Or, to put this another way, I don't think that debugging MyFaces is going to help you find the error. While it's possible that there's some subtle edge case in MyFaces causing this error, I think the first thing to check is that the expected submitted form value pairs in the html generated match the actual submitted form value pairs in the generated html once it is submitted. That's why the general causes of this error are things that happen after JSF generates the page but before JSF processes the results of submitting the page -- javascript-induced changes, ajax-induced changes, cache-induced changes, etc.
On 6/8/07, Mike Kienenberger <[EMAIL PROTECTED]> wrote:
Assuming that the error points to a component with id "myTextArea", you should have generated html (use view source before you hit the submit button) that has something along these lines: <textarea name="myForm:myTextArea" id="myForm:myTextArea" rows="5"> If so, then you need to figure out why there's no submitted value when you submit the form -- perhaps submitting the form through some kind of proxy which logs all of the values would help. If there's no such element, then you need to figure out why the element wasn't rendered. On 6/8/07, Shane Petroff <[EMAIL PROTECTED]> wrote: > Mike Kienenberger wrote: > > Set a breakpoint on the line generating the error. > > Your first step is to determine which component value is missing from > > your form submit. > According to the warning message, I can see that there are several text > area components which are the problem (I assign the id's myself, so it > is easy to verify which components it is complaining about). Most of the > components in this page are generated in java code, and everything looks > fine inside the factory method responsible for creating the text > components (isDisabled()==false and isRendered()==true). Visually, > immediately preceding an attempt to navigate away from this page via > CommandLink, the fields in question are rendered and enabled. After > that, I can see my request scoped backing bean get created once the link > is clicked, but then the warnings are thrown and no navigation takes > place. In terms of the generated html, it is a monsterous form with > scads of disabled components, so it is not terribly easy to verify > anything (my javascript skills suck as well, and that doesn't help). > However, everything which gets disabled is set inside the java code > which generates all of the content for the main panel so there ought not > to be any issues with client side disables. > > > Once you know that, look at the generated html before the submit and > > see if you can determine why the input for that component didn't > > submit a value. > OK, what do I look for? I know the component id a priori, so I can > isolate the 3 times which it occurs in the generated html. Once for the > component name, once for the id, and once in some javascript tied to a > sepeate button which does a spell check on the component in question > (fwiw, the spell check function does not alter either the rendered or > disabled state of the component and this issue crops up regardless of > whether or not the spell check function is actually invoked) > > I don't see anything in the html which suggests a problem, but I'm not > altogether sure what to look for. > > Shane > > > > > On 6/8/07, Shane Petroff <[EMAIL PROTECTED]> wrote: > >> Thanks for the suggestions, > >> > >> In reviewing the potential problems you listed below, I'm still stuck. I > >> don't use ajax, so 1) shouldn't be an issue. I don't disable anything in > >> javascript, so 2) shouldn't affect me. I only use a single form with > >> everything inside it, so 3) shouldn't be an issue either. And I don't > >> tie any EL to the disabled/rendered properties (only the value is > >> mutated via EL expression). > >> > >> What do you think would be the best way to diagnose what is going wrong? > >> I guess I could attach a PhaseListener and set a breakpoint in there to > >> try to dissect what JSF thinks is wrong. I'm at a real loss here since I > >> can't see anything wrong and the components which are causing the > >> problem are used to capture the most important data I deal with. Thanks > >> for the help > >> > >> Shane > >> > >> > >> Andrew Robinson wrote: > >> > That error occurs if there is no submitted value (I know - obvious > >> > statement). Several things can cause it though. Here are the ones that > >> > are most common IMO (P -> problem, S->Work-around/Solution) > >> > > >> > 1) (P) A4J and the ajaxSingle attribute set to true. (S) Use > >> > a4j:region around any component with ajaxSingle set to true to make > >> > sure only that component is decoded and updated > >> > > >> > 2) (P) Element is removed from the client DOM or is disabled *and* the > >> > JSF component is not disabled. (S) The client side enabled/rendered > >> > should map to the server-side enabled/rendered. Therefore, if you are > >> > disabling/removing components on the client, you need to make sure you > >> > change the value on the server *before* the apply request values phase > >> > (I think that is the correct phase of the error). > >> > > >> > 3) (P) Component is not inside of the form that was submitted. (S1) Do > >> > not use multiple forms if doing so, instead use the subForm component > >> > in the sandbox with one form or use one or multiple forms with > >> > a4j:region if using A4J. (S2) make sure all components that implement > >> > EditableValueHolder are placed inside of a UIForm component. > >> > > >> > 4) (P) The EL expression tied to the rendered or disabled property of > >> > the component is not view specific and has been changed by another > >> > view or is changed before the apply request values phase. (S) Make > >> > sure the rendered and/or disabled properties of components do not > >> > change after rendering and before the apply request values. > >> > > >> > -Andrew > >> > > >> > On 6/5/07, Shane Petroff <[EMAIL PROTECTED]> wrote: > >> >> Mike Kienenberger wrote: > >> >> > I've also had it happen if the page changes and the facelets > >> component > >> >> > tree (or jsp page) is still cached somewhere. > >> >> I'm almost completely certain it is not a caching issue (although it > >> >> would be good to know if one could configure Tomcat not to cache > >> >> anything, ever...) I've hand nuked caches several times and tried > >> >> executing on a different machine (Tomcat running on the localhost in > >> >> both cases). > >> >> > >> >> Shane > >> >> > Same idea -- the > >> >> > expected submitted page elements do not match the actual submitted > >> >> > page elements. > >> >> > > >> >> > On 6/5/07, Shane Petroff <[EMAIL PROTECTED]> wrote: > >> >> >> > >> >> >> I am having some strange navigation problems (once again...) > >> and the > >> >> >> only clue I have is the warning below. > >> >> >> > >> >> >> HtmlRendererUtils - There should always be a submitted value > >> for an > >> >> >> input if it is rendered, its form is submitted, and it is not > >> >> disabled > >> >> >> or read-only. > >> >> >> > >> >> >> In Googling the error message, it seems that the problem should be > >> >> >> related to using Javascript to disable a control which my-faces > >> >> expects > >> >> >> to get a value from. The warning goes on to name the component in > >> >> >> question, but there isn't any Javascript which touches these text > >> >> areas, > >> >> >> in fact there isn't any Javascript which disables anything. The > >> >> >> components which are (in theory) causing the warning are certainly > >> >> not > >> >> >> disabled visually and for the most part they all contain text. > >> >> They also > >> >> >> happen to be created in Java code, so there is no jsp to post > >> here. > >> >> >> > >> >> >> Can anyone give me a more detailed interpretation of what the > >> warning > >> >> >> means and when it arises? > >> >> >> > >> >> >> -- > >> >> >> Shane > >> >> >> > >> >> >> > >> >> > > >> >> > >> >> > >> >> -- > >> >> Shane > >> >> > >> >> > >> > > >> > >> > >> -- > >> Shane > >> > >> > > > > > -- > Shane > >
