Mongodb 如何更新mongo db中具有给定值的指定字段
在这里,我想更新一个给定的文档,如下所示Mongodb 如何更新mongo db中具有给定值的指定字段,mongodb,mongodb-query,insert-update,Mongodb,Mongodb Query,Insert Update,在这里,我想更新一个给定的文档,如下所示 { "emailid": "xxx.gmail", "user_devices": [], "devices": [{ "created_time": 1607153351, "token": 123 }, { "cre
{
"emailid": "xxx.gmail",
"user_devices": [],
"devices": [{
"created_time": 1607153351,
"token": 123
},
{
"created_time": 1807153371,
"token": 1345
}]
}
在这里,我需要用一个新字段(如“Newfield”)更新带有1345标记的field devices:“Newfield”,其中最终输出如下所示
{
"emailid": "xxx.gmail",
"user_devices": [],
"devices": [{
"created_time": 1607153351,
"token": 123
},
{
"created_time": 1807153371,
"token": 1345,
"Newfield":"newfield"
}]
}
如何像这样更新mongo db。提前感谢您的回答
db.products.update({
"devices.token": 1345 //Matching condition
},
{
$set: {
"devices.$.t": 2 //Updates the matched element in the array
}
})
您可以使用位置运算符-