下面常用的update操作,用mongodb2.6.3版本测试的,官方发布的稳定版本2.4,建议用稳定版。 一,upsert表示如果有数据就不插入,没数据就插入 1,命令行下 db.peoples.update( //查找name等于tank的用户... { name: "tank" },... {... "_id":1,... name: "An
下面常用的update操作,用mongodb2.6.3版本测试的,官方发布的稳定版本2.4,建议用稳定版。
一,upsert表示如果有数据就不插入,没数据就插入
1,命令行下
> db.peoples.update( //查找name等于tank的用户 ... { name: "tank" }, ... { ... "_id":1, ... name: "Andy", ... rating: 10, ... score: 10 ... }, ... { upsert: true } //如果没有就插入 ... ); WriteResult({ "nMatched" : 0, "nUpserted" : 1, "_id" : 1 }) > db.peoples.find(); { "_id" : 1, "name" : "Andy", "rating" : 10, "score" : 10 } > db.peoples.update( ... { _id: 1 }, ... { ... "_id":1, ... name: "Andy", ... rating: 10, ... score: 10 ... }, ... { upsert: true } ... ); WriteResult({ "nMatched" : 1, "nUpserted" : 0 }) //有匹配数据就不做插入操作 > db.peoples.find(); { "_id" : 1, "name" : "Andy", "rating" : 10, "score" : 10 }
2,php upsert操作
$collection->update( array("name" => "zhang"), array("_id"=>2,"name"=>"tank","rating"=>10,"score"=>10), array("upsert" => true) ); print_r($collection->findOne());
二,$set 替换值
1,命令行下操作
> db.peoples.find(); { "_id" : 1, "name" : "Andy", "rating" : 10, "score" : 10 } > db.peoples.update( ... { _id: 1 }, ... { ... $set: { rating: 18 } ... } ... ); WriteResult({ "nMatched" : 1, "nUpserted" : 0 }) > db.peoples.find(); { "_id" : 1, "name" : "Andy", "rating" : 18, "score" : 10 }
2,php $set操作
$where = array("_id"=>1); $param = array('$set'=>array("score"=>"100")); //注意此处的set必须为 单引号 $collection->update($where,$param); print_r($collection->findOne());
三,$inc如果没有对应对段就直接赋值,如果有在原来的值上加上该值
1,命令行下操作
> db.peoples.find(); { "_id" : 1, "name" : "Andy", "rating" : 28, "score" : 10 } > db.peoples.update( ... { _id: 1 }, ... { ... $inc: { age: 30 } ... } ... ); WriteResult({ "nMatched" : 1, "nUpserted" : 0 }) > db.peoples.find(); { "_id" : 1, "age" : 30, "name" : "Andy", "rating" : 28, "score" : 10 } //第一次,加了一个字段 > db.peoples.update( ... { _id: 1 }, ... { ... $inc: { age: 30 } ... } ... ); WriteResult({ "nMatched" : 1, "nUpserted" : 0 }) > db.peoples.find(); { "_id" : 1, "age" : 60, "name" : "Andy", "rating" : 28, "score" : 10 } //第二次,发现有这个字段就把值加上去了
2,php $inc操作
$where = array("_id"=>1); $param = array('$inc'=>array("age"=>30)); $collection->update($where,$param); print_r($collection->findOne());
四,$unset删除字段
1,命令行下操作
> db.peoples.find(); { "_id" : 1, "age" : 120, "name" : "Andy", "rating" : 28, "score" : 10 } > db.peoples.update( ... { _id: 1 }, ... { ... $unset: { age: ""} //删除age字段 ... } ... ); WriteResult({ "nMatched" : 1, "nUpserted" : 0 }) > db.peoples.find(); { "_id" : 1, "name" : "Andy", "rating" : 28, "score" : 10 } >
2,php $unset操作
$where = array("_id"=>1); $param = array('$unset'=>array("score"=>"")); $collection->update($where,$param); print_r($collection->findOne());
五,$rename修改字段名称
1,命令行下操作
> db.peoples.find(); { "_id" : 1, "name" : "Andy", "rating" : 28 } > db.peoples.update( ... { _id: 1 }, ... { $rename: { "name": "firstname" } } //将name改成firstname ... ); WriteResult({ "nMatched" : 1, "nUpserted" : 0 }) > db.peoples.find(); { "_id" : 1, "firstname" : "Andy", "rating" : 28 }
2,php $rename 操作
$where = array("_id"=>1); $param = array('$rename'=>array("firstname"=>"name")); //将firstname改成name $collection->update($where,$param); print_r($collection->findOne());
六,multi更新多条数据
1,命令行下操作
> db.peoples.find(); { "_id" : 1, "name" : "Andy", "rating" : 28 } { "_id" : 2, "name" : "zhang", "rating" : 3, "score" : 5 } { "_id" : 3, "name" : "hao", "rating" : 30, "score" : 5 } > db.peoples.update( ... { rating: { $gt: 15 } }, ... { $inc: { score: 10 } }, ... { multi: true } ... ); WriteResult({ "nMatched" : 2, "nUpserted" : 0 }) > db.peoples.find(); { "_id" : 1, "name" : "Andy", "rating" : 28, "score" : 10 } //这条数据更新了 { "_id" : 2, "name" : "zhang", "rating" : 3, "score" : 5 } { "_id" : 3, "name" : "hao", "rating" : 30, "score" : 15 } //这条数据更新了
2,php multi操作
$where = array("rating"=>array('$gt'=>10)); $param = array('$set'=>array("name"=>"tank1","rating"=>50)); $ismore = array("multiple" => true); $collection->update($where,$param,$ismore);
版本不一样,功能多少会不一样,例如,我用的版本是2.6.3,$min和$max就用不了,会报"errmsg" : "Invalid modifier specified $min",希望mongodb出一个稳定高版本。
原文地址:mongodb update 字符 操作, 感谢原作者分享。

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