Commands and Aggregation queries

command(command)

Execute command in MongoDB. A complete list of commands can be found in official documentation MongoDB.

Syntax:

function command(array $command = []): array

Arguments:

• command — array with a list of commands, required.

Return: array with the results of the command execution.

Example of use:

$result = $this->mongo_db->command([
    'serverStatus' => TRUE, 
    'rangeDeleter' => TRUE
]);

aggregate(collection, pipeline[, options])

Execute aggregation in MongoDB. A complete list of aggregation operators can be found in [official documentation] (https://docs.mongodb.com/manual/reference/operator/aggregation/) MongoDB.

Syntax:

function aggregate(string $collection = '', array $pipeline = [], array $options = []): array

NOTE: if you are using MongoDB version 3.6 or later, be sure to specify the cursors option in the $options.

Arguments:

• collection — collection name, required.
• pipeline — aggregation request, required.
• options — aggregation options. A complete list of aggregation operators can be found in official documentation (options) MongoDB.

Return: array with aggregation results.

Example of use:

$result = $this->mongo_db->aggregate(
    'stocks',
    [
        [
            '$project' => [
                'cusip' => 1, 
                'date'  => 1, 
                'price' => 1, 
                '_id'   => 0 
            ]
        ]
    ],
    [
        'allowDiskUse' => TRUE
    ]
);