英文:
Struct field tag `name` not compatible with reflect.StructTag.Get: bad syntax for struct tag pair
问题
我阅读了这个，但它与我的情况不同，我有以下代码：
package mainimport ("bytes""fmt""reflect""strconv""strings")type User struct {Name string `name`Age int64 `age`}func main() {var u User = User{"bob", 10}res, err := JSONEncode(u)if err != nil {panic(err)}fmt.Println(string(res))}func JSONEncode(v interface{}) ([]byte, error) {refObjVal := reflect.ValueOf(v)refObjTyp := reflect.TypeOf(v)buf := bytes.Buffer{}if refObjVal.Kind() != reflect.Struct {return buf.Bytes(), fmt.Errorf("不支持类型为%s的值",refObjVal.Kind(),)}buf.WriteString("{")pairs := []string{}for i := 0; i < refObjVal.NumField(); i++ {structFieldRefObj := refObjVal.Field(i)structFieldRefObjTyp := refObjTyp.Field(i)switch structFieldRefObj.Kind() {case reflect.String:strVal := structFieldRefObj.Interface().(string)pairs = append(pairs, `"`+string(structFieldRefObjTyp.Tag)+`":"`+strVal+`"`)case reflect.Int64:intVal := structFieldRefObj.Interface().(int64)pairs = append(pairs, `"`+string(structFieldRefObjTyp.Tag)+`":`+strconv.FormatInt(intVal, 10))default:return buf.Bytes(), fmt.Errorf("不支持名称为%s和类型为%s的结构字段",structFieldRefObjTyp.Name,structFieldRefObj.Kind(),)}}buf.WriteString(strings.Join(pairs, ","))buf.WriteString("}")return buf.Bytes(), nil}
它完美地工作，并输出为：
{"name":"bob","age":10}
但在使用VS Code时，它给我以下问题：
可能是什么问题？
英文:
I read this, but it is different than my case, I've the below code:
package mainimport ("bytes""fmt""reflect""strconv""strings")type User struct {Name string `name`Age int64 `age`}func main() {var u User = User{"bob", 10}res, err := JSONEncode(u)if err != nil {panic(err)}fmt.Println(string(res))}func JSONEncode(v interface{}) ([]byte, error) {refObjVal := reflect.ValueOf(v)refObjTyp := reflect.TypeOf(v)buf := bytes.Buffer{}if refObjVal.Kind() != reflect.Struct {return buf.Bytes(), fmt.Errorf("val of kind %s is not supported",refObjVal.Kind(),)}buf.WriteString("{")pairs := []string{}for i := 0; i < refObjVal.NumField(); i++ {structFieldRefObj := refObjVal.Field(i)structFieldRefObjTyp := refObjTyp.Field(i)switch structFieldRefObj.Kind() {case reflect.String:strVal := structFieldRefObj.Interface().(string)pairs = append(pairs, `"`+string(structFieldRefObjTyp.Tag)+`":"`+strVal+`"`)case reflect.Int64:intVal := structFieldRefObj.Interface().(int64)pairs = append(pairs, `"`+string(structFieldRefObjTyp.Tag)+`":`+strconv.FormatInt(intVal, 10))default:return buf.Bytes(), fmt.Errorf("struct field with name %s and kind %s is not supprted",structFieldRefObjTyp.Name,structFieldRefObj.Kind(),)}}buf.WriteString(strings.Join(pairs, ","))buf.WriteString("}")return buf.Bytes(), nil}
It works perfectly, and give output as:
{"name":"bob","age":10}
But as VS code, it gives me the below problems:
What could be the issue?
答案1
得分: 7
请注意，这只是一个警告，告诉你没有遵循惯例。代码，正如你已经知道的那样，可以编译、运行，并输出你想要的结果：https://go.dev/play/p/gxcv8qPVZ6z。
为了避免这个警告，你可以禁用你的代码检查工具，或者更好的做法是按照惯例使用key:"value"在结构体标签中，然后使用Get方法提取值：https://go.dev/play/p/u0VTGL48TjO。
https://pkg.go.dev/reflect@go1.18.3#StructTag
结构体标签（StructTag）是结构体字段中的标签字符串。
按照惯例，标签字符串是可选地用空格分隔的
key:"value"对的串联。 每个键是一个非空字符串，由非控制字符组成，除了空格（U+0020 ' '）、引号（U+0022 '"'）和冒号（U+003A ':'）。每个值都使用U+0022 '"'字符和Go字符串字面值语法进行引用。
英文:
Note that that's just a warning telling you that you're not following convention. The code, as you already know, compiles and runs and outputs the result you want: https://go.dev/play/p/gxcv8qPVZ6z.
To avoid the warning, disable your linter, or, better yet, follow the convention by using key:"value" in the struct tags and then extract the value by using the Get method: https://go.dev/play/p/u0VTGL48TjO.
https://pkg.go.dev/reflect@go1.18.3#StructTag
> A StructTag is the tag string in a struct field.
>
> By convention, tag strings are a concatenation of optionally
> space-separated key:"value" pairs. Each key is a non-empty string
> consisting of non-control characters other than space (U+0020 ' '),
> quote (U+0022 '"'), and colon (U+003A ':'). Each value is quoted using
> U+0022 '"' characters and Go string literal syntax.
答案2
得分: 4
结构标签应该是key:"value",field:"name"的形式，例如：
type User struct {Name string `field:"name"`Age int64 `field:"age"`}
英文:
Struct tag supposed to be a key:"value", field:"name" for example.
type User struct {Name string `field:"name"`Age int64 `field:"age"`}
答案3
得分: 3
你可以使用json:"keyname"来代替另一个回答中提到的field。
type User struct {Name string `json:"name"`Age int64 `json:"age"`}
英文:
instead of field as in another answer you can use json:"keyname"
type User struct {Name string `json:"name"`Age int64 `json:"age"`}
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