Php 如何在mogodb中删除json元素？

以下是

mongodb

中的内容：

{
"_id": 74924,
"bangs": {
    "436": {
        "join_time": 1345624851,
        "status": 1,
        "scores": 0
    },
    "446": {
        "join_time": 1355727257,
        "status": 1,
        "scores": 0
    }
},
"_id": 74926,
"bangs": {
    "436": {
        "join_time": 1345624851,
        "status": 1,
        "scores": 0
    },
    "446": {
        "join_time": 1355727257,
        "status": 1,
        "scores": 0
    }
 }
}

$mongo->users->users->update(array('_id'=>74924), array('$pull'=>array('bangs'=>436)));

我想删除：

"436": {
        "join_time": 1345624851,
        "status": 1,
        "scores": 0
    },
 where _id=74924

结果将是：

{
"_id": 74924,
"bangs": {
    "446": {
        "join_time": 1355727257,
        "status": 1,
        "scores": 0
    }
},
"_id": 74926,
"bangs": {
    "436": {
        "join_time": 1345624851,
        "status": 1,
        "scores": 0
    },
    "446": {
        "join_time": 1355727257,
        "status": 1,
        "scores": 0
    }
 }
}

我这样写代码：

{
"_id": 74924,
"bangs": {
    "436": {
        "join_time": 1345624851,
        "status": 1,
        "scores": 0
    },
    "446": {
        "join_time": 1355727257,
        "status": 1,
        "scores": 0
    }
},
"_id": 74926,
"bangs": {
    "436": {
        "join_time": 1345624851,
        "status": 1,
        "scores": 0
    },
    "446": {
        "join_time": 1355727257,
        "status": 1,
        "scores": 0
    }
 }
}

$mongo->users->users->update(array('_id'=>74924), array('$pull'=>array('bangs'=>436)));

但是记录没有被删除

如何编写代码？

---

提前谢谢

您可以使用以下方法将其删除：

db.test.update( { _id:74924 }, { $unset: {"bangs.436":1} } )

// I think this can be written in php like this:
$mongo->users->users->update(array('_id'=>74924), array('$unset'=>array('bangs.436'=>1)));

---

您可以通过以下操作将其删除：

db.test.update( { _id:74924 }, { $unset: {"bangs.436":1} } )

// I think this can be written in php like this:
$mongo->users->users->update(array('_id'=>74924), array('$unset'=>array('bangs.436'=>1)));

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