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Auto Incrementing Sequence in mongodb using php mongo
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<?php | |
$m = new MongoClient(); | |
// select a database | |
$db = $m->seq; | |
// select a collection (analogous to a relational database's table) | |
$collection = $db->counters; | |
$user_collection = $db->user; | |
/******************Function to auto increment seq******************/ | |
function getNextSequence($name){ | |
global $collection; | |
$retval = $collection->findAndModify( | |
array('_id' => $name), | |
array('$inc' => array("seq" => 1)), | |
null, | |
array( | |
"new" => true, | |
) | |
); | |
return $retval['seq']; | |
} | |
/********************Example Usage**********************************/ | |
$db_array=array('_id' => getNextSequence("userid"), 'name' => 'debojit'); | |
$user_collection->insert($db_array); |
how to make it work if we are using mongodb driver
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try to add
"upsert" => true,
at line 22 - it will create needed rows in autoincrement collection if they are missing