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want sqlx work well when give a multi-level pointer to it to get or select a struct object #4

@alimy

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@alimy

sqlx work well if give a single-level non nil pointer of struct object when do get or select like below code:

func (s *userManageSrv) GetUserByID(id int64) (res *ms.User, err error) {
	res = &ms.User{}
	err = s.q.GetUserById.Get(res, id)
	return
}

but will throw a nil pointer error like below code:

func (s *userManageSrv) GetUserByID(id int64) (res *ms.User, err error) {
	err = s.q.GetUserById.Get(&res, id)
	return
}

I want the code above work well because gorm could do this work well.

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