> <action path= "/ProcessCountryForm" > type= > "com.example.action.ProcessCountryFormAction" > scope= "request" > name= "countryForm" > input= "/SetUpCountryForm"> > <forward name= "success" > path="success-page" redirect="false"/> > <forward name= "failure" > path="error-page" redirect="false"/> > </action> > Note that the input attribute value must be the URI and not just the action mapping name. So in your /ProcessCountryForm configuration, input should be /do/SetUpCountryForm or /SetUpCountryForm.do which ever you use.
> In addition to this, the actual JSP has to > be non-static, that is, it is JSPs > responsibility to take any data it needs > from the HTTP Request and populate the HTML > form with it, is that correct? (i.e. this is > not done auto-magically by Struts - it is up > to the JSP developer to add code to do that > to the JSP)? No. Struts will automatically populate the form if you are using the appropriate <html:*/> tags. robert > -----Original Message----- > From: otisg [mailto:[EMAIL PROTECTED]] > Sent: Wednesday, February 19, 2003 2:44 PM > To: Robert Taylor; Struts Users Mailing List > Subject: RE: RE: handling form errors in Actions, returning to form, > prepopulating them without re-POSTING > > > Aha! Thank you for clarifying this. > So, in Struts config-speak, is this all that > is needed to do what you described: > > <action-mappings> > > <action path= "/SetUpCountryForm" > type= > "com.example.action.SetUpCountryFormAction" > scope= "request" > name= "countryForm" > input= > "/WEB-INF/country-form.jsp"> > <forward name= "success" > path="country-form-page" redirect="false"/> > <forward name= "failure" > path="error-page" redirect="false"/> > </action> > > <action path= "/ProcessCountryForm" > type= > "com.example.action.ProcessCountryFormAction" > scope= "request" > name= "countryForm" > input= "/SetUpCountryForm"> > <forward name= "success" > path="success-page" redirect="false"/> > <forward name= "failure" > path="error-page" redirect="false"/> > </action> > > </action-mappings> > > > In addition to this, the actual JSP has to > be non-static, that is, it is JSPs > responsibility to take any data it needs > from the HTTP Request and populate the HTML > form with it, is that correct? (i.e. this is > not done auto-magically by Struts - it is up > to the JSP developer to add code to do that > to the JSP)? > > Thank you, > Otis > > > > ---- On Wed, 19 Feb 2003, Robert Taylor > ([EMAIL PROTECTED]) wrote: > > > Wrong. If you look more closely I offered > a solution that allows > > you to avoid putting data in session scope. > > > > > > "Rick, I usually define the setUpForm > action URI as the input attribute > > of the processForm action element. That > way if a validation error occurs > > the request is forwarded to the setUpForm > action which repopulates the list > > and forwards to the page where my list is > displayed along with the error > > message and the users input. > > > > Works for me and I don't have to place > anything in the session." > > > > > > - SetUpAction prepares the page to be > displayed. For example, > > populate the form associated with this > action with a list of > > countries. Let's put the form in request > scope. > > > > - ProcessAction processes the user input. The > > input attribute value of the action > element for the > > ProcessAction action mapping is defined > to be > > the uri which invokes the SetUpAction. > > > > - When a validation error, the appropriate > error messages are > > created and the request is forwarded to > the SetUpAction where > > the page is prepared. The request > contains all the user input > > and the SetUpAction (once again) > populates the countries in > > the form. > > > > - The request is then forwarded to the > .jsp page where the > > data which the user entered is rendered > along with their > > invalid input which caused the > validation errors. > > > > - Nothing in session scope. > > > > To answer your specific questions: > > > > > But how does one do these things: > > > > > > A. Get the user back the input form > > Upon validation error, struts will forward the > > request to the URI defined in the input > attribute value > > of the action element of the action mapping > > defined for the action which processes the > user input. > > In the above example would be for > ProcessAction. > > > > > > > > B. Display the error message > > Struts validation will create ActionErrors and > > place them in the request. Assuming you > are using > > StrutsValidator. > > > > > > > C. Make sure that all possible fields are > > Since the request is forwarded, all user input > > still exists in the request and thus the form. > > > > > > > D. The pull-down in the form has that same > > > list of countries > > Since you are being forwarded to the > SetUpAction (see above example) > > your countries will be re-populated. > > > > robert > > > > > -----Original Message----- > > > From: otisg [mailto:[EMAIL PROTECTED]] > > > Sent: Wednesday, February 19, 2003 1:37 PM > > > To: Struts Users Mailing List > > > Subject: Re: RE: handling form errors in > Actions, returning to form, > > > prepopulating them without re-POSTING > > > > > > > > > Thanks. > > > However, that thread really says one thing - > > > put everything in session scope and don't > > > worry about it :) > > > > > > But how does one do these things: > > > > > > A. Get the user back the input form > > > > > > -- Is it by just finding a 'failure' forward > > > that points to the original JSP with the > form? > > > > > > B. Display the error message > > > > > > -- I guess the errors are saved either in > > > Session or Request, ok. > > > > > > C. Make sure that all possible fields are > > > pre-populated with data that the user > > > already entered > > > > > > -- Is this up to the JSP develop to do, > > > perhaps with the help of > > > some Struts JSP tags or does this happen > > > automagically? > > > > > > D. The pull-down in the form has that same > > > list of countries > > > > > > -- Yes, a developer could just save this in > > > Session scope, but if that is not desired, > > > then how is this re-retrieved if the user it > > > forwarded to a JSP? The user would need to > > > be re-sent to the original action that > > > retrieved the list, no? > > > > > > E. The user is not prompted with 'Do you > > > want to re-POST' dialog > > > > > > -- Does this happen automagically? > > > > > > Thanks, > > > Otis > > > > > > > > > > > > > > > ---- On Wed, 19 Feb 2003, Robert Taylor > > > ([EMAIL PROTECTED]) wrote: > > > > > > > > > > > http://www.mail-archive.com/struts-user@jakarta.apache.org/msg58515.html > > > > > > > > > -----Original Message----- > > > > > From: otisg [mailto:[EMAIL PROTECTED]] > > > > > Sent: Wednesday, February 19, 2003 > 12:39 PM > > > > > To: [EMAIL PROTECTED] > > > > > Subject: handling form errors in > > > Actions, returning to form, > > > > > prepopulating them without re-POSTING > > > > > > > > > > > > > > > Hello, > > > > > > > > > > We are starting to use Struts and are > > > > > wondering how Struts users handle > scenarios > > > > > such as this one: > > > > > > > > > > 1. /ShowForm action gets called, > mapped to > > > > > ShowFormAction. > > > > > ShowFormAction pulls a list of > countries > > > > > from the DB (for ex.), > > > > > stick that list in the HTTP > request, and > > > > > 'forwards' to 'ok', > > > > > which is a JSP with a form that > consists > > > > > of blank form fields > > > > > and a pull-down with countries > that it > > > > > gets from the HTTP req. > > > > > > > > > > 2. A user fills the form, but forgets a > > > > > required field before he > > > > > submits the form by POSTing to > > > > > /SubmitForm action. > > > > > > > > > > 3. /SubmitForm is mapped to > SubmitFormAction > > > > > which detects a > > > > > missing required field. Is puts > error > > > > > messages in an instance > > > > > of ActionErrors. It now needs to > forward > > > > > to something other > > > > > than 'ok'. > > > > > > > > > > What we want to happen at this point is: > > > > > > > > > > A. Get the user back the input form > > > > > B. Display the error message > > > > > C. Make sure that all possible > fields are > > > > > pre-populated with > > > > > data that the user already entered > > > > > D. The pull-down in the form has > that same > > > > > list of countries > > > > > E. The user is not prompted with 'Do you > > > > > want to re-POST' dialog > > > > > > > > > > How can this be done? > > > > > > > > > > In our Struts config we have: > > > > > > > > > > <!-- gets a list of countries > from DB, > > > > > puts them in Request, > > > > > forwards to 'ok' --> > > > > > <action path= "/ShowForm" > > > > > type= > > > > > "net.wgen.ampng.action.ShowFormAction" > > > > > scope= "request"> > > > > > <forward name= "ok" > > > > > path="/WEB-INF/v/form-ok.jsp"/> > > > > > <forward name= "failure" > > > > > path="/WEB-INF/v/form-not.jsp"/> > > > > > </action> > > > > > > > > > > <!-- gets form data and > processes it --> > > > > > <action path= "/SubmitForm" > > > > > type= > > > > > "net.wgen.ampng.action.SubmitFormAction" > > > > > scope= "request" > > > > > validate= "true" > > > > > name= "myForm" > > > > > input= > > > "/WEB-INF/v/form.jsp"> > > > > > <forward name= "ok" > > > > > path="/WEB-INF/v/ok.jsp"/> > > > > > <forward name= "failure" > > > > > path="/WEB-INF/v/form.jsp"/> > > > > > </action> > > > > > > > > > > > > > > > What is the best way to handle this and > > > > > achieve A, B, C, D, and E that I > mentioned > > > > > above? > > > > > > > > > > If SubmitFormAction encounters an error > > > > > (e.g. a missing required field), > what should > > > > > it forward to? The original JSP in > 'input' > > > > > attribute? The JSP mapped to > 'failure' (the > > > > > same JSP with the original form)? > > > > > Should it forward/chain to another > Action > > > > > that redirects back to the original > form? > > > > > (but that would lose the form data + > error > > > > > messages in the Request, wouldn't it?) > > > > > Something else? > > > > > Does the JSP with the form need to > contain > > > > > the logic for pulling errors + form data > > > > > from the request, if it exists? > > > > > > > > > > This seems like a situation that > would be > > > > > very common and I feel that Struts > has some > > > > > elegant way for handling this. > > > > > > > > > > Thank you, > > > > > Otis > > > > > > > > > > ________________________________________________ > > > Get your own "800" number > > > Voicemail, fax, email, and a lot more > > > http://www.ureach.com/reg/tag > > > > > > > --------------------------------------------------------------------- > > > To unsubscribe, e-mail: > [EMAIL PROTECTED] > > > For additional commands, e-mail: > [EMAIL PROTECTED] > > > > > > > > > > ________________________________________________ > Get your own "800" number > Voicemail, fax, email, and a lot more > http://www.ureach.com/reg/tag > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
