MongoDB\BSON\Serializable::bsonSerialize

(mongodb >=1.0.0)

MongoDB\BSON\Serializable::bsonSerialize — Provides an array or document to serialize as BSON

Опис

abstract public function MongoDB\BSON\Serializable::bsonSerialize(): array|stdClass|MongoDB\BSON\Document|MongoDB\BSON\PackedArray

Called during serialization of the object to BSON. The method must return an array, stdClass, MongoDB\BSON\Document, or MongoDB\BSON\PackedArray.

Root documents (e.g. a MongoDB\BSON\Serializable passed to MongoDB\BSON\Document::fromPHP()) will always be serialized as a BSON document. For field values, associative arrays and stdClass instances will be serialized as a BSON document and sequential arrays (i.e. sequential, numeric indexes starting at 0) will be serialized as a BSON array.

Users are encouraged to include an _id property (e.g. a MongoDB\BSON\ObjectId initialized in the constructor) when returning data for a BSON root document. In the absence of an _id property, the extension or server will generate a MongoDB\BSON\ObjectId for insert or upsert operations, respectively.

Параметри

У цієї функції немає параметрів.

Значення, що повертаються

An array, stdClass, MongoDB\BSON\Document, or MongoDB\BSON\PackedArray to be serialized as a BSON array or document.

Журнал змін

Версія	Опис
PECL mongodb 2.0.0	Return types previously declared as tentative are now enforced.
PECL mongodb 1.17.0	The return type was changed from array\|object. Instead of object, the return type now specifies stdClass. Classes that implement this interface must be changed to no longer declare an object return type. As the return type is tentative, a deprecation warning is emitted on PHP 8.1 and newer. In addition to the changes above, the extension now also supports returning instances of MongoDB\BSON\Document and MongoDB\BSON\PackedArray. Please note that any MongoDB\BSON\PackedArray instances returned are silently converted to objects when stored as root documents. They are stored as arrays when used as an embedded field value.

Версія

Опис

PECL mongodb 2.0.0

Return types previously declared as tentative are now enforced.

PECL mongodb 1.17.0

The return type was changed from array|object. Instead of object, the return type now specifies stdClass. Classes that implement this interface must be changed to no longer declare an object return type. As the return type is tentative, a deprecation warning is emitted on PHP 8.1 and newer. In addition to the changes above, the extension now also supports returning instances of MongoDB\BSON\Document and MongoDB\BSON\PackedArray. Please note that any MongoDB\BSON\PackedArray instances returned are silently converted to objects when stored as root documents. They are stored as arrays when used as an embedded field value.

Приклади

Приклад #1 MongoDB\BSON\Serializable::bsonSerialize() returning an associative array for root document

<?php

class MyDocument implements MongoDB\BSON\Serializable
{
    private $id;

    function __construct()
    {
        $this->id = new MongoDB\BSON\ObjectId;
    }

    function bsonSerialize(): array
    {
        return ['_id' => $this->id, 'foo' => 'bar'];
    }
}

echo MongoDB\BSON\Document::fromPHP(new MyDocument)->toRelaxedExtendedJSON(), "\n";

?>

Поданий вище приклад виведе щось схоже на:

{ "_id" : { "$oid" : "56cccdcada14d8755a58c591" }, "foo" : "bar" }

Приклад #2 MongoDB\BSON\Serializable::bsonSerialize() returning a sequential array for root document

<?php

class MyArray implements MongoDB\BSON\Serializable
{
    function bsonSerialize(): array
    {
        return [1, 2, 3];
    }
}

echo MongoDB\BSON\Document::fromPHP(new MyArray)->toRelaxedExtendedJSON(), "\n";

?>

Поданий вище приклад виведе:

{ "0" : 1, "1" : 2, "2" : 3 }

Приклад #3 MongoDB\BSON\Serializable::bsonSerialize() returning an associative array for document field

<?php

class MyDocument implements MongoDB\BSON\Serializable
{
    function bsonSerialize(): array
    {
        return ['foo' => 'bar'];
    }
}

$value = ['document' => new MyDocument];

echo MongoDB\BSON\Document::fromPHP($value)->toRelaxedExtendedJSON(), "\n";

?>

Поданий вище приклад виведе:

{ "document" : { "foo" : "bar" } }

Приклад #4 MongoDB\BSON\Serializable::bsonSerialize() returning a sequential array for document field

<?php

class MyArray implements MongoDB\BSON\Serializable
{
    function bsonSerialize(): array
    {
        return [1, 2, 3];
    }
}

$value = ['array' => new MyArray];

echo MongoDB\BSON\Document::fromPHP($value)->toRelaxedExtendedJSON(), "\n";

?>

Поданий вище приклад виведе:

{ "array" : [ 1, 2, 3 ] }

Прогляньте також

MongoDB\BSON\Unserializable::bsonUnserialize() - Constructs the object from a BSON array or document
MongoDB\BSON\Persistable
Persisting Data

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User Contributed Notes 1 note

down

Anonymous ¶

10 years ago

This documentation seems to be obsolete because I tried the first example and it doesn't convert the objectId to a string.

This seems to be more current documentation but I can't figure out how to get bson to json

http://mongodb.github.io/mongo-php-library/api/source-class-MongoDB.Model.BSONDocument.html#48-57

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