PHPWales 2020 - June 3rd to June 4th

CollectionFind::fields

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CollectionFind::fieldsSet document field filter

Descrição

public mysql_xdevapi\CollectionFind::fields ( string $projection ) : mysql_xdevapi\CollectionFind

Defined the columns for the query to return. If not defined then all columns are used.

Parâmetros

projection

Can either be a single string or an array of string, those strings are identifying the columns that have to be returned for each document that match the search condition.

Valor Retornado

A CollectionFind object that can be used for further processing.

Exemplos

Exemplo #1 mysql_xdevapi\CollectionFind::fields() 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();

// ...

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

$result $collection
  
->find('job like :job and age > :age')
  ->
bind(['job' => 'Butler''age' => 16])
  ->
fields('name')
  ->
execute();

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

O exemplo acima irá imprimir algo similar à:

array(1) {
  [0]=>
  array(1) {
    ["name"]=>
    string(6) "Alfred"
  }
}
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