MongoCollection::save

(PECL mongo >=0.9.0)

MongoCollection::save — 保存一个文档到集合

说明

public mixed MongoCollection::save ( array|object $document [, array $options = array() ] )

如果对象来自数据库，则更新现有的数据库对象，否则插入对象。

参数

document

要保存的 Array 或 Object。 如果用的是 Object，它不能有 protected 或 private 的属性。

Note:

如果参数不具有 _id 的键或者属性，将会创建并赋值一个新的 MongoId 实例。 关于此行为的更多信息，参见 MongoCollection::insert()。

options

此次保存的选项。

  • "fsync"

    Boolean, defaults to FALSE. Forces the insert to be synced to disk before returning success. If TRUE, an acknowledged insert is implied and will override setting w to 0.

  • "j"

    Boolean, defaults to FALSE. Forces the write operation to block until it is synced to the journal on disk. If TRUE, an acknowledged write is implied and this option will override setting "w" to 0.

    Note: If this option is used and journaling is disabled, MongoDB 2.6+ will raise an error and the write will fail; older server versions will simply ignore the option.

  • "socketTimeoutMS"

    This option specifies the time limit, in milliseconds, for socket communication. If the server does not respond within the timeout period, a MongoCursorTimeoutException will be thrown and there will be no way to determine if the server actually handled the write or not. A value of -1 may be specified to block indefinitely. The default value for MongoClient is 30000 (30 seconds).

  • "w"

    See WriteConcerns. The default value for MongoClient is 1.

  • "wtimeout"

    Deprecated alias for "wTimeoutMS".

  • "wTimeoutMS"

    This option specifies the time limit, in milliseconds, for write concern acknowledgement. It is only applicable when "w" is greater than 1, as the timeout pertains to replication. If the write concern is not satisfied within the time limit, a MongoCursorException will be thrown. A value of 0 may be specified to block indefinitely. The default value for MongoClient is 10000 (ten seconds).

  • "safe"

    Deprecated. Please use the WriteConcern w option.

  • "timeout"

    Integer, defaults to MongoCursor::$timeout. If "safe" is set, this sets how long (in milliseconds) for the client to wait for a database response. If the database does not respond within the timeout period, a MongoCursorTimeoutException will be thrown.

返回值

如果设置了 w，返回包含此次保存状态的一个 array。 否则，返回一个 boolean，表示数组是否为空（空数组不会被插入）。

错误／异常

如果插入的文档时空的，或者包含零长度的键，将抛出 MongoException。 尝试插入包含 protected 和 private 属性的对象将导致零长度键的错误。

Throws MongoCursorException if the "w" option is set and the write fails.

Throws MongoCursorTimeoutException if the "w" option is set to a value greater than one and the operation takes longer than MongoCursor::$timeout milliseconds to complete. This does not kill the operation on the server, it is a client-side timeout. The operation in MongoCollection::$wtimeout is milliseconds.

更新日志

版本 说明
1.5.0

增加 "wTimeoutMS" 选项来代替 "wtimeout"。 使用 "wtimeout" 时出现 E_DEPRECATED 错误。

新增 "socketTimeoutMS" 选项来代替 "timeout"。 使用 "timeout" 时出现 E_DEPRECATED 错误。

使用 "safe" 时出现 E_DEPRECATED 错误。

1.2.0 增加 "timeout" 选项。
1.0.11 设置 "safe" 时，当出现 "not master" 错误时主动断开连接。
1.0.9

增加 "fsync" 选项。

1.0.5 增加 options 参数。

范例

Example #1 MongoCollection::save() 例子

<?php

$obj = array('x' => 1);

// 插入 $obj 到 db
$collection->save($obj);
var_dump($obj);

// 增加额外的字段
$obj['foo'] = 'bar';

// $obj 不能被再次插入，导致 duplicate _id 错误
$collection->insert($obj);

// 保存、更新附带新字段的 $obj
$collection->save($obj);

?>

以上例程的输出类似于：

array(2) {
  ["x"]=>
  int(1)
  ["_id"]=>
  object(MongoId)#4 (1) {
    ["$id"]=>
    string(24) "50b6afe544415ed606000000"
  }
}

User Contributed Notes

cuisdy at gmail dot com 01-Dec-2012 02:36
Same as with method insert(), it is worth noting that creating a reference to $obj will have the same effect as $obj being a reference itself, i.e. no _id field will be added.

<?php

$a = &$obj;

$m = new MongoClient;
$collection = $m->test->phpmanual;

$obj = array('x' => 1);

// Suppose you create a reference for some reason
$a = &$obj;

$collection->save($obj);

var_dump($obj);
// prints: array(1) { ["x"]=> int(1) }
?>