从结构转换/隐藏值

Question

I have an application that creates a user at the database and returns his information (with struct). and I want to send the user model to the client (response of the web server), without password (or more information that I don't want the client will get). what the right way to do that? make a "UIUser" struct with the only fields that I want to send the client and convert the original model to this struct? or user interface?

and of course, if you can give me an example to solve this problem.

Answer 1

Having view structs is probably a good idea in general, as you don't want to couple the API format to internal representation. Regardless, if you just wanna do this the lazy way and avoid serializing the password, you can always use the - json struct tag:

package main

import (
    "fmt"
    "encoding/json"
    "log"
)

type user struct {
    ID      int     `json:"id"`
    Name    string  `json:"name"`
    Pass    string  `json:"-"`
}

func main() {
    u := &user{123, "John", "supersecret"}
    b, err := json.Marshal(u)
    if err != nil {
        log.Fatal(err)
    }
    fmt.Println(string(b))
}

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