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CustomType has no getter? #477

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maros7 opened this issue Sep 6, 2018 · 9 comments
Open

CustomType has no getter? #477

maros7 opened this issue Sep 6, 2018 · 9 comments

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@maros7
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maros7 commented Sep 6, 2018

Are customtype Fields not supposed to generate a getter? The field is of message type. All other Fields generate with a getter. Even timestamp Fields having the stdtime extension. I’m using gogofaster.

@jmarais
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jmarais commented Sep 6, 2018

Hey.
Could you provide a example of such a message with the fields you mentioned and your customtype?

@maros7
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maros7 commented Sep 6, 2018

Sure. Below is an example/test proto that was generated with gogo (not gogofaster). But behaviour is the same. And as you can see both the fields that have the customtype option set lack a getter.

	protoc \
	--plugin=bin/protoc-gen-gojay \
	--proto_path=$(GOPATH)/src \
	--proto_path=$(GOPATH)/src/protobuf/proto \
	--proto_path=$(GOPATH)/src/github.com/gogo/protobuf/protobuf \
	--proto_path=. \
	--gogo_out=Mgoogle/protobuf/timestamp.proto=github.com/gogo/protobuf/types:$(GOPATH)/src \
	--gojay_out=Mgoogle/protobuf/timestamp.proto=github.com/gogo/protobuf/types:$(GOPATH)/src \
	test/examplepb/examplepb.proto

This is the proto file.

syntax = "proto3";
package examplepb;

import "protoc-gen-gojay/gojay.proto";
import "github.com/gogo/protobuf/gogoproto/gogo.proto";
import "google/protobuf/timestamp.proto";
import "common/big_decimal.proto";

option go_package = "examplepb";

option (gogoproto.equal_all) = true;
option (gogoproto.verbose_equal_all) = true;

message RequestMessage {
    enum RequestEnum {
        ZERO = 0;
        ONE = 1;
        TWO = 2;
        THREE = 3;
        FOUR = 4;
        FIVE = 5;
    }

    string string_value = 1;
    RequestEnum enum_value = 2;
}

enum ResponseEnum {
    ZERO = 0;
    ONE = 1;
    TWO = 2;
    THREE = 3;
    FOUR = 4;
    FIVE = 5;
}

message ResponseMessage {
    enum NestedResponseEnum {
        ZERO = 0;
        ONE = 1;
        TWO = 2;
        THREE = 3;
        FOUR = 4;
        FIVE = 5;  
    }

    message NestedResponseMessage {
        enum DeepNestedResponseEnum {
            ZERO = 0;
            ONE = 1;
            TWO = 2;
            THREE = 3;
            FOUR = 4;
            FIVE = 5;  
        }

        string string_value = 1;
        DeepNestedResponseEnum nested_response_enum = 2;
    }

    double double_value = 1;
    float float_value = 2;
    int32 int32_value = 3;
    int64 int64_value = 4;
    uint32 uint32_value = 5;
    uint64 uint64_value = 6;
    sint32 sint32_value = 7;
    sint64 sint64_value = 8;
    fixed32 fixed32_value = 9;
    fixed64 fixed64_value = 10;
    sfixed32 sfixed32_value = 11;
    sfixed64 sfixed64_value = 12;
    bool bool_value = 13;
    string string_value = 14;
    bytes bytes_value = 15;
    common.BigDecimal big_decimal_value = 16 [(gogoproto.customtype) = "go-decimal/pbdecimal.Decimal"];
    google.protobuf.Timestamp date_value = 17 [(gogoproto.stdtime) = true, (gojayproto.stdtime_format) = "date"];
    google.protobuf.Timestamp date_time_value = 18 [(gogoproto.stdtime) = true, (gojayproto.stdtime_format) = "date-time"];
    ResponseEnum enum_value = 19;
    NestedResponseEnum nested_enum_value = 38;
    NestedResponseMessage nested_message_value = 20;
    NestedResponseMessage.DeepNestedResponseEnum deep_nested_enum_value = 21;
    repeated double repeated_double_value = 22;
    repeated float repeated_float_value = 23;
    repeated int32 repeated_int32_value = 24;
    repeated int64 repeated_int64_value = 25;
    repeated uint32 repeated_uint32_value = 26;
    repeated uint64 repeated_uint64_value = 27;
    repeated sint32 repeated_sint32_value = 28;
    repeated sint64 repeated_sint64_value = 29;
    repeated fixed32 repeated_fixed32_value = 30;
    repeated fixed64 repeated_fixed64_value = 31;
    repeated sfixed32 repeated_sfixed32_value = 32;
    repeated sfixed64 repeated_sfixed64_value = 33;
    repeated bool repeated_bool_value = 34;
    repeated string repeated_string_value = 35;
    repeated bytes repeated_bytes_value = 36;
    repeated common.BigDecimal repeated_big_decimal_value = 37 [(gogoproto.customtype) = "go-decimal/pbdecimal.Decimal"];
    repeated ResponseEnum repeated_enum_value = 39;
    repeated NestedResponseEnum repeated_nested_enum_value = 40;
    repeated NestedResponseMessage repeated_nested_message_value = 41;
    repeated NestedResponseMessage.DeepNestedResponseEnum repeated_deep_nested_enum_value = 42;
}

This is my BigDecimal message.

syntax = "proto3";

package common;

import "github.com/gogo/protobuf/gogoproto/gogo.proto";

option go_package = "pbdecimal";

message BigDecimal {
    int32 scale = 1;
    BigInteger bigInteger = 2;
}

message BigInteger {
    bytes value = 1;
}

Extract from the generated go code.

type ResponseMessage struct {
	DoubleValue                 float64                                                        `protobuf:"fixed64,1,opt,name=double_value,json=doubleValue,proto3" json:"double_value,omitempty"`
	FloatValue                  float32                                                        `protobuf:"fixed32,2,opt,name=float_value,json=floatValue,proto3" json:"float_value,omitempty"`
	Int32Value                  int32                                                          `protobuf:"varint,3,opt,name=int32_value,json=int32Value,proto3" json:"int32_value,omitempty"`
	Int64Value                  int64                                                          `protobuf:"varint,4,opt,name=int64_value,json=int64Value,proto3" json:"int64_value,omitempty"`
	Uint32Value                 uint32                                                         `protobuf:"varint,5,opt,name=uint32_value,json=uint32Value,proto3" json:"uint32_value,omitempty"`
	Uint64Value                 uint64                                                         `protobuf:"varint,6,opt,name=uint64_value,json=uint64Value,proto3" json:"uint64_value,omitempty"`
	Sint32Value                 int32                                                          `protobuf:"zigzag32,7,opt,name=sint32_value,json=sint32Value,proto3" json:"sint32_value,omitempty"`
	Sint64Value                 int64                                                          `protobuf:"zigzag64,8,opt,name=sint64_value,json=sint64Value,proto3" json:"sint64_value,omitempty"`
	Fixed32Value                uint32                                                         `protobuf:"fixed32,9,opt,name=fixed32_value,json=fixed32Value,proto3" json:"fixed32_value,omitempty"`
	Fixed64Value                uint64                                                         `protobuf:"fixed64,10,opt,name=fixed64_value,json=fixed64Value,proto3" json:"fixed64_value,omitempty"`
	Sfixed32Value               int32                                                          `protobuf:"fixed32,11,opt,name=sfixed32_value,json=sfixed32Value,proto3" json:"sfixed32_value,omitempty"`
	Sfixed64Value               int64                                                          `protobuf:"fixed64,12,opt,name=sfixed64_value,json=sfixed64Value,proto3" json:"sfixed64_value,omitempty"`
	BoolValue                   bool                                                           `protobuf:"varint,13,opt,name=bool_value,json=boolValue,proto3" json:"bool_value,omitempty"`
	StringValue                 string                                                         `protobuf:"bytes,14,opt,name=string_value,json=stringValue,proto3" json:"string_value,omitempty"`
	BytesValue                  []byte                                                         `protobuf:"bytes,15,opt,name=bytes_value,json=bytesValue,proto3" json:"bytes_value,omitempty"`
	BigDecimalValue             *go_decimal_pbdecimal.Decimal     `protobuf:"bytes,16,opt,name=big_decimal_value,json=bigDecimalValue,customtype=go-decimal/pbdecimal.Decimal" json:"big_decimal_value,omitempty"`
	DateValue                   *time.Time                                                     `protobuf:"bytes,17,opt,name=date_value,json=dateValue,stdtime" json:"date_value,omitempty"`
	DateTimeValue               *time.Time                                                     `protobuf:"bytes,18,opt,name=date_time_value,json=dateTimeValue,stdtime" json:"date_time_value,omitempty"`
	EnumValue                   ResponseEnum                                                   `protobuf:"varint,19,opt,name=enum_value,json=enumValue,proto3,enum=examplepb.ResponseEnum" json:"enum_value,omitempty"`
	NestedEnumValue             ResponseMessage_NestedResponseEnum                             `protobuf:"varint,38,opt,name=nested_enum_value,json=nestedEnumValue,proto3,enum=examplepb.ResponseMessage_NestedResponseEnum" json:"nested_enum_value,omitempty"`
	NestedMessageValue          *ResponseMessage_NestedResponseMessage                         `protobuf:"bytes,20,opt,name=nested_message_value,json=nestedMessageValue" json:"nested_message_value,omitempty"`
	DeepNestedEnumValue         ResponseMessage_NestedResponseMessage_DeepNestedResponseEnum   `protobuf:"varint,21,opt,name=deep_nested_enum_value,json=deepNestedEnumValue,proto3,enum=examplepb.ResponseMessage_NestedResponseMessage_DeepNestedResponseEnum" json:"deep_nested_enum_value,omitempty"`
	RepeatedDoubleValue         []float64                                                      `protobuf:"fixed64,22,rep,packed,name=repeated_double_value,json=repeatedDoubleValue" json:"repeated_double_value,omitempty"`
	RepeatedFloatValue          []float32                                                      `protobuf:"fixed32,23,rep,packed,name=repeated_float_value,json=repeatedFloatValue" json:"repeated_float_value,omitempty"`
	RepeatedInt32Value          []int32                                                        `protobuf:"varint,24,rep,packed,name=repeated_int32_value,json=repeatedInt32Value" json:"repeated_int32_value,omitempty"`
	RepeatedInt64Value          []int64                                                        `protobuf:"varint,25,rep,packed,name=repeated_int64_value,json=repeatedInt64Value" json:"repeated_int64_value,omitempty"`
	RepeatedUint32Value         []uint32                                                       `protobuf:"varint,26,rep,packed,name=repeated_uint32_value,json=repeatedUint32Value" json:"repeated_uint32_value,omitempty"`
	RepeatedUint64Value         []uint64                                                       `protobuf:"varint,27,rep,packed,name=repeated_uint64_value,json=repeatedUint64Value" json:"repeated_uint64_value,omitempty"`
	RepeatedSint32Value         []int32                                                        `protobuf:"zigzag32,28,rep,packed,name=repeated_sint32_value,json=repeatedSint32Value" json:"repeated_sint32_value,omitempty"`
	RepeatedSint64Value         []int64                                                        `protobuf:"zigzag64,29,rep,packed,name=repeated_sint64_value,json=repeatedSint64Value" json:"repeated_sint64_value,omitempty"`
	RepeatedFixed32Value        []uint32                                                       `protobuf:"fixed32,30,rep,packed,name=repeated_fixed32_value,json=repeatedFixed32Value" json:"repeated_fixed32_value,omitempty"`
	RepeatedFixed64Value        []uint64                                                       `protobuf:"fixed64,31,rep,packed,name=repeated_fixed64_value,json=repeatedFixed64Value" json:"repeated_fixed64_value,omitempty"`
	RepeatedSfixed32Value       []int32                                                        `protobuf:"fixed32,32,rep,packed,name=repeated_sfixed32_value,json=repeatedSfixed32Value" json:"repeated_sfixed32_value,omitempty"`
	RepeatedSfixed64Value       []int64                                                        `protobuf:"fixed64,33,rep,packed,name=repeated_sfixed64_value,json=repeatedSfixed64Value" json:"repeated_sfixed64_value,omitempty"`
	RepeatedBoolValue           []bool                                                         `protobuf:"varint,34,rep,packed,name=repeated_bool_value,json=repeatedBoolValue" json:"repeated_bool_value,omitempty"`
	RepeatedStringValue         []string                                                       `protobuf:"bytes,35,rep,name=repeated_string_value,json=repeatedStringValue" json:"repeated_string_value,omitempty"`
	RepeatedBytesValue          [][]byte                                                       `protobuf:"bytes,36,rep,name=repeated_bytes_value,json=repeatedBytesValue" json:"repeated_bytes_value,omitempty"`
	RepeatedBigDecimalValue     []go_decimal_pbdecimal.Decimal    `protobuf:"bytes,37,rep,name=repeated_big_decimal_value,json=repeatedBigDecimalValue,customtype=go-decimal/pbdecimal.Decimal" json:"repeated_big_decimal_value,omitempty"`
	RepeatedEnumValue           []ResponseEnum                                                 `protobuf:"varint,39,rep,packed,name=repeated_enum_value,json=repeatedEnumValue,enum=examplepb.ResponseEnum" json:"repeated_enum_value,omitempty"`
	RepeatedNestedEnumValue     []ResponseMessage_NestedResponseEnum                           `protobuf:"varint,40,rep,packed,name=repeated_nested_enum_value,json=repeatedNestedEnumValue,enum=examplepb.ResponseMessage_NestedResponseEnum" json:"repeated_nested_enum_value,omitempty"`
	RepeatedNestedMessageValue  []*ResponseMessage_NestedResponseMessage                       `protobuf:"bytes,41,rep,name=repeated_nested_message_value,json=repeatedNestedMessageValue" json:"repeated_nested_message_value,omitempty"`
	RepeatedDeepNestedEnumValue []ResponseMessage_NestedResponseMessage_DeepNestedResponseEnum `protobuf:"varint,42,rep,packed,name=repeated_deep_nested_enum_value,json=repeatedDeepNestedEnumValue,enum=examplepb.ResponseMessage_NestedResponseMessage_DeepNestedResponseEnum" json:"repeated_deep_nested_enum_value,omitempty"`
	XXX_NoUnkeyedLiteral        struct{}                                                       `json:"-"`
	XXX_unrecognized            []byte                                                         `json:"-"`
	XXX_sizecache               int32                                                          `json:"-"`
}

func (m *ResponseMessage) Reset()         { *m = ResponseMessage{} }
func (m *ResponseMessage) String() string { return proto.CompactTextString(m) }
func (*ResponseMessage) ProtoMessage()    {}
func (*ResponseMessage) Descriptor() ([]byte, []int) {
	return fileDescriptor_examplepb_fade1495dedaf83f, []int{1}
}
func (m *ResponseMessage) XXX_Unmarshal(b []byte) error {
	return xxx_messageInfo_ResponseMessage.Unmarshal(m, b)
}
func (m *ResponseMessage) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
	return xxx_messageInfo_ResponseMessage.Marshal(b, m, deterministic)
}
func (dst *ResponseMessage) XXX_Merge(src proto.Message) {
	xxx_messageInfo_ResponseMessage.Merge(dst, src)
}
func (m *ResponseMessage) XXX_Size() int {
	return xxx_messageInfo_ResponseMessage.Size(m)
}
func (m *ResponseMessage) XXX_DiscardUnknown() {
	xxx_messageInfo_ResponseMessage.DiscardUnknown(m)
}

var xxx_messageInfo_ResponseMessage proto.InternalMessageInfo

func (m *ResponseMessage) GetDoubleValue() float64 {
	if m != nil {
		return m.DoubleValue
	}
	return 0
}

func (m *ResponseMessage) GetFloatValue() float32 {
	if m != nil {
		return m.FloatValue
	}
	return 0
}

func (m *ResponseMessage) GetInt32Value() int32 {
	if m != nil {
		return m.Int32Value
	}
	return 0
}

func (m *ResponseMessage) GetInt64Value() int64 {
	if m != nil {
		return m.Int64Value
	}
	return 0
}

func (m *ResponseMessage) GetUint32Value() uint32 {
	if m != nil {
		return m.Uint32Value
	}
	return 0
}

func (m *ResponseMessage) GetUint64Value() uint64 {
	if m != nil {
		return m.Uint64Value
	}
	return 0
}

func (m *ResponseMessage) GetSint32Value() int32 {
	if m != nil {
		return m.Sint32Value
	}
	return 0
}

func (m *ResponseMessage) GetSint64Value() int64 {
	if m != nil {
		return m.Sint64Value
	}
	return 0
}

func (m *ResponseMessage) GetFixed32Value() uint32 {
	if m != nil {
		return m.Fixed32Value
	}
	return 0
}

func (m *ResponseMessage) GetFixed64Value() uint64 {
	if m != nil {
		return m.Fixed64Value
	}
	return 0
}

func (m *ResponseMessage) GetSfixed32Value() int32 {
	if m != nil {
		return m.Sfixed32Value
	}
	return 0
}

func (m *ResponseMessage) GetSfixed64Value() int64 {
	if m != nil {
		return m.Sfixed64Value
	}
	return 0
}

func (m *ResponseMessage) GetBoolValue() bool {
	if m != nil {
		return m.BoolValue
	}
	return false
}

func (m *ResponseMessage) GetStringValue() string {
	if m != nil {
		return m.StringValue
	}
	return ""
}

func (m *ResponseMessage) GetBytesValue() []byte {
	if m != nil {
		return m.BytesValue
	}
	return nil
}

func (m *ResponseMessage) GetDateValue() *time.Time {
	if m != nil {
		return m.DateValue
	}
	return nil
}

func (m *ResponseMessage) GetDateTimeValue() *time.Time {
	if m != nil {
		return m.DateTimeValue
	}
	return nil
}

func (m *ResponseMessage) GetEnumValue() ResponseEnum {
	if m != nil {
		return m.EnumValue
	}
	return ResponseEnum_ZERO
}

func (m *ResponseMessage) GetNestedEnumValue() ResponseMessage_NestedResponseEnum {
	if m != nil {
		return m.NestedEnumValue
	}
	return ResponseMessage_ZERO
}

func (m *ResponseMessage) GetNestedMessageValue() *ResponseMessage_NestedResponseMessage {
	if m != nil {
		return m.NestedMessageValue
	}
	return nil
}

func (m *ResponseMessage) GetDeepNestedEnumValue() ResponseMessage_NestedResponseMessage_DeepNestedResponseEnum {
	if m != nil {
		return m.DeepNestedEnumValue
	}
	return ResponseMessage_NestedResponseMessage_ZERO
}

func (m *ResponseMessage) GetRepeatedDoubleValue() []float64 {
	if m != nil {
		return m.RepeatedDoubleValue
	}
	return nil
}

func (m *ResponseMessage) GetRepeatedFloatValue() []float32 {
	if m != nil {
		return m.RepeatedFloatValue
	}
	return nil
}

func (m *ResponseMessage) GetRepeatedInt32Value() []int32 {
	if m != nil {
		return m.RepeatedInt32Value
	}
	return nil
}

func (m *ResponseMessage) GetRepeatedInt64Value() []int64 {
	if m != nil {
		return m.RepeatedInt64Value
	}
	return nil
}

func (m *ResponseMessage) GetRepeatedUint32Value() []uint32 {
	if m != nil {
		return m.RepeatedUint32Value
	}
	return nil
}

func (m *ResponseMessage) GetRepeatedUint64Value() []uint64 {
	if m != nil {
		return m.RepeatedUint64Value
	}
	return nil
}

func (m *ResponseMessage) GetRepeatedSint32Value() []int32 {
	if m != nil {
		return m.RepeatedSint32Value
	}
	return nil
}

func (m *ResponseMessage) GetRepeatedSint64Value() []int64 {
	if m != nil {
		return m.RepeatedSint64Value
	}
	return nil
}

func (m *ResponseMessage) GetRepeatedFixed32Value() []uint32 {
	if m != nil {
		return m.RepeatedFixed32Value
	}
	return nil
}

func (m *ResponseMessage) GetRepeatedFixed64Value() []uint64 {
	if m != nil {
		return m.RepeatedFixed64Value
	}
	return nil
}

func (m *ResponseMessage) GetRepeatedSfixed32Value() []int32 {
	if m != nil {
		return m.RepeatedSfixed32Value
	}
	return nil
}

func (m *ResponseMessage) GetRepeatedSfixed64Value() []int64 {
	if m != nil {
		return m.RepeatedSfixed64Value
	}
	return nil
}

func (m *ResponseMessage) GetRepeatedBoolValue() []bool {
	if m != nil {
		return m.RepeatedBoolValue
	}
	return nil
}

func (m *ResponseMessage) GetRepeatedStringValue() []string {
	if m != nil {
		return m.RepeatedStringValue
	}
	return nil
}

func (m *ResponseMessage) GetRepeatedBytesValue() [][]byte {
	if m != nil {
		return m.RepeatedBytesValue
	}
	return nil
}

func (m *ResponseMessage) GetRepeatedEnumValue() []ResponseEnum {
	if m != nil {
		return m.RepeatedEnumValue
	}
	return nil
}

func (m *ResponseMessage) GetRepeatedNestedEnumValue() []ResponseMessage_NestedResponseEnum {
	if m != nil {
		return m.RepeatedNestedEnumValue
	}
	return nil
}

func (m *ResponseMessage) GetRepeatedNestedMessageValue() []*ResponseMessage_NestedResponseMessage {
	if m != nil {
		return m.RepeatedNestedMessageValue
	}
	return nil
}

func (m *ResponseMessage) GetRepeatedDeepNestedEnumValue() []ResponseMessage_NestedResponseMessage_DeepNestedResponseEnum {
	if m != nil {
		return m.RepeatedDeepNestedEnumValue
	}
	return nil
}

@maros7
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maros7 commented Sep 7, 2018

Another observation related to customtype is that it doesn't generate a slice of pointers for repeated customtype fields. repeated common.BigDecimal repeated_big_decimal_value = 37 [(gogoproto.customtype) = "go-decimal/pbdecimal.Decimal"]; generates RepeatedBigDecimalValue []go_decimal_pbdecimal.Decimal. I expected RepeatedBigDecimalValue []*go_decimal_pbdecimal.Decimal But I can open a separate issue for this matter.

@jmarais
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jmarais commented Sep 7, 2018

Thanks for your example.

I had a look and you are right, we are currently not generating 'getters' for customtype fields.

I think one problem with customtype getters was how do you determine what is the default value if that field was not set. It might be possible to come up with something that could work. However I will to think about it.
But you are also welcome to attempt a fix if you had one in mind.

In the mean time you could add getter methods in the same package as your generated code.
Something like:

message foo {
    bytes customtype = 1 [(gogoproto.customtype) = "T"];
}
func (m *Foo) GetTValue() *T {
	if m != nil {
		return m.Customtype
	}
	return &T{}
}

I will also add this to the list of Warning and Issues on the custom type documentation:
https://github.com/gogo/protobuf/blob/master/custom_types.md

Another observation related to customtype is that it doesn't generate a slice of pointers for repeated customtype fields.

Thanks.

But I can open a separate issue for this matter.

Yes, please do so.

@maros7
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maros7 commented Sep 7, 2018

Sure, that is my current workaround. I.e. having an additional plugin that generates getters for those customtype fields. I could dig into this. Maybe you could just give some pointers where the logic around customtype resides?

@jmarais
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jmarais commented Sep 7, 2018

Great. The logic of the getter generation resides here:
https://github.com/gogo/protobuf/blob/master/protoc-gen-gogo/generator/generator.go#L2558-L2702

@jmarais
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jmarais commented Sep 15, 2018

I thought about it a bit more keeping:
https://developers.google.com/protocol-buffers/docs/proto3#default
in mind.
It might be non trivial to create getters for customtypes.
The getters should be able to return a default value of the custom type if it is not set, and at the generation stage we only know that a field is of customtype because of the field option. The field option only has a string name of the custom type. So it might be difficult to determine how to create a new "default" thing of that custom type.

@maros7
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maros7 commented Sep 17, 2018

Hi, I haven't had any bandwidth to dig into this. But you are quite right. It seems like it would be hard. With regards to stdtime you are just returning nil though?

func (m *ResponseMessage) GetDateValue() *time.Time {
	if m != nil {
		return m.DateValue
	}
	return nil
}

@ivanovaleksey
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Hello, I have faced with it too. Is it still hard to implement? Maybe something changed?

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