Check if ID exists in a collection with mongoose

Question

For instance, I have a collection User:

var mongoose = require(\'mongoose\');

var UserSchema = new mongoose.Schema({
    email: String,
    googleI         


        

Answer 1

Use count rather than findOne.

This will (under the hood) cause mongoose to use find : http://docs.mongodb.org/manual/reference/method/db.collection.count

findOne() will read + return the document if it exists On the other hand, find() just returns a cursor (or not) and only reads the data if you iterate over the cursor. So in our case, we're not iterating over the cursor, merely counting the results returned.

User.count({_id: userID}, function (err, count){ 
    if(count>0){
        //document exists });
    }
});