Question

我有2个日期字段：date_start和date_end

$criteria = [
    '_id'=>$data->thread,
    'download_id'=>$data->id,
    'ip'=>new MongoInt32(Helper::aton($data->remote_addr)),
];

$status = $nodeThreadsCollection->update($criteria,
    [
        '$set'=>[
            'disconnected'=>(bool)$data->disconnected,
            'date_end'=>new MongoDate(),
        ],
        '$inc'=>[
            'bytes_send'=>new MongoInt64($data->bytes_send),
        ]
    ],[
        'upsert'=>true,
        'w'=>1, 
    ]
);

if(isset($status['updatedExisting']) && !$status['updatedExisting']) {
    $nodeThreadsCollection->update($criteria,
        [
            '$set'=>[
                'date_start'=>new MongoDate(),
            ],
        ],[
            'w'=>0,
        ]
    );
}

但它需要writeConcern = 1来获取插入状态并进行二次查询。如何在一个查询中创建它？

Answer 1

为了一次性完成这项工作，您可以：

<?php
/* Just random test setup */
$m = new MongoClient;
$nodeThreadsCollection = $m->test->test;

$data = new StdClass;
$data->thread = 5;
$data->id = 88;
$data->remote_addr = 76123123;
$data->disconnected = true;
$data->bytes_send = 7234;
*/

$criteria = [
    '_id'=>$data->thread,
    'download_id'=>$data->id,
    'ip'=>new MongoInt32($data->remote_addr),
];

$status = $nodeThreadsCollection->update($criteria,
    [
        '$set'=>[
            'disconnected'=>(bool)$data->disconnected,
            'date_end'=>new MongoDate(),
        ],
        '$setOnInsert'=>[
            'date_start'=>new MongoDate(),
        ],
        '$inc'=>[
            'bytes_send'=>new MongoInt64($data->bytes_send),
        ]
    ],[
        'upsert'=>true,
        'w'=>1,
    ]
);

如果“upsert”仍然只是“插入”，$setOnInsert运算符将只设置值。第一次（在新的集合上）运行此脚本显示：

{
    "_id" : NumberLong(5),
    "bytes_send" : NumberLong(7234),
    "date_end" : ISODate("2014-01-10T10:11:16.507Z"),
    "date_start" : ISODate("2014-01-10T10:11:16.507Z"),
    "disconnected" : true,
    "download_id" : NumberLong(88),
    "ip" : 76123123
}

第二次运行它：

{
    "_id" : NumberLong(5),
    "bytes_send" : NumberLong(14468),
    "date_end" : ISODate("2014-01-10T10:11:31.184Z"),
    "date_start" : ISODate("2014-01-10T10:11:16.507Z"),
    "disconnected" : true,
    "download_id" : NumberLong(88),
    "ip" : 76123123
}

另请参阅：http://docs.mongodb.org/manual/reference/operator/update/setOnInsert/

更新upsert：date_start字段

1 个答案: