p:messages working, p:message isn't.

[Alan]

Using 3.0.3.M3 here. I think I hit some obvious error but I can't see what it is. I have a little form like this:

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<h2>Create New Category</h2>
                    <h:form id="mqCreateForm">
                        <h:panelGrid cellspacing="4" columns="3">

                            <h:outputLabel value="Category Name:" />
                            <p:inputText id="mqCat" size="30" 
                                         value="#{maintCategory.newCategory.name}"
                                         />
                            <p:message for="mqCat"  />
                            
                            <h:outputLabel value="Count:" />
                            <h:outputText  value="#{maintCategory.count}" />

                        </h:panelGrid>
                        <p:commandButton value="Create New Category"
                                         actionListener="#{maintCategory.doNewCategory}" 
                                         update=":mqCreateForm :mqForm:mqDataTable" />
                        <br/>
                        <p:messages />
                    </h:form>

When I hit the button, the following code executes in the bean, submitted via AJAX:

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        FacesContext fc = FacesContext.getCurrentInstance();
        FacesMessage fm = null;
        
        String s = newCategory.getName();
        if (s == null || s.isEmpty()) {
            fm = new FacesMessage(FacesMessage.SEVERITY_ERROR, "Not Created", 
                    "Category Name May Not Be Empty");
            fc.addMessage("mqCat", fm);
        }
        
        // if an error occured, just return
        
        if (fm != null) return null;

The update attribute on the commandButton seems to be working just fine. Also, the summary message appears where the p:messages tag is, but nothing ever appears where the p:message tag is.

The showcase example doesn't show this pattern -- where an fc.addMessage(clientID .. case is used. Is this supposed to work or am I doing something wrong? This seems like a textbook example.

[kukeltje]

It's a textbook example with a textbook error (I suspect). Form is a naming container, so the its id is prepended to the id's of all its children. So you need to add it to the 'for' in the p:message and in the java code

[Alan]

Ok, then. That did turn out to be the right path.

I changed the facelet to:

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 <p:message for="mqCreateForm:mqCat"  />

and the backing bean now has:

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fc.addMessage("mqCreateForm:mqCat", fm);

and that works.

Did PF change its behavior on this in some recent version? I am using 3.0.M3 now, but I could swear that on an earlier version I had facelet/backing bean pairs that did not need the clientID form (with the form ID prepended). If it changed, is this the way that it is going to stay?

One other thought: are the rules different in the case of a partial submission versus a full page submission?

[kukeltje]

I am using 3.0.M3 now, but I could swear that on an earlier version I had facelet/backing bean pairs that did not need the clientID form (with the form ID prepended)

Has nothing to do with PF, but that you had a version of your app that did not need this could very well be the case, since the textbooks also show that h:form has something called 'prependId' which is a boolean attribute. Guess what is does when set to false (Searching a little on google might have given this answer and on the initial one )

[cagatay.civici]

This is how JSF works and we followed the same when implementing the p:message component and haven't changed/extended anything since then.