mongodb 数据库重命名

var source = "test";
var dest = "newtest";
var cols = db.getSiblingDB(source).getCollectionNames();
for(var i = 0;i        var from = source + '.' + cols[i];
        var to = dest + '.' + cols[i];
        db.adminCommand({renameCollection:from,to:to});
    
    
    }