PHP 5.6.0 released

MongoCursor::addOption

(PECL mongo >=1.0.4)

MongoCursor::addOptionAdds a top-level key/value pair to a query

Descrição

public MongoCursor MongoCursor::addOption ( string $key , mixed $value )

This is an advanced function and should not be used unless you know what you're doing.

A query can optionally be nested in a "query" field if other options, such as a sort or hint, are given. For instance, adding a sort causes the query to become a subfield of a bigger query object, like:

<?php

$query 
= array("query" => $query"orderby" => $sort);

?>

This method is for adding a top-level field to a query. It makes the query a subobject (if it isn't already) and adds the key/value pair of your chosing to the top level.

Aviso

It cannot be used to add extra criteria to a query on the fly. For instance, this will not work:

<?php

// NOT CORRECT
$cursor $users->find()->addOption("name""joe")->addOption("age"20);

?>
This does not query for a user named "joe" with an age of 20.

Parâmetros

key

Fieldname to add.

value

Value to add.

Valor Retornado

Returns this cursor.

Erros

Throws MongoCursorException if this cursor has started iterating.

Exemplos

Exemplo #1 MongoCursor::addOption() example

Using MongoCursor::skip() to skip over millions of results can become slow. One way around this is to use $min or $max options for the query. These can be handy, but they require an index on exactly the fields being searched for. This is an example of how to use $min as an alternative to MongoCursor::skip().

<?php

// make sure we have an index
$c->ensureIndex(array("ts" => 1));

// you may have to modify this to run in a reasonable amount of time on slow 
// machines (should take about 30 seconds on a good machine)
for ($i 0$i 30000000$i++) {
    
$c->insert(array("ts" => new MongoDate(), "i" => $i));
}

$now strtotime("now");

// find documents inserted in the last 2 seconds
$cursor $c->find()->addOption('$min', array("ts" => $now-2));

?>
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