Using sparse: true still getting MongoError: E11000 duplicate key error

Question

Schema (../models/add.js)

var addSchema = new Schema({
    name: {type: String, unique: true, sparse: true},
    phone: Number,
    email: String,
    countr         


        

Answer 1

You need to drop the old, non-sparse index in the shell so that Mongoose can recreate it with sparse: true the next time your app runs.

> db.contacts.dropIndex('name_1')