MongoCollection::findAndModify

(PECL mongo >=1.3.0)

MongoCollection::findAndModify — Update a document and return it

Description

public array MongoCollection::findAndModify ( array $query [, array $update [, array $fields [, array $options ]]] )

The findAndModify command atomically modifies and returns a single document. By default, the returned document does not include the modifications made on the update. To return the document with the modifications made on the update, use the new option.

Parameters

query

The query criteria to search for.

update

The update criteria.

fields

Optionally only return these fields.

options

An array of options to apply, such as remove the match document from the DB and return it.

Option	Description
`sort` array	Determines which document the operation will modify if the query selects multiple documents. findAndModify will modify the first document in the sort order specified by this argument.
`remove` boolean	Optional if `update` field exists. When `TRUE`, removes the selected document. The default is `FALSE`.
`update` array	Optional if `remove` field exists. Performs an update of the selected document.
`new` boolean	Optional. When `TRUE`, returns the modified document rather than the original. The findAndModify method ignores the `new` option for remove operations. The default is `FALSE`.
`upsert` boolean	Optional. Used in conjunction with the `update` field. When `TRUE`, the findAndModify command creates a new document if the query returns no documents. The default is false. In MongoDB 2.2, the findAndModify command returns `NULL` when upsert is `TRUE`.

Return Values

Returns the original document, or the modified document when new is set.

Errors/Exceptions

Throws MongoResultException on failure.

Examples

Example #1 MongoCollection::findAndModify() example


<?php
$m = new Mongo;
$col = $m->selectDB("test")->jobs;

$col->insert(array(
     "name" => "Next promo",
     "inprogress" => false,
     "priority" => 0,
     "tasks" => array( "select product", "add inventory", "do placement"),
) );

$col->insert(array(
     "name" => "Biz report",
     "inprogress" => false,
     "priority" => 1,
     "tasks" => array( "run sales report", "email report" )
) );

$col->insert(array(
     "name" => "Biz report",
     "inprogress" => false,
     "priority" => 2,
     "tasks" => array( "run marketing report", "email report" )
    ),
    array("w" => 1)
);



$retval = $col->findAndModify(
     array("inprogress" => false, "name" => "Biz report"),
     array('$set' => array('inprogress' => true, "started" => new MongoDate())),
     null,
     array(
        "sort" => array("priority" => -1),
        "new" => true,
    )
);

var_dump($retval);
?>

The above example will output something similar to:

array(6) {
  ["_id"]=>
  object(MongoId)#7 (1) {
    ["$id"]=>
    string(24) "5091b5b244415e8cc3000002"
  }
  ["inprogress"]=>
  bool(true)
  ["name"]=>
  string(10) "Biz report"
  ["priority"]=>
  int(2)
  ["started"]=>
  object(MongoDate)#8 (2) {
    ["sec"]=>
    int(1351726514)
    ["usec"]=>
    int(925000)
  }
  ["tasks"]=>
  array(2) {
    [0]=>
    string(20) "run marketing report"
    [1]=>
    string(12) "email report"
  }
}

Example #2 MongoCollection::findAndModify() error handling


<?php
$m = new Mongo;
$col = $m->selectDB("test")->jobs;
try {
    $retval = $col->findAndModify(
         array("inprogress" => false, "name" => "Next promo"),
         array('$pop' => array("tasks" => -1)),
         array("tasks" => array('$pop' => array("stuff"))),
         array("new" => true)
    );
} catch(MongoResultException $e) {
    echo $e->getCode(), " : ", $e->getMessage(), "\n";
    var_dump($e->getDocument());
}

?>

The above example will output something similar to:

13097 : exception: Unsupported projection option: $pop
array(3) {
  ["errmsg"]=>
  string(46) "exception: Unsupported projection option: $pop"
  ["code"]=>
  int(13097)
  ["ok"]=>
  float(0)
}

User Contributed Notes

Barmy

2 years ago


There is an easy way to find and replace by _id : 

<?php
// ...

// Selecting unparsed lines
$cursor = $collection->find(array("mydata_isParsed" => array('$ne' => 1)));

// Doing our stuff
foreach($cursor as $document) {
    // should always be ok, just in case
    if (!isset($document["mydata_isParsed"])) {
        // ... do some stuff

        // flag as parsed and update line
        $document["mydata_isParsed"] = 1;
        $idField = '$id';
        $collection->findAndModify(array("_id" => new MongoId($document["_id"]->$idField)), $document);
    }
}