Unique index not working on Mongoose schema

Question

I have a schema setup like this:

var UserSchema = new Schema({
  id: {type: String, required: true, unique: true, index: true, default: mongoose.Types.ObjectId},

  name: { type: String, required: true },
  email: { type: String, required: true, unique: true, index: true },
  mobile: { type: String, unique: true, sparse: true },
  password: { type: String, required: true }

});

Seems to work great except the email field is letting in duplicates, despite have unique:true set. I do the following:

User.create({
  name: req.body.name,
  email: req.body.email,
  mobile: req.body.mobile,
  password: password
}, function(err, user) {
  if (err) return res.send({ invalid : true });
});

If req.body.email is a value that's already in the database, the query above should return err . But it doesn't, it creates the new user perfectly fine, resulting in duplicate emails in the database.

Why is this happening?

Answer 1

mongo and hence mongoose will assign an automatic id fields to your document. usually that is "_id". Try removing the "id" from your schema to fix your issue.