encoding/json: Unmarshal and special character tag

[cdeadlock]

The below json demarshalling code will not detect the @rid field.

I can not tell what I am doing wrong here, is the @ symbol some kind of utf problem?

type TargetsResult struct{
  Result Targets "json: 'result'" 
}
type Targets []struct{
  Rid string "json: '@rid'"
  Toclaim string "json: 'toClaim'"
}

func TestJsonTarget(t *testing.T){
  //t.Skip()
  input := "{\"result\": [  {\"@rid\": \"#5:0\", \"toClaim\": \"testcode\"},{\"@rid\": \"#5:2\", \"toClaim\": \"second\"},{\"@rid\": \"#5:1\"}]}"
  var results TargetsResult
  if err := json.Unmarshal([]byte(input), &results); err != nil{
    fmt.Print(err) 
  }
  fmt.Print(results.Result)
}

Output:
[{ testcode} { second} { }]

If I unmarshal the same sample into the ugly

type TargetsResult map[string][]map[string]interface{}

I can access it with

results["result"][0]["@rid"].(string)

Besides this test where the input is a go string (a rune?) I also tested the actual result coming from an http REST response where the header specifically says utf8.

[mdempsky]

If you use json:"@rid" instead, it works: http://play.golang.org/p/TcmPNuwFsd

I can't explain why "json: 'toClaim'" works though. It seems like that's actually a bug.

[mdempsky]

Oh, right, the other tags weren't actually working. It's just that your struct fields were already named "Result" and "Toclaim".

Closing since it seems to be working as intended.

[cdeadlock]

Yes it appears I was confused by the super specific requirements for the struct tags:

You can not use single quote to make strings (' same key as double quote), only back-quote (` same key as tilde) this gives compilations errors

You can not have a space between the json: and the double quoted tag "@Rid" (no compilation errors, it just does not use it during demarshalling)
go version go1.2.1 linux/amd64

Thanks for the help