Struts2 form validation gets indefinite loops in web browsers Continue on the last email:
So if user input something wrong, I want to show the original form.jsp page with all the parameters extracted from the database along with error messages. So I need to go to the prepareAction first to gets these parameters, and then display them in form.jsp page. I tried to write things like: <result name="input"> prepare.action </result> However, it doesn't work. So I used the redirectAction type. But this caused 2 problems: 1. when validating user input, the logic causes a indefinite loop. The browser will detect this and stop forwarding after third loop. 2. error message lost during the redirectAction. As the actionError stored in a map in session, this object gets lost during the forwarding. I have to write this interceptor to keep actionError message in the session. The root to all these trouble is just because I want to display error message in the same page - form.jsp. I want user inputs stay in the input fields, and error messages shows above the fields. If I can persuade myself to display error messages on another jsp page, there wouldn't be so much trouble. But just to wonder, is it possible to achieve what I desired? Or is there any better design than what I did. Thank you very much for any help I can get. Cheers, Jipu -----Original Message----- From: Jipu Jiang [mailto:j.ji...@nesc.gla.ac.uk] Sent: 17 September 2009 11:17 To: Struts Users Mailing List Subject: RE: form validation gets indefinite loops in web browsers Hi Dale, Thanks for reply. I have a form that needs parameters from an action. So to see the JSP form, I'll have to go to the action first to prepare these parameters for the form, and then the JSP form will render these parameters. I'll show some sample code here. PrepareAction.java List<Parameter> parameters = new ArrayList<Parameter>(); Public String execute() throws Exception { Parameters = parameterService.getParameters(); // the service will then gets parameters from database. Return SUCCESS; } Struts.xml <action name="prepare" class="XXX"> <result name="success">form.jsp</result> <result name="input" type="redirectAction"> prepare </result> <result name="error">error.jsp</result> </action> Form.jsp <s:iterator value="parameters"> </s:iterator> What I want to achieve is to display the error messages along with the submission page if user input something wrong. It would be better if what user input can also stay on the submission page. -----Original Message----- From: Dale Newfield [mailto:d...@newfield.org] Sent: 16 September 2009 17:55 To: Struts Users Mailing List Subject: Re: form validation gets indefinite loops in web browsers Jipu Jiang wrote: > <result name="input" type="redirectAction"> prepare </result> Why are you redirecting? -Dale --------------------------------------------------------------------- To unsubscribe, e-mail: user-unsubscr...@struts.apache.org For additional commands, e-mail: user-h...@struts.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: user-unsubscr...@struts.apache.org For additional commands, e-mail: user-h...@struts.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: user-unsubscr...@struts.apache.org For additional commands, e-mail: user-h...@struts.apache.org
