英文:
Golang json decoding fails on Array
问题
我有一个对象，如下所示：
a = [{"name": "rdj","place": "meh","meh": ["bow", "blah"]}]
我定义了一个结构体，如下所示：
type first struct {A []one}type one struct {Place string `json:"place"`Name string `json:"name"`}
当我在代码中使用相同的结构体时：
func main() {res, _ := http.Get("http://127.0.0.1:8080/sample/")defer res.Body.Close()var some firstrd := json.NewDecoder(res.Body)err := rd.Decode(&some)errorme(err)fmt.Printf("%+v\n", some)}
我得到以下错误：
panic: json: cannot unmarshal array into Go value of type main.first
我的理解是：
type first 定义了一个数组，数组中包含了 type one 定义的数据结构。
英文:
I have an object like:
a = [{"name": "rdj","place": "meh","meh" : ["bow", "blah"]}]
I defined a struct like:
type first struct {A []one}type one struct {Place string `json: "place"`Name string `json: "name"`}
when I use the same in code like:
func main() {res, _ := http.Get("http://127.0.0.1:8080/sample/")defer res.Body.Close()var some firstrd := json.NewDecoder(res.Body)err := rd.Decode(&some)errorme(err)fmt.Printf("%+v\n", some)}
I get the below error:
panic: json: cannot unmarshal array into Go value of type main.first
My understanding is:
type first defines the array and within that array is data structure defined in type one.
答案1
得分: 2
JSON是一个对象数组。使用以下类型：
type one struct { // 使用结构体表示JSON对象Place string `json:"place"`Name string `json:"name"`}...var some []one // 使用切片表示JSON数组rd := json.NewDecoder(res.Body)err := rd.Decode(&some)
问题中的类型与此JSON结构匹配：
{"A": [{"name": "rdj","place": "meh","meh": ["bow", "blah"]}]}
英文:
The JSON is an array of objects. Use these types:
type one struct { // Use struct for JSON objectPlace string `json: "place"`Name string `json: "name"`}...var some []one // Use slice for JSON arrayrd := json.NewDecoder(res.Body)err := rd.Decode(&some)
The the types in the question match this JSON structure:
{"A": [{"name": "rdj","place": "meh","meh" : ["bow", "blah"]}]}
答案2
得分: 1
@rickydj，
- 如果你需要将“first”作为一个独立的类型：
type first []one
- 如果你不介意将“first”作为一个独立的类型，可以按照上面 @Mellow Marmot 的建议简化为：
var some []one
英文:
@rickydj,
- If you need to have "first" as a separate type:
type first []one
- If you do not care about having "first" as a separate type, just cut down to
var some []one
as @Mellow Marmot suggested above.
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