如何在MongoDB中重命名用户名？
要重命名用户，您需要使用update()和$set设置新的用户名。以下是语法-
db.system.users.update({"user":"yourOldUserName"}, {$set:{"user":"yourNewUserName"}});首先，显示来自MongoDB数据库的所有用户-
> use admin; switched to db admin > db.getUsers();
这将产生以下输出-
[
{
"_id" : "admin.Chris",
"user" : "Chris",
"db" : "admin",
"roles" : [
{
"role" : "readWrite",
"db" : "test"
}
],
"mechanisms" : [
"SCRAM-SHA-1",
"SCRAM-SHA-256"
]
},
{
"_id" : "admin.John",
"user" : "John",
"db" : "admin",
"roles" : [
{
"role" : "userAdminAnyDatabase",
"db" : "admin"
}
],
"mechanisms" : [
"SCRAM-SHA-1",
"SCRAM-SHA-256"
]
},
{
"_id" : "admin.Robert",
"user" : "Robert",
"db" : "admin",
"roles" : [
{
"role" : "readWrite",
"db" : "sample"
}
],
"mechanisms" : [
"SCRAM-SHA-1",
"SCRAM-SHA-256"
]
}
]现在将用户名从“John”重命名为“Larry”-
> db.system.users.update({"user":"John"}, {$set:{"user":"Larry"}});
WriteResult({ "nMatched" : 1, "nUpserted" : 0, "nModified" : 1 })让我们验证是否已使用名称“Larry”创建用户或未使用getUser()-
> db.getUser('Larry');这将产生以下输出-
{
"_id" : "admin.John",
"user" : "Larry",
"db" : "admin",
"roles" : [
{
"role" : "userAdminAnyDatabase",
"db" : "admin"
}
],
"mechanisms" : [
"SCRAM-SHA-1",
"SCRAM-SHA-256"
]
}如果现在尝试获取旧的用户名，则将显示一个空值。让我们看到相同的-
> db.getUser('John');这将产生以下输出-
Null
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