How to reach nested struct elements

I have struct like this. And I want to parse my Json to this struct. But I can not reach nested structs.

I was expecting to reach sub structs for like, but I can not:

func main() {
	str := `[{
		"ApplicationDefaults":  {
			"ApplicationPoolName": "DefaultAppPool",
     			....
	}]`

	mdl := foo(str)

	// mdl.ApplicationDefaults ?? I can't reach like this. There are only a few functions like: append!, last! , print!, range!, reverse!, sort!, var!
}

Any one help?

My struct:

package model

type SitesDetails []struct {
	ApplicationDefaults struct {
		ApplicationPoolName string      `json:"ApplicationPoolName"`
		EnabledProtocols    string      `json:"EnabledProtocols"`
		Attributes          string      `json:"Attributes"`
		ChildElements       string      `json:"ChildElements"`
		ElementTagName      string      `json:"ElementTagName"`
		IsLocallyStored     bool        `json:"IsLocallyStored"`
		Methods             interface{} `json:"Methods"`
		RawAttributes       string      `json:"RawAttributes"`
		Schema              string      `json:"Schema"`
	} `json:"ApplicationDefaults"`
	Applications []string `json:"Applications"`
	Bindings     []string `json:"Bindings"`
	ID           int      `json:"Id"`
	Limits       struct {
		ConnectionTimeout string      `json:"ConnectionTimeout"`
		MaxBandwidth      int64       `json:"MaxBandwidth"`
		MaxConnections    int64       `json:"MaxConnections"`
		MaxURLSegments    int         `json:"MaxUrlSegments"`
		Attributes        string      `json:"Attributes"`
		ChildElements     string      `json:"ChildElements"`
		ElementTagName    string      `json:"ElementTagName"`
		IsLocallyStored   bool        `json:"IsLocallyStored"`
		Methods           interface{} `json:"Methods"`
		RawAttributes     string      `json:"RawAttributes"`
		Schema            string      `json:"Schema"`
	} `json:"Limits"`
}

This is the code that I use for parse json to my struct :

func foo(resp string) model.SitesDetails {
	data := []byte(resp)

	var m model.SitesDetails
	err := json.Unmarshal(data, &m)
	if err != nil {
		log.Fatal(err)
	}
	return m
}

You're unmarshalling into a slice here (as your SitesDetails type is a []struct and your json starts with an array), so you should be able to access your details via

poolName := model[0].ApplicationDefaults.ApplicationPoolName

This also explains why your IDE only suggests actions that can be applied to slices, such as appending (which I guess would insert the proper code to append to your slice).

By the way, you really shouldn't call your variable model, as that's the name your apparently using for your package as well (you're using model.SitesDetails), so your variable name would shadow the package at that point - this could cause great confusion down the line and any decent IDE should warn you about that.