protoc-go-valid

// UnifiedOrderReq 下单
type UnifiedOrderReq struct {
 AppName     string            `alipay:"required,size=1~50" wechat:"required,size=1~25"`  // 应用名
 GoodsName   string            `alipay:"required,size=1~150" wechat:"required,size=1~25"` // 商品名
 OutTradeNo  string            `alipay:"required,size=1~64" wechat:"required,size=1~25"`  // 商户订单号
 TotalAmount int32             `alipay:"required,ge=0" wechat:"required,ge=0"`            // 订单总金额，单位为分，详见支付金额
 NotifyUrl   string            `alipay:"required" wechat:"required"`                      // 回调地址
 TimeStart   string            `alipay:"required,datetime"` // 支付时间
 TimeExpire  string            `alipay:"required,datetime" wechat:"datetime"` // 交易过期时间
 OtherMap    map[string]string // 其他补充字段
}

syntax = "proto3";
package validator.examples;
import "github.com/mwitkow/go-proto-validators/validator.proto";

message InnerMessage {
    // some_integer can only be in range (0, 100).
    int32 some_integer = 1 [(validator.field) = {int_gt: 0, int_lt: 100}];
    // some_float can only be in range (0;1).
    double some_float = 2 [(validator.field) = {float_gte: 0, float_lte: 1}];
}

syntax = "proto3";
package examples;

message InnerMessage {
    // some_integer can only be in range (0, 100).
    int32 some_integer = 1; // @tag oto=0~100|应该在0~100
    // some_float can only be in range (0;1).
    double some_float = 2; // @tag oto=0~1|应该在0~1
}

outPdProjectPath="test" # pb 放入的项目路径
protoFileDirName="test" # proto 存放的目录

message Man {
    string name = 1; // 姓名 @tag valid:"required,to=1~3"
    int32 age = 2; // 年龄 @tag valid:"to=1~150"
}

type Man struct {
    state protoimpl.MessageState
    sizeCache protoimpl.SizeCache
    unknownFields protoimpl.UnknownFields

    Name string `protobuf:"bytes,1,opt,name=name,proto3" json:"name,omitempty" valid:"required,to=1~3"` // 姓名 @tag valid:"required,to=1~3"
    Age int32 `protobuf:"varint,2,opt,name=age,proto3" json:"age,omitempty" valid:"to=1~150"` // 年龄 @tag valid:"to=1~150"
}

m := &test.Man{
    Name: "xue",
    Age: -1,
}
fmt.Println(ValidateStruct(m))

// Output: "Man.Age" input "-1" is size less than 1