格式化验证失败的错误信息, 默认tag=err, 支持重置默认tag

router/register_test.go

@@ -21,7 +21,7 @@ func (t TestController) Logic(ctx *gin.Context, formData *TestForm) (any, error)
 
 type TestForm struct {
 	Meta `tag:"测试表单" path:"/a/b/c/d" desc:"测试接口" method:"get"`
-	Age  int    `json:"age" form:"age" binding:"min=20"`
+	Age  int    `json:"age" form:"age" binding:"min=20" err_msg:"年龄不能小于20"`
 	Name string `json:"name" form:"name"`
 	Test *Test  `json:"test" form:"test"`
 	Num  *int64 `json:"num" form:"num"`
@@ -31,6 +31,7 @@ type Test struct {
 }
 
 func Test_parseController(t *testing.T) {
+	SetValidateErrTag("err_msg")
 	r := gin.Default()
 	Group(r, "test", nil, TestController{})
 	r.Run(":8080")