Populate a struct with an array of sub-structs to turn into json

I’m trying to post some JSON. Using the JSON-to-Go tool I have this struct defined:

type IssueSetState struct {
	ID           string `json:"id"`
	CustomFields []struct {
		Value struct {
			Name string `json:"name"`
		} `json:"value"`
		Name string `json:"name"`
		Type string `json:"$type"`
	} `json:"customFields"`
}

I’m trying to populate it with some data that I can then pass into the http library:

	jsonValues := &IssueSetState{
		ID: resultEntityId.ID,
		CustomFields: []{
			Value: {
				Name: "Fixed",
			},
			Name: "State",
			Type: "StateIssueCustomField",
		},
	}
	jsonEncoded := new(bytes.Buffer)
	json.NewEncoder(jsonEncoded).Encode(jsonValues)

I keep getting errors like:

./main.go:245:19: syntax error: unexpected {, expecting type
./main.go:246:9: syntax error: unexpected :, expecting comma or }
./main.go:249:8: syntax error: unexpected : at end of statement
./main.go:251:4: syntax error: unexpected comma after top level declaration

I’m sure the mistake I’m making is a simple one, but I’m new to Go.

One possible way is to define named structs for every anonymous struct you have.

type IssueSetState struct {
	ID           string        `json:"id"`
	CustomFields []CustomField `json:"customFields"`
}

type CustomField struct {
	Value Value  `json:"value"`
	Name  string `json:"name"`
	Type  string `json:"type"`
}

type Value struct {
	Name string `json:"name"`
}

Now you can create it like this:

IssueSetState{
	ID: resultEntityId.ID,
	CustomFields: []CustomField{
		{
			Value: Value{
				Name: "Fixed",
			},
			Name: "State",
			Type: "StateIssueCustomField",
		},
		{
			Value: Value{
				Name: "Fixed",
			},
			Name: "State",
			Type: "StateIssueCustomField",
		},
	},
}

So you're initializing the jsonValue badly.

You can fix it in 2 ways:

1. https://play.golang.org/p/LFO4tOLyG60

   making structures flat

2. https://play.golang.org/p/TyFfaMf7XeF

   by repeating the structure definition when declaring value

The first one should be easier and clearer.