golang recursive json to struct?

Question content

I have written python before, but I just started to get in touch with golang

Take my json as an example. The child does not know the number. It may be three or ten.

[{
    "id": 1,
    "name": "aaa",
    "children": [{
        "id": 2,
        "name": "bbb",
        "children": [{
            "id": 3,
            "name": "ccc",
            "children": [{
                "id": 4,
                "name": "ddd",
                "children": []
            }]
        }]
    }]
}]

I write the structure

type AutoGenerated []struct {
    ID       int    `json:"id"`
    Name     string `json:"name"`
    Children []struct {
        ID       int    `json:"id"`
        Name     string `json:"name"`
        Children []struct {
            ID       int    `json:"id"`
            Name     string `json:"name"`
            Children []struct {
                ID       int           `json:"id"`
                Name     string        `json:"name"`
                Children []interface{} `json:"children"`
            } `json:"children"`
        } `json:"children"`
    } `json:"children"`
}

But I think this is stupid. How to optimize?

Correct Answer

You can reuse it in its definition autogenerate Type:

type autogenerated []struct {
    id       int           `json:"id"`
    name     string        `json:"name"`
    children autogenerated `json:"children"`
}

Test it:

var o autogenerated

if err := json.unmarshal([]byte(src), &o); err != nil {
    panic(err)
}

fmt.println(o)

^{(src is your json input string.)}

Output (try on go playground):

[{1 aaa [{2 bbb [{3 ccc [{4 ddd []}]}]}]}]

It is easier to understand and use if autogenerate is not a slice itself:

type autogenerated struct {
    id       int             `json:"id"`
    name     string          `json:"name"`
    children []autogenerated `json:"children"`
}

Then use it/test it:

var o []AutoGenerated

if err := json.Unmarshal([]byte(src), &o); err != nil {
    panic(err)
}

fmt.Println(o)

The output is the same. Try this on go playground.

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