MongoCollection
PHP Manual

MongoCollection::findOne

(PECL mongo >=0.9.0)

MongoCollection::findOneQueries this collection, returning a single element

Descrição

public array MongoCollection::findOne ([ array $query = array() [, array $fields = array() ]] )

As opposed to MongoCollection::find(), this method will return only the first result from the result set, and not a MongoCursor that can be iterated over.

Parâmetros

query

The fields for which to search. MongoDB's query language is quite extensive. The PHP driver will in almost all cases pass the query straight through to the server, so reading the MongoDB core docs on » find is a good idea.

Aviso

Please make sure that for all special query operaters (starting with $) you use single quotes so that PHP doesn't try to replace "$exists" with the value of the variable $exists.

fields

Fields of the results to return. The array is in the format array('fieldname' => true, 'fieldname2' => true). The _id field is always returned.

Valor Retornado

Returns record matching the search or NULL.

Erros

Throws MongoConnectionException if it cannot reach the database.

Exemplos

Exemplo #1 MongoCollection::findOne() document by its id.

This example demonstrates how to find a single document in a collection by its id.

<?php

$articles 
$mongo->my_db->articles;

$article $articles->findOne(array('_id' => new MongoId('47cc67093475061e3d9536d2')));

?>

Exemplo #2 MongoCollection::findOne() document by some condition.

This example demonstrates how to find a single document in a collection by some condition and limiting the returned fields.

<?php

$users 
$mongo->my_db->users;
$user $users->findOne(array('username' => 'jwage'), array('password'));
print_r($user);

?>

O exemplo acima irá imprimir algo similar à:

Array
(
    [_id] => MongoId Object
        (
        )

    [password] => test
)

Notice how even though the document does have a username field, we limited the results to only contain the password field.

Veja Também


MongoCollection
PHP Manual