Posted on 2007-01-16 09:06
rednight 閱讀(752)
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一個頁面流在第一次使用時,內部屬性currentpage并沒有指定頁面,所以避免在begin方法里使用return-to: current page用法.同時在用的時候注意頁面流的工作方式
問題描述:
Error message like below in Web Page is displayed:
Page Flow:
/com/xxxx/xxx/xxx.jpf
Action:
update
Page Flow Error - No Relevant Page
You have tried to return to a recent page in the current page flow through return-to="currentPage",
but there is no appropriate page.
Exception's stack trace:
Exception: No previous page for return-to="currentPage" on action create in page flow
/com/gems/mt/web/CreateReleaseCntr/CreateReleaseCntrController.jpf.
com.bea.wlw.netui.pageflow.NoPreviousPageException: No relevant page for return-to="currentPage"
on action create in page flow /com/gems/mt/web/CreateReleaseCntr/CreateReleaseCntrController.jpf.
at com.bea.wlw.netui.pageflow.FlowController.doReturnToPage(FlowController.java:1328)
at com.bea.wlw.netui.pageflow.FlowController.forwardTo(FlowController.java:1023)
at com.bea.wlw.netui.pageflow.PageFlowController.forwardTo(PageFlowController.java:606)
at com.bea.wlw.netui.pageflow.FlowController.internalExecute(FlowController.java:765)
...
原因分析和解決方法:
When a new page flow is created and its current page is null (it mean you visit at the fist time),
so such an exception like NoPreviousPageException occur if you use return-to="currentPage".
if a new page flow finish a successful forward, it will treat last page as current page
so that we can use current page to display error message conveniently.
Solution:
ensure page flow finish a successful forward and use current page again.
You can also use path="specificPage.jsp" instead of return-to="currentPage"
if your original return-to is just one specific page.