International PHP Conference 2019 - Spring Edition

MongoDB\BSON\Serializable::bsonSerialize

(mongodb >=1.0.0)

MongoDB\BSON\Serializable::bsonSerializeProvides an array or document to serialize as BSON

说明

abstract public array|object MongoDB\BSON\Serializable::bsonSerialize ( void )

Called during serialization of the object to BSON. The method must return an array or stdClass.

Root documents (e.g. a MongoDB\BSON\Serializable passed to MongoDB\BSON\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 your constructor) when returning data for a BSON root document; otherwise, the driver or database will need to generate a MongoDB\BSON\ObjectId when inserting or upserting the document, respectively.

参数

此函数没有参数。

返回值

An array or stdClass to be serialized as a BSON array or document.

范例

Example #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()
    {
        return [
'_id' => $this->id'foo' => 'bar'];
    }
}

$bson MongoDB\BSON\fromPHP(new MyDocument);
echo 
MongoDB\BSON\toJSON($bson), "\n";

?>

以上例程的输出类似于:

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

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

<?php

class MyArray implements MongoDB\BSON\Serializable
{
    function 
bsonSerialize()
    {
        return [
123];
    }
}

$bson MongoDB\BSON\fromPHP(new MyArray);
echo 
MongoDB\BSON\toJSON($bson), "\n";

?>

以上例程会输出:

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

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

<?php

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

$value = ['document' => new MyDocument];
$bson MongoDB\BSON\fromPHP($value);
echo 
MongoDB\BSON\toJSON($bson), "\n";

?>

以上例程会输出:

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

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

<?php

class MyArray implements MongoDB\BSON\Serializable
{
    function 
bsonSerialize()
    {
        return [
123];
    }
}

$value = ['array' => new MyArray];
$bson MongoDB\BSON\fromPHP($value);
echo 
MongoDB\BSON\toJSON($bson), "\n";

?>

以上例程会输出:

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

参见

add a note add a note

User Contributed Notes 1 note

up
-1
Anonymous
2 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
To Top