(PECL mongo >=0.9.0)
MongoCollection::update — Update records based on a given criteria
Description of the objects to update.
The object with which to update the matching records.
This parameter is an associative array of the form array("optionname" => <boolean>, ...). Currently supported options are:
"upsert"
If no document matches $criteria, a new document will be created from $criteria and $newobj (see upsert example below).
"multiple"
All documents matching $criteria will be updated. MongoCollection::update() has exactly the opposite behavior of MongoCollection::remove(): it updates one document by default, not all matching documents. It is recommended that you always specify whether you want to update multiple documents or a single document, as the database may change its default behavior at some point in the future.
"safe"
Check that the update succeeded.
Returns if the update was successfully sent to the database.
Throws MongoCursorException if the "safe" option is set and the update fails.
Versão | Descrição |
---|---|
1.0.1 | Changed "options" parameter from boolean to array. Pre-1.0.1, the second parameter was an optional boolean value specifying an upsert. |
1.0.5 | Added "safe" option. |
Exemplo #1 MongoCollection::update()
Adding an address field to a document.
<?php
$c->insert(array("firstname" => "Bob", "lastname" => "Jones" ));
$newdata = array('$set' => array("address" => "1 Smith Lane"));
$c->update(array("firstname" => "Bob"), $newdata);
var_dump($c->findOne(array("firstname" => "Bob")));
?>
O exemplo acima irá imprimir algo similar a:
array(4) { ["_id"]=> object(MongoId)#6 (0) { } ["firstname"]=> string(3) "Bob" ["lastname"]=> string(5) "Jones" ["address"]=> string(12) "1 Smith Lane" }
Exemplo #2 MongoCollection::update() upsert example
Upserts can simplify code, as a single line can create the object if it does not exist yet and update it if it does.
<?php
$c->drop();
$c->update(array("uri" => "/summer_pics"), array('$inc' => array("page hits" => 1)), array("upsert" => true));
var_dump($c->findOne());
?>
O exemplo acima irá imprimir algo similar a:
array(3) { ["_id"]=> object(MongoId)#9 (0) { } ["uri"]=> string(12) "/summer_pics" ["page hits"]=> int(1) }
Exemplo #3 MongoCollection::update() multiple example
By default, MongoCollection::update() will only update the first document matching $criteria that it finds. Using the "multiple" option can override this behavior, if needed.
This example adds a "gift" field to every person whose birthday is in the next day.
<?php
$today = array('$gt' => new MongoDate(), '$lt' => new MongoDate(strtotime("+1 day")));
$people->update("birthday" => $today), array('$set' => array('gift' => $surprise), array("multiple" => true));
?>
MongoDB core docs on » update.