Question: What is the correct way to have an array of struct?

[albertoleal]

Hi! How can I unmarshal an array of struct elements? (I've tried with ,inline, without , inline)

var data = `
current: batman
options:
  batman: something
  robin: another
`
type Target struct {
    Label    string
    Endpoint string
}
type Targets struct {
    Current string
    Options []Target ",inline"
}

func LoadTargets() (*Targets, error) {
    m := Targets{}
    err := yaml.Unmarshal([]byte(data), &m)
    if err != nil {
        log.Fatalf("error: %v", err)
    }
    fmt.Printf("--- m:\n%v\n\n", m)
    return &m, nil
}

thanks!

[advance512]

Note that your YAML is equivalent to:

current: batman
options: { batman: something, robin: another }

You are trying to unmarshal a YAML mapping into a Go slice. You could try this with:

current: batman
options:
  - batman: something
  - robin: another

But it still won't work. The problem lies in that the yaml lib looks in Target for a field name 'batman' or 'robin' to put the values into, and of course none exists. (inline only affects structs contained by other structs and isn't relevant here afaik.)

The problem is that the slice is of the element type Target. Change it to:

type Target map[string]string

And things will start working. Or, use this kind of YAML:

current: batman
options:
  - label: batman
    endpoint: something
  - label: robin
    endpoint: another

[albertoleal]

Great, thank you a lot!