如何在mongoose updateMany()中将字符串添加到当前值
//节点js mongoose //例如,ids=['id1','id2']如何在mongoose updateMany()中将字符串添加到当前值,mongoose,Mongoose,//节点js mongoose //例如,ids=['id1','id2'] const usersUpdated = await User.updateMany( { _id: { $in: ids } }, [ { $set: { username: { $concat: ['$username', deletedFormate] } } } ], { multi: true, new: true }, function(error, result) { }
const usersUpdated = await User.updateMany(
{ _id: { $in: ids } },
[
{ $set: { username: { $concat: ['$username', deletedFormate] } } }
],
{ multi: true, new: true },
function(error, result) {
}
);
//我需要在所有匹配用户名后添加字符串
//例如,如果updateMany找到2个文档
//1. username=m2012我想用m2012添加55555,更新后将为//m201255555请按照下面的方法使用$concat
let query = {
_id: {
$in: ids
}
};
let changes = {
$set: {
username: {
"$concat": ["$username", deletedFormate]
}
}
};
let usersUpdated = await User.updateMany(query, [changes]).lean();
console.log(usersUpdated);
注:上述方法仅适用于mongodb 4.2版及以上版本答案发布。如果你喜欢我的努力,请批准并投票支持我的回答