Creating custom object encoder with a primitive array member

[madshov]

Hi, I'm using ObjectMarshaler to create log context for a given struct, so that I be able to use zap.Object:

logger = logger.With(
        zap.Object("order", order),
)
logger. Info("abc")

My Order struct contains a []string slice of keywords:

type Order struct {
	ID       string
	Price    int64
        Keywords []string
       ...
}

My question is how do I include this field in the object encoder for Order?

func (o Order) MarshalLogObject(enc zapcore.ObjectEncoder) error {
	enc.AddString("id", o.ID)
	enc.AddInt64("price", o.Price)
	enc.AddString("keywords", o.Keywords) // ???
       ...
}

[abhinav]

If you have a []string inside a ObjectMarshaler implementation,
you can re-use the zap.Strings field constructor
and add it to the encoder with Field.AddTo.

func (o Order) MarshalLogObject(enc zapcore.ObjectEncoder) error {
	enc.AddString("id", o.ID)
	enc.AddInt64("price", o.Price)
	zap.Strings("keywords", o.Keywords).AddTo(enc)
       // ...
}

Hope this helps!