].' from '.$conv['protocol'].' to '.$conversation['protocol'].' failed', LOGGER_DEBUG);
}
//}
} else {
if (!dba::insert('conversation', $conversation)) {
logger('Conversation: insert for '.$conversation['item-uri'].' (protocol '.$conversation['protocol'].') failed', LOGGER_DEBUG);