How to increase the id in the mongo?

Yes, following the example of the documentation ( create-an-auto- incrementing-field ) would look something like this:

1 - Enter in the counter collection the initial value for the field:

db.counters.insert(
   {
      _id: "userid",
      seq: 0
   }
)

2 - Create a getNextSequence function that accepts a string name. The function uses the findAndModify() method to atomically increment the value seq and return this new value:

function getNextSequence(name) {
   var ret = db.counters.findAndModify(
          {
            query: { _id: name },
            update: { $inc: { seq: 1 } },
            new: true
          }
   );
return ret.seq;
}

3 - Use this getNextSequence() function during insertion.

db.users.insert(
   {
     _id: getNextSequence("userid"),
     name: "Sarah C."
   }
)

db.users.insert(
   {
     _id: getNextSequence("userid"),
     name: "Bob D."
   }
)

For more information, see the documentation.

The MongoDB documentation itself has an example and shows you how to do it. Even they say that the method used is more recommended for _id, just what you need. Take a look at HERE .