golang-忽略json属性而不被序列化的优雅方法 [英] golang - elegant way to omit a json property from being serialized

问题描述

我有一个用户结构，其中包含诸如密码之类的敏感字段:

I've got a user struct, which has sensitive fields like password:

type User struct {
    UID string `json:"uid"  binding:"required"`
    Password string `json:"password" binding:"required"`
    EmailAddress string `json:"email" binding:"required"`
}

现在，我希望能够使用此结构来注册用户并进行更新，删除和查看.我不希望将密码序列化以供查看.我当然可以做一个自定义编组员，但这是唯一的方法吗?我尝试使用 json:-" 选项，但是这也会在取消编组时将其忽略，这是我不希望的.有更好的方法吗?

Now I want to be able to use this struct to register a user and update, delete but also to view. What I don't want is for the password to be serialized for viewing. I can, of course, make a custom marshaller but is that the only way? I tried using the json:"-" option but that causes it to be ignored while unmarshalling as well, which I don't want. Is there a better way?

为了让大家放松，我当然不会以明文形式存储密码.它是密码的bcrypt哈希，但仍然如此.我不希望在搜索用户时将其返回.

To put some of you guys at ease, I'm NOT going to be storing the password in plaintext, of course. It's the bcrypt hash of the password, but still. I don't want it to be returned when I search for users.

推荐答案

我想说实现json.如果您要自定义封送处理，Marshaler是一个优雅的解决方案.在这种情况下很简单:

I'd say implementing json.Marshaler is the elegant solution if you want custom marshaling. It's quite simple in this case:

func (u User) MarshalJSON() ([]byte, error) {
    type user User // prevent recursion
    x := user(u)
    x.Password = ""
    return json.Marshal(x)
}

如果在编组时根本不需要密码字段，请在用户类型"中添加"omitempty".

Add "omitempty" in your User type if you don't want the password field at all when marshaling.

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