我在 go 中有以下PartnerType“enum”結構：// PartnerType enumtype PartnerType intconst (    // PartnerTypeUnknown should never happen    PartnerTypeUnknown PartnerType = iota    // PartnerTypeTest test    PartnerTypeTest)func (t PartnerType) String() string {    names := [...]string{        "UNKNOWN",        "TEST"}    if t < PartnerTypeUnknown || t > PartnerTypeTest {        return names[0]    }    return names[t]}// MarshalJSON for enumfunc (t PartnerType) MarshalJSON() ([]byte, error) {    s := t.String()    return json.Marshal(s)}// UnmarshalJSON for enumfunc (t *PartnerType) UnmarshalJSON(b []byte) error {    *t = PartnerTypeUnknown    return nil}// MarshalText implements the text marshaller methodfunc (t *PartnerType) MarshalText() ([]byte, error) {    return []byte(t.String()), nil}// UnmarshalText implements the text unmarshaller methodfunc (t *PartnerType) UnmarshalText(text []byte) error {    *t = PartnerTypeUnknown    return nil}// Partner entitytype Partner struct {    ID   string `dynamodbav:"PK,omitempty"`    Foo string `dynamodbav:"SK,omitempty"`    PartnerType              PartnerType    `dynamodbav:",omitempty,string"`}在執行 a 時，dynamodbattribute.MarshalMap()我希望PartnerType將 my 存儲為字符串。dynamodbav結構標記允許您將 int 存儲為字符串 ( ) ，dynamodbav:",omitempty,string"但它不會調用我定義的.String()或Marshal/Unmarshal實現。換句話說，它存儲PartnerTypeTest為"1"not "TEST"。如何才能做到這一點？