Gorm Get some specific fields of preload, not all

Your Question

I have a 2 tables: user and order, order belong an user.

User {
  ID uint
  Name string
  ...
}

Order {
  ID uint
  UserID uint
  User User
}

How can I get order with only user's name? I use following code to do this but it get all fields of user

DB.
  Model(&Order{}).
  Preload("User").
  First(&order, "id = ?", orderId).Error

The document you expected this should be explained

I can't find any doc to solve this problem.

Expected answer

a command to get order with some specific fields of preloads.

Comment From: bayaderpack

can someone give example if this is possible I want do the same?