学习mongo系列（三） update() save()

> db.user.update({"name":"user1"}),{$set:{"title":"admin"}})
2016-01-12T11:29:09.317+0800 E QUERY [thread1] SyntaxError: missing ; before
statement @(shell):1:57

> db.user.update({"name":"user1"},{$set:{"title":"admin"}})
WriteResult({ "nMatched" : 1, "nUpserted" : 0, "nModified" : 1 })
> db.user.find()
{ "_id" : ObjectId("56946fba3a18f4867aecbcd1"), "name" : "user1", "password" : "
123456", "title" : "admin" }
{ "_id" : ObjectId("5694714a3a18f4867aecbcd2"), "name" : "user2", "passsword" :
"123456" }
> db.user.update({"name":"user1"},{$set:{"name":"admin"}})
WriteResult({ "nMatched" : 1, "nUpserted" : 0, "nModified" : 1 })
> db.user.find()
{ "_id" : ObjectId("56946fba3a18f4867aecbcd1"), "name" : "admin", "password" : "
123456", "title" : "admin" }
{ "_id" : ObjectId("5694714a3a18f4867aecbcd2"), "name" : "user2", "passsword" :
"123456" }
>注意你的括号，结构，以及字段的名称

以上语句只会修改第一条发现的文档，如果你要修改多条相同的文档，则需要设置 multi 参数为 true。

>db.col.update({‘title‘:‘MongoDB 教程‘},{$set:{‘title‘:‘MongoDB‘}},{multi:true})

save()方法

> db.user.save({"_id":ObjectId("5694714a3a18f4867aecbcd2"),"name":"aaaaaaaaa","p
assword":"123456"})
WriteResult({ "nMatched" : 1, "nUpserted" : 0, "nModified" : 1 })
> db.user.find().pretty()
{
"_id" : ObjectId("56946fba3a18f4867aecbcd1"),
"name" : "admin",
"password" : "123456",
"title" : "admin"
}
{
"_id" : ObjectId("5694714a3a18f4867aecbcd2"),
"name" : "aaaaaaaaa",
"password" : "123456"
}
>

学习mongo系列（三） update() save()

原文：http://www.cnblogs.com/mxh1099/p/5123821.html