为什么golang go-gin错误总是返回空对象

Question

我试图在 gin golang 中解析错误验证，但产生一个空对象“{}”

这是我的第一次尝试：

resp, err := userService.UserRegistrationService(c)

if err != nil {
    c.JSON(http.StatusBadRequest, gin.H{"error": err})
    return
}

返回：

{
    "error": [
        {},
        {}
    ]
}

这是我的第二次尝试：

resp, err := userService.UserRegistrationService(c)

if err != nil {
    dada := fmt.Errorf("%v", err)
    c.JSON(http.StatusBadRequest, dada)
    return
}

返回

{}

看看我是否调试了err参数：

resp, err := userService.UserRegistrationService(c)
    fmt.Println(err)
    if err != nil {
        dada := fmt.Errorf("%v", err)
        fmt.Println(dada)
        c.JSON(http.StatusBadRequest, dada)
        return
    }

它的回报：

2020/11/10 12:41:46 stdout: Key: 'User.Email' Error:Field validation for 'Email' failed on the 'required' tag
2020/11/10 12:41:46 stdout: Key: 'User.Password' Error:Field validation for 'Password' failed on the 'required' tag

你们能帮帮我吗，试图在任何地方搜索仍然没有运气，我想像这样返回：

{
    "MyRequestStruct.PropertyOne": {
        "FieldNamespace": "MyRequestStruct.PropertyOne",
        "NameNamespace": "PropertyOne",
        "Field": "PropertyOne",
        "Name": "PropertyOne",
        "Tag": "required",
        "ActualTag": "required",
        "Kind": 24,
        "Type": {},
        "Param": "",
        "Value": ""
    },
    "MyRequestStruct.PropertyTwo": {
        "FieldNamespace": "MyRequestStruct.PropertyTwo",
        "NameNamespace": "PropertyTwo",
        "Field": "PropertyTwo",
        "Name": "PropertyTwo",
        "Tag": "required",
        "ActualTag": "required",
        "Kind": 24,
        "Type": {},
        "Param": "",
        "Value": ""
    }
}

Answer 1

在发布为json 响应时，您应该尝试err.Error() 而不是err。

试试这个：

resp, err := userService.UserRegistrationService(c)

if err != nil {
    c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
    return
}