[Question] Can not bind parameter of struct using ReadBody

[soarchorale]

Describe the bug
I use iris as a simple web server and found a problem in parameter binding. When I send two int64 parameters with Get method, the second parameter will not bind to my struct. This problem may not the regular of bug description but occurred when I debug and step into the variable.

To Reproduce
Steps to reproduce the behavior:

// 1. My struct is defined as:
type GTClip struct {
	Id      int64  `gorm:"column:id" json:"id"`
	Clip    string `gorm:"column:clip" json:"clip"`
	Scene   string `gorm:"column:scene" json:"scene"`
	Path    string `gorm:"column:path" json:"path"`
	SetId   int64  `gorm:"column:set_id" json:"set_id"`
	Deleted int    `gorm:"column:deleted" json:"-"`
}
// 2. the route and function implemented as:
	gt := app.Party("/gt")
	{
		gt.Use(iris.Compression)
		clip := gt.Party("/clip")
		{
			// ... other unrelated method
			clip.Get("/list", func (ctx iris.Context) {
	                          var (
		                          gtClipReq  = &model.GTClip{}
		                          err        error
	                          )
	                          if err := ctx.ReadBody(gtClip); err != nil { // step point 1
		                          ctx.StopWithError(iris.StatusBadRequest, err)
		                          return
	                          }
	                          if gtClip.SetId, err = ctx.URLParamInt64("set_id"); err != nil {  // step point 2
		                          ctx.StopWithError(iris.StatusBadRequest, err)
		                          return
	                          }
	                          ctx.JSON(iris.Map{
		                          "code": 0,
		                          "err":  nil,
	                          })
                          })
		}
	}

3. launch server and send request: http://127.0.0.1:8080/gt/clip/list?id=11&set_id=12
   Expected behavior
   The struct GTClip menber of Id and SetId should be bind as 11 and 12 respectively, with above requests. But until called function "ctx.URLParamInt64("set_id")", the member SetId is not binded the expected value 12. As comment at "step point 1".
   After calling the ctx.URLParamInt64("set_id"), SetId is set to 12. As comment at "step point 2".
   Another experiment is that if I add a parameter scene, member of Scene will be correctly binded! eg: http://127.0.0.1:8080/gt/clip/list?id=11&set_id=11&scene=turn
   Screenshots
   
   

Desktop (please complete the following information):

• OS: macOs 13.2 (22D49)

iris.Version

• v12.2.8

Please make sure the bug is reproducible over the main branch:
YES, the version I updated is v12.2.11-0.20240122133509-ddda4f699854, still has same problem

Additional context
I think there might be some misunderstand when I use ctx.ReadBody method. In fact I can't remember such many parameter binding methods and always use ctx.ReadBody instead. Am I right?