The MongoDB\Driver\Query class

(mongodb >=1.0.0)

Вступ

The MongoDB\Driver\Query class is a value object that represents a database query.

Короткий огляд класу

final class MongoDB\Driver\Query {

/* Методи */

final public __construct(array|object $filter, ?array $queryOptions = null)

}

Зміст

MongoDB\Driver\Query::__construct — Create a new Query

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User Contributed Notes 5 notes

down

maha88a ¶

8 years ago

Here is an example of Query to retrieve the records from MangoDB collection using a filter. It will return in this case just one record that satisfy the filter id = 2.

Considering the following MangoDB collection:

<?php
/* my_collection */

/* 1 */
{
    "_id" : ObjectId("5707f007639a94cbc600f282"),
    "id" : 1,
    "name" : "Name 1"
}

/* 2 */
{
    "_id" : ObjectId("5707f0a8639a94f4cd2c84b1"),
    "id" : 2,
    "name" : "Name 2"
}
?>

I'm using the following code:
<?php
$filter = ['id' => 2];
$options = [
   'projection' => ['_id' => 0],
];
$query = new MongoDB\Driver\Query($filter, $options);
$rows = $mongo->executeQuery('db_name.my_collection', $query); // $mongo contains the connection object to MongoDB
foreach($rows as $r){
   print_($r);
}
?>

down

yatiny3007 at gmail dot com ¶

7 years ago

Find By _id 

$mongo = new \MongoDB\Driver\Manager('mongodb://root:root@192.168.0.127/db');

$id           = new \MongoDB\BSON\ObjectId("588c78ce02ac660426003d87");
$filter      = ['_id' => $id];
$options = [];

$query = new \MongoDB\Driver\Query($filter, $options);
$rows   = $mongo->executeQuery('db.collectionName', $query); 

foreach ($rows as $document) {
  pr($document);
}

down

tiwaritusharudayan at gmail dot com ¶

6 years ago

This format displays the documents returned from the query as stdClass Objects. For display purposes, it's fine, but if certain computations need to be performed using the returned documents and their corresponding fields, use this:

------------------------------------Code Snippet-----------------------------------

$connection = new MongoDB\Driver\Manager("mongodb://localhost:27017");
    
$filter = ["name"=>"insert_desired_name_here"];
/* the following condition, and others similar to it, work as well

$filter = ["age"=>["$gt"=>"18"]]; /*/
    
$options = []; /* put desired options here, should you need any */
    
$query = new MongoDB\Driver\Query($filter,$options);
    
$documents = $connection->executeQuery('trial.trial' /*dbname.collection_name*/,$query);
    
foreach($documents as $document){
    $document = json_decode(json_encode($document),true);
    echo $document[name];
}

--------------------------------------------------------------------------------------

The first executable statement inside the foreach encodes the returned stdClass object to a json object, and the same is immediately decoded to an associative array, which can then be used as and when needed

down

dvdogrady at gmail dot com ¶

7 years ago

Hello

Im just writing this note to help people out who want to write $filter arrays with query operators in them.

I have copied this code off maha88a's note but I changed the $filter to give you an idea of how it would work with the query operators

Considering the following MangoDB collection:

<?php
/* my_collection */

/* 1 */
{
    "_id" : ObjectId("5707f007639a94cbc600f282"),
    "id" : 1,
    "name" : "Name 1"
}

/* 2 */
{
    "_id" : ObjectId("5707f0a8639a94f4cd2c84b1"),
    "id" : 2,
    "name" : "Name 2"
}
?>

I'm using the following code:
<?php
// This $filter will return any id's qualing to 2 but what if we want all the id's above 0.
// $filter = ['id' => 2];
// This is how we would do this.
$filter = ['id' => ['$gt' => 0]]
$options = [
   'projection' => ['_id' => 0],
];
$query = new MongoDB\Driver\Query($filter, $options);
$rows = $mongo->executeQuery('db_name.my_collection', $query); // $mongo contains the connection object to MongoDB
foreach($rows as $r){
   print_($r);
}
?>

down

jaimegarbanzo at gmail dot com ¶

3 years ago

# constructing a to a remote server and querry and limiting the result to the latest 3 results

$username ="yourusername";
$password = "yourpasswort";

$manager = new MongoDB\Driver\Manager("mongodb://yourserver.com/",
     array("username" => $username, "password" => $password )
    );    

# setting your options and filter
$filter  = [];
$options = ['sort'=>array('_id'=>-1),'limit'=>3]; # limit -1 from newest to oldest 

#constructing the querry
$query = new MongoDB\Driver\Query($filter, $options);

#executing 
$cursor = $manager->executeQuery('resultdb.test', $query);

echo "dumping results<br>";
foreach ($cursor as $document) {
    var_dump($document);
}

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