Handler for Field Parameters does not work about rest-layer HOT 4 CLOSED

var Users = schema.Schema{
	Description: "User Profile",
	Fields: schema.Fields{
		// default fields (a must-have on all domains)
		// "id":      schema.IDField,
		"created": schema.CreatedField,
		"updated": schema.UpdatedField,

		// fields
		"id": {
			Validator: &schema.String{
				MinLen: 2,
				MaxLen: 50,
			},
		},
		"name": {
			Required:   true,
			Filterable: true,
			Validator: &schema.String{
				MaxLen: 150,
			},
		},
		"email": {
			Required:   true,
			Filterable: true,
			Validator: &schema.String{
				Regexp: "^[a-zA-Z0-9.!#$%&’*+/=?^_`{|}~-]+@[a-zA-Z0-9-]+(?:.[a-zA-Z0-9-]+)*$",
			},
		},
		"company": {
			Required:   true,
			Filterable: true,
			Validator: &schema.String{
				MaxLen: 150,
			},
		},
		"image": {
			Required:   true,
			Filterable: true,
			Validator:  &schema.String{},
		},
		"password": schema.PasswordField,
		"reset_password": {
			Params: schema.Params{
				"old_password": {
					Description: "Old password",
					Validator:   &schema.String{},
				},
				"new_password": {
					Description: "New password",
					Validator:   &schema.String{},
				},
			},
			Handler: func(ctx context.Context, value interface{}, params map[string]interface{}) (interface{}, error) {
				// your transformation logic here
				logrus.Info("hmm...no output here?")
				logrus.Info(value)
				logrus.Error(params)
				return value, nil
			},
		},
	},
}

GET /users?access_token=eyJhbGciO...&fields=password_reset%3Areset_password%28old_password%3A%22oldpw%22%2Cnew_password%3A%22newpw%22%29 HTTP/1.1
Accept: */*
Accept-Encoding: gzip, deflate, compress
Host: localhost:8080
User-Agent: HTTPie/0.8.0



HTTP/1.1 200 OK
Content-Length: 64
Content-Type: application/json
Date: Sat, 24 Dec 2016 19:13:11 GMT
Request-Id: b1fchhthobshd71jqu0g
Vary: Origin
X-Total: 1

{
    "list": [
        {
            "_etag": "ef1h"
        }
    ], 
    "meta": {
        "page": 0, 
        "skip": 0, 
        "total": 1
    }
}