格式化验证失败的错误信息, 默认tag=err, 支持重置默认tag

router/validator.go

@@ -0,0 +1,55 @@
+// Package router ...
+//
+// Description : router ...
+//
+// Author : go_developer@163.com<白茶清欢>
+//
+// Date : 2025-02-07 17:36
+package router
+
+import (
+	"errors"
+	"fmt"
+	"github.com/go-playground/validator/v10"
+	"reflect"
+	"strings"
+)
+
+// GetValidateErr 格式化错误信息
+//
+// Author : go_developer@163.com<白茶清欢>
+//
+// Date : 22:19 2025/1/15
+func GetValidateErr(obj any, rawErr error) error {
+	if nil == rawErr {
+		return nil
+	}
+	if nil == obj {
+		return rawErr
+	}
+	var (
+		ok             bool
+		validationErrs validator.ValidationErrors
+		errString      []string
+		field          reflect.StructField
+	)
+	if ok = errors.As(rawErr, &validationErrs); !ok {
+		return rawErr
+	}
+	objType := reflect.TypeOf(obj)
+	if objType.Kind() == reflect.Ptr {
+		objType = objType.Elem()
+	}
+	for _, validationErr := range validationErrs {
+		if field, ok = objType.FieldByName(validationErr.Field()); ok {
+			if e := field.Tag.Get(defaultValidateErrTag); e != "" {
+				errString = append(errString, fmt.Sprintf("%s: %s", field.Tag.Get("json"), e))
+				continue
+			} else {
+				errString = append(errString, fmt.Sprintf("%s: %v", field.Tag.Get("json"), validationErr.Value()))
+			}
+		}
+		errString = append(errString, validationErr.Error())
+	}
+	return errors.New(strings.Join(errString, "\n"))
+}