how to unmarshal json object if object is returning as empty string instead of empty struct

Question

I\'m receiving some data as JSON, but if a object is empty, it does not return a empty struct but a empty string instead, and when unmarshaling, it returns an error.

So

Answer 1

Create a type like type ItemOrEmptyString item

And implement Unmarshal interface for it to handle your custom case.

func(ies *ItemOrEmptyString)UnmarshalJSON(d []byte) error{
    var i item
    if string(d) == `""` {
       return nil
    }
    err := json.Unmarshal(d, &i)
    *ies  = ItemOrEmptyString(i)
    return err
}

Full code here