PHPWales 2020 - June 3rd to June 4th

CollectionFind::sort

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CollectionFind::sortSet the sorting criteria

说明

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

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.

参数

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.

返回值

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

范例

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());
?>

以上例程的输出类似于:

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"
  }
}
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