将json成员字段包装为对象

Question

My objective is to add fields to json on user request.

Everything is great, but when displaying the fields with

fmt.Printf("%s: %s
", content.Date, content.Description)

an error occurs:

invalid character '{' after top-level value

And that is because after adding new fields the file looks like this:

{"Date":"2017-03-20 10:46:48","Description":"new"}
{"Date":"2017-03-20 10:46:51","Description":"new .go"}

The biggest problem is with the writting to file

reminder := &Name{dateString[:19], text} //text - input string
newReminder, _ := json.Marshal(&reminder)

I dont really know how to do this properly

My question is how should I wrap all member fields into one object? And what is the best way to iterate through member fields?

The code is available here: https://play.golang.org/p/NunV_B6sud

Answer 1

So after some research, people in the go-nuts group helped me and suggested me to use a streaming json parser that parses items individually.

So I needed to change my reminder listing function:

func listReminders() error {
    f, err := os.Open("rem.json")
    if err != nil {
        return err
    }
    dec := json.NewDecoder(f)
    for {
        var content Name
        switch dec.Decode(&content) {
        case nil:
            fmt.Printf("%#v
", content)
        case io.EOF:
            return nil
        default:
            return err
        }
    }
}

Now everything works the way I wanted.