关于IDL中optional与默认值的使用 是我姿势不对？

[kongmHUB]

Describe the Question

如下，可选参数加入校验逻辑后，如果req中没有sampleid的输入，
校验逻辑会报错,是我使用的姿势不对？

Reproducible Code

idl/sample.thrift

namespace go v1.sample

struct SampleReq {
    1: optional string sampleId (api.body="sampleid",api.vd="len($) > 0; msg:sprintf('invalid d: %v',$)") ; // 添加 api 注解为方便进行参数绑定
}

struct SampleResp {
    1: string RespBody;
}

service SampleService {
    SampleResp SampleMethod(1: SampleReq request) (api.post="/v1/sample");
}

Expected behavior

期望的处理流程应该是sampleid无输入时能skip掉校验。

Screenshots

Hertz version:

github.com/cloudwego/hertz v0.7.1

Environment:

GO111MODULE="on"
GOARCH="arm64"
GOBIN=""
GOCACHE="/Users/xxx/Library/Caches/go-build"
GOENV="/Users/xxx/Library/Application Support/go/env"
GOEXE=""
GOEXPERIMENT=""
GOFLAGS=""
GOHOSTARCH="arm64"
GOHOSTOS="darwin"
GOINSECURE=""
GOMODCACHE="/Users/xxx/go/pkg/mod"
GONOPROXY=""
GONOSUMDB=""
GOOS="darwin"
GOPATH="/Users/xxx/go"
GOPRIVATE=""
GOPROXY="https://goproxy.cn,direct"
GOROOT="/opt/homebrew/opt/go/libexec"
GOSUMDB="sum.golang.org"
GOTMPDIR=""
GOTOOLDIR="/opt/homebrew/opt/go/libexec/pkg/tool/darwin_arm64"
GOVCS=""
GOVERSION="go1.20.5"
GCCGO="gccgo"
AR="ar"
CC="cc"
CXX="c++"
CGO_ENABLED="1"
GOMOD="/Users/xxx/go/src/test/go.mod"
GOWORK=""
CGO_CFLAGS="-O2 -g"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-O2 -g"
CGO_FFLAGS="-O2 -g"
CGO_LDFLAGS="-O2 -g"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -arch arm64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/ss/mfhwtj4d2zd2v_d8m__nx1700000gn/T/go-build625561015=/tmp/go-build -gno-record-gcc-switches -fno-common"

Additional context

上面这个问题还可以在vd中加入“api.vd="$ == nil ||” 克服一下

可选+默认值，好像就没办法了。
按下面代码设置默认值后

# idl/sample.thrift
namespace go v1.sample

struct SampleReq {
    1: optional string sampleId = "test" (api.body="sampleid",api.vd="$ == nil || len($) > 0; msg:sprintf('invalid d: %v',$)") ; // 添加 api 注解为方便进行参数绑定
}

struct SampleResp {
    1: string RespBody;
}

service SampleService {
    SampleResp SampleMethod(1: SampleReq request) (api.post="/v1/sample");
}

生成的sample.go（部分）如下

// Code generated by thriftgo (0.3.2). DO NOT EDIT.

package sample

import (
	"context"
	"fmt"
	"github.com/apache/thrift/lib/go/thrift"
)

type SampleReq struct {
	// 添加 api 注解为方便进行参数绑定
	SampleId string `thrift:"sampleId,1,optional" form:"sampleid" json:"sampleid,omitempty" vd:"$ == nil || len($) > 0; msg:sprintf('invalid d: %v',$)"`
}

func NewSampleReq() *SampleReq {
	return &SampleReq{

		SampleId: "test",
	}
}

var SampleReq_SampleId_DEFAULT string = "test"

func (p *SampleReq) GetSampleId() (v string) {
	if !p.IsSetSampleId() {
		return SampleReq_SampleId_DEFAULT
	}
	return p.SampleId
}

var fieldIDToName_SampleReq = map[int16]string{
	1: "sampleId",
}

func (p *SampleReq) IsSetSampleId() bool {
	return p.SampleId != SampleReq_SampleId_DEFAULT
}
......

看上去像是判断这个参数是否有用户输入，
参数没有设置时，req.GetSampleId == nil，IsSetSampleId()是true

[li-jin-gou]

vd 支持 or 操作 https://github.com/bytedance/go-tagexpr/tree/master/validator optional没作用 cc @FGYFFFF