I'm trying to perform a full-text search on an array of strings in Mongoose and I am getting this error:

{ [MongoError: text index required for $text query]

  name: 'MongoError',

  message: 'text index required for $text query',

  waitedMS: 0,

  ok: 0,

  errmsg: 'text index required for $text query',

  code: 27 }

However, I do have a text index declared on the field on the User Schema and I confirmed that the text index has been created because I am using mLab.
I am trying to perform a full-text search on fields

Here Is My User Schema:

var userSchema = mongoose.Schema({

        local: {

            firstName: String,

            lastName: String,

            username: String,

            password: String,

            fields: {type: [String], index: true}

        }

});

Here is My Code for the Full-Text Search:

User.find({$text: {$search: search}}, function (err, results) {

                if (err) {

                    console.log(err);

                } else {

                    console.log(results);

                }

        });