Hello, I have a slight problem with Tapestry. I have a Tapestry form which is as follows: *<form t:type="form" t:id="childminderRegistrationForm" validate="childminderAccount" clientValidation="none">* * <div>* * <t:errors/>* * </div>* * <div>* * <label t:type="label" for="accountEmailAddress"/>* * <input t:type="textfield" t:id="accountEmailAddress" value="childminderAccount.accountEmailAddress"/>* * </div>* * <div>* * <label t:type="label" for="accountFirstName"/>* * <input t:type="textfield" t:id="accountFirstName" value="childminderAccount.accountFirstName"/>* * </div>* * <div>* * <label t:type="label" for="accountLastName"/>* * <input t:type="textfield" t:id="accountLastName" value="childminderAccount.accountLastName"/>* * </div>* * <div>* * <label t:type="label" for="accountPassword"/>* * <input t:type="textfield" t:id="accountPassword" value="childminderAccount.accountPassword"/>* * </div>* * <div>* * <label t:type="label" for="accountPasswordConfirmation"/>* * <input t:type="textfield" t:id="accountPasswordConfirmation" value="accountPasswordConfirmation" validate="required"/>* * </div>* * <div>* * <label t:type="label" for="postcode"/>* * <input t:type="textfield" t:id="postcode" id="postcode" name="postcode" size="40"* * value="childminderAccount.postcodeByPostcodeId" translate="postcodeTranslator" validate="required"/>* * </div>* * <div>* * <input t:type="select" model="childminderStatusSelectModel" t:id="childminderStatus"* * value="childminderAccount.childMinderStatusByChildMinderStatusId" blankLabel="votre statut" blankOption="always" validate="required"/>* * </div>* * <div><input t:type="submit" type="submit" value="ok"/></div>* * </form>*
I try to prepare the entity that is going to be bound to the registration form as follows (from Tapestry class): *@OnEvent(EventConstants.PREPARE_FOR_RENDER)* * void prepare() {* * childminderAccount = new ChildminderAccount();//NOTICE HERE* * childMinderStatusList = service.loadChildminderStatusList();* * childminderStatusSelectModel = selectModelFactory.create(childMinderStatusList,"childMinderStatusDescription"); * * }* I still get this error the first time the form is loaded: *Render queue error in BeginRender[InscriptionProfessionnelGardeEnfant:accountemailaddress]: Class cannot be null (displayed in the browser)* *java.lang.IllegalArgumentException: Class cannot be null (displayed in the console)* * * Then, surprisingly when I hit F5 (refresh), the form is diplayed correctly. Can anyone please tell me how to avoid this exception? Also how I am supposed to properly obtain the instance of ChildminderAccount that is going to be populated by the user through the form? Regards, J.