Saves a document to this collection

说明

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

If the object is from the database, update the existing database object, otherwise insert this object.

参数

a

Array or object to save. If an object is used, it may not have protected or private properties.

Note:
If the parameter does not have an _id key or property, a new MongoId instance will be created and assigned to it. See MongoCollection::insert() for additional information on this behavior.

options

Options for the save.

"w"
See WriteConcerns. The default value for MongoClient is 1.
"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.
"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.
"safe"
Deprecated. Please use the WriteConcern w option.

返回值

If w was set, returns an array containing the status of the save. Otherwise, returns a boolean representing if the array was not empty (an empty array will not be inserted).

错误/异常

Throws MongoException if the inserted document is empty or if it contains zero-length keys. Attempting to insert an object with protected and private properties will cause a zero-length key error.

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
1.2.0	Added "timeout" option.
1.0.11	Disconnects on "not master" errors if "safe" is set.
1.0.9	Added ability to pass integers to the "safe" option, which previously only accepted booleans. Added "fsync" option.
1.0.5	Added `options` parameter.

范例

Example #1 MongoCollection::save() example


<?php

$obj = array('x' => 1);

// insert $obj into the db
$collection->save($obj);
var_dump($obj);

// add another field
$obj['foo'] = 'bar';

// $obj cannot be inserted again, causes duplicate _id error
$collection->insert($obj);

// save updates $obj with the new field
$collection->save($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"
  }
}