Mongoosejs text index an object

currently im having a problem regarding referencing text index in object here's the code

Schema

var UserSchema = new mongoose.Schema({
    username: String,
    fullname: String,
    email: {
        type: String,
        lowercase: true,
        unique: true
    },
  supplier: Boolean,
  supplierdetails: {
    name: String,
    businesstype: String,
    location: String,
    products: String,
    revenue: String,
    employees: String,
    yearsestablished: String
  }
});
UserSchema.index({supplierdetails: 'text'});
module.exports = mongoose.model('User', UserSchema);

API

router.post('/findsupplier', function(req, res){
    User.find({supplier: true, $text: {$search: req.body.supplyData}}, {score: {$meta: 'textScore'}})
    .sort({score: {$meta: 'textScore'}})
    .exec(function(err, supplyResult){
        if(err)
            throw err;
        else
            res.json(supplyResult);
    });
});

As you can see here "supplierdetails" is an object on my schema, and i tell mongoosejs to text index it, because i want to do a text index search on the whole supplierdetails object which contains name, businesstype, products, location and etc.., i saw on my mongo shell the created index

But it's still not working This is my data on database

I searched "dog" or "shiba" but still returning me no results.

My other functionality which uses text index is perfectly working, the only difference is, the one that i've text index isn't an object, it's just a String property and it perfectly works

Am i doing it wrong?

via John