CollectionFind::sort

Set the sorting criteria

Description

public mysql_xdevapi\CollectionFind mysql_xdevapi\CollectionFind::sort(string $sort_expr)

Sort the result set by the field selected in the sort_expr argument. The allowed orders are ASC (Ascending) or DESC (Descending). This operation is equivalent to the 'ORDER BY' SQL operation and it follows the same set of rules.

Parameters

sort_expr: One or more sorting expressions can be provided. The evaluation is from left to right, and each expression is separated by a comma.

Return Values

A CollectionFind object that can be used to execute the command, or to add additional operations.

Examples

Example #1 mysql_xdevapi\CollectionFind::sort example

<?php
$session = mysql_xdevapi\getSession("mysqlx://user:password@localhost");
$session->sql("DROP DATABASE IF EXISTS addressbook")->execute();
$session->sql("CREATE DATABASE addressbook")->execute();

$schema = $session->getSchema("addressbook");
$create = $schema->createCollection("people");
$create
  ->add('{"name": "Alfred", "age": 18, "job": "Butler"}')
  ->execute();
$create
  ->add('{"name": "Reginald", "age": 42, "job": "Butler"}')
  ->execute();

// ...

$collection = $schema->getCollection("people");

$result = $collection
  ->find()
  ->sort('job desc', 'age asc')
  ->execute();

var_dump($result->fetchAll());
?>

The above example will output something similar to:

array(2) {
  [0]=>
  array(4) {
    ["_id"]=>
    string(28) "00005b6b53610000000000000106"
    ["age"]=>
    int(18)
    ["job"]=>
    string(6) "Butler"
    ["name"]=>
    string(6) "Alfred"
  }
  [1]=>
  array(4) {
    ["_id"]=>
    string(28) "00005b6b53610000000000000107"
    ["age"]=>
    int(42)
    ["job"]=>
    string(6) "Butler"
    ["name"]=>
    string(8) "Reginald"
  }
}