Java – wicket dropdownchoice cannot use propertymodels normally

I've been trying to debug why my dropdownchoice is just a simple form. Only dropdown and a submit button don't work properly for hours now

It has a very strange behavior The first value selected in the drop-down option is successfully sent to the location of the server, after which the model will not update any other selections That is, if I have a list person and I select a second person, it will be submitted successfully However, when you select someone else and try to submit again, it always shows the first selected option

Here's a code snippet:

ChoiceRenderer<Empowerment> empowermentChoiceRenderer = new ChoiceRenderer<>("name","id");
 final DropDownChoice<Empowerment> empowermentDropDownChoice =
                    new DropDownChoice<>("empowerment",new PropertyModel<Empowerment>(this,"empowerment"),empowermentList,empowermentChoiceRenderer);
 empowermentDropDownChoice.setrequired(true);
 add(empowermentDropDownChoice);

The only way I can get a decent behavior is that I set the employment variable to null In this case, the authorization is reinitialized to null at commit time, and then the new commit works normally

Authorization is just a JPA entity

I'm glad to know if this is a known problem I'm on wicket 6.9 1 and wicket 6.12

resolvent

Solution

Finally, the solution to the problem is found The above code is correct, but the problem is the entity class itself – empowerment needs to implement equals and hashcode correctly

Dropdownchoice has worked well since then