JSON nested struct to itself in Go Language

I have below JSON

[{
  "id": 8,
  "title": "Indonesia",
  "type": "country",
  "attributes": {
    "regionCode": "ID",
    "information": {
      "title": "Welcome to Indonesia",
      "content": "We only serve selected areas in Indonesia.",
      "image": "indo.png"
    }
  },
  "children": [
    {
      "id": 9,
      "title": "Jakarta",
      "type": "city",
      "attributes": {
        "regionCode": "ID-JKT",
        "information": {
          "title": "Welcome to Capital City of Indonesia",
          "content": "We only serve selected areas in Jabotabek",
          "image": "jakarta.png"
        }
      }       
    },
    {
      "id": 10,
      "title": "Bali",
      "type": "city",
      "attributes": {
        "regionCode": "ID-BAL",
        "information": {
          "title": "Welcome to the beach city Bali",
          "content": "We only serve selected areas in Bali.",
          "image": "bali.png"
        }   
      }       
    }
  ]
}]

Technically this is a nested structure to itself as the children node, and the children might have children as well. But i just couldnt get it right when im using unmarshal to decode this.

The working one is like below i have no problem defining the attribute as a separate struct so assuming i have locationAttribute struct

type locationNode []struct {
	ID         string             `json:"id"`
	Title      string             `json:"title"`
	Type       string             `json:"type"`
	Attributes locationAttribute `json:"attributes"`
	Children   []struct {
		ID         string             `json:"id"`
		Title      string             `json:"title"`
		Type       string             `json:"type"`
		Attributes locationAttribute `json:"attributes"`
		Children   []interface{}      `json:"children"`
	} `json:"children"`
}

However im expecting to be something like below

type locationNode []struct {
	ID         string             `json:"id"`
	Title      string             `json:"title"`
	Type       string             `json:"type"`
	Attributes locationAttribute `json:"attributes"`
	Children   []locationNode `json:"children"`
}

any help will be much appreciated

Using https://mholt.github.io/json-to-go/ your JSON converts to

type AutoGenerated struct {
	ID int `json:"id"`
	Title string `json:"title"`
	Type string `json:"type"`
	Attributes struct {
		RegionCode string `json:"regionCode"`
		Information struct {
			Title string `json:"title"`
			Content string `json:"content"`
			Image string `json:"image"`
		} `json:"information"`
	} `json:"attributes"`
	Children []struct {
		ID int `json:"id"`
		Title string `json:"title"`
		Type string `json:"type"`
		Attributes struct {
			RegionCode string `json:"regionCode"`
			Information struct {
				Title string `json:"title"`
				Content string `json:"content"`
				Image string `json:"image"`
			} `json:"information"`
		} `json:"attributes"`
	} `json:"children"`
}

Besides the fact that in the JSON text the "id" field is a number and not string, it works for me.

Omitting the "attributes" to make the example shorter:

type locationNode struct {
	ID       int            `json:"id"`
	Title    string         `json:"title"`
	Type     string         `json:"type"`
	Children []locationNode `json:"children"`
}

func main() {
	ln := locationNode{}

	err := json.Unmarshal([]byte(src), &ln)

	fmt.Printf("%+v %v\n", ln, err)
}

const src = `{
  "id": 8,
  "title": "Indonesia",
  "type": "country",
  "attributes": {
    "regionCode": "ID",
    "information": {
      "title": "Welcome to Indonesia",
      "content": "We only serve selected areas in Indonesia.",
      "image": "indo.png"
    }
  },
  "children": [
    {
      "id": 9,
      "title": "Jakarta",
      "type": "city",
      "attributes": {
        "regionCode": "ID-JKT",
        "information": {
          "title": "Welcome to Capital City of Indonesia",
          "content": "We only serve selected areas in Jabotabek",
          "image": "jakarta.png"
        }
      }       
    },
    {
      "id": 10,
      "title": "Bali",
      "type": "city",
      "attributes": {
        "regionCode": "ID-BAL",
        "information": {
          "title": "Welcome to the beach city Bali",
          "content": "We only serve selected areas in Bali.",
          "image": "bali.png"
        }   
      }       
    }
  ]
}`

Output (try it on the Go Playground):

{ID:8 Title:Indonesia Type:country Children:[{ID:9 Title:Jakarta Type:city Children:[]} {ID:10 Title:Bali Type:city Children:[]}]} <nil>

Okay I managed to resolve this - it's actually a silly careless mistake, since my struct is already an array I should NOT define the children as an array.

So below definition works

type locationNode []struct {
  ID         string             `json:"id"`
  Title      string             `json:"title"`
  Type       string             `json:"type"`
  Attributes locationAttribute  `json:"attributes"`
  Children   locationNode     `json:"children"`
}

It certainly looks like defining Children in the way you expect works fine. The following both marshals and unmarshals fine.

type Bob struct {
	ID         string            `json:"id"`
	Title      string            `json:"title"`
	Type       string            `json:"type"`
	Attributes int               `json:"attributes"`
	Children   []Bob             `json:"children"`
}

Playground link