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Number of <h:form > tags on a page

Scott Stephens

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posted 12 years ago

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I am having a problem that only one of the <h:commandButton> tags fire when I have two <h:form> tags on the page. Is it allowed to have more than one <h:form> tag on the page. The Html from two forms is rendered, however the action="backing bean" isn't fired. I could use some help here.
Using JSF 2.0 with MyFaces and hibernate 3.2

<?xml version="1.0" encoding="ISO-8859-1" ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
	xmlns:h="http://java.sun.com/jsf/html"
	xmlns:f="http://java.sun.com/jsf/core"
	xmlns:t="http://myfaces.apache.org/tomahawk"
	xmlns:ui="http://java.sun.com/jsf/facelets">

<h:head></h:head>
<h:body>
	<h:outputStylesheet library="css" name="styles.css" target="head" />
	<ui:composition template="/template.xhtml">
		<ui:define name="header">
			Administration
		</ui:define>

<ui:define name="navigation">
			<h:form>
				<t:panelNavigation id="nav" styleClass="navigation"
					separatorClass="navseparator" itemClass="navitem"
					activeItemClass="navitem_active" openItemClass="navitem_open">

<t:commandNavigation id="nav_1" value="logout" action="LOGOUT" />
				</t:panelNavigation>
			</h:form>
		</ui:define>

<ui:define name="content">
			<h:panelGrid columns="2" border="0">
				<f:facet name="header">
					<h:outputText value="Personal(aktiv)" />
				</f:facet>
				<h:form>
					<h:dataTable value="#{sdHandler.sdList}" var="p"
						rowClasses="list-row-even,list-row-odd"
						binding="#{sdHandler.sdDataTable}">

<h:column>
							
							<f:facet name="header">
								<h:outputText value="Name"></h:outputText>
							</f:facet>
							
 					#{p.name}
 					</h:column>
						<h:column>
							
							<f:facet name="header">
								<h:outputText value="Vorname"></h:outputText>
							</f:facet>
							
 					#{p.vorname}
 					</h:column>
						<h:column>
							
							<f:facet name="header">
								<h:outputText value="Strasse"></h:outputText>
							</f:facet>
							
 					#{p.strasse}
 					</h:column>
						<h:column>
							<h:commandButton styleClass="calNavBtn" value="Edit"
								action="#{sdHandler.editStammdaten}" />
						</h:column>
					</h:dataTable>
				</h:form>

<h:panelGroup>
					<h:form>
						<h:panelGrid columns="3">
					
					ID: <h:inputText value="#{sdHandler.sd.id}" readonly="true" />
							<h:inputHidden></h:inputHidden>
					Name: <h:inputText id="name" value="#{sdHandler.sd.name}"
								required="true" />
							<h:message for="name"></h:message>
							 
					Vorname: <h:inputText id="vorname" value="#{sdHandler.sd.vorname}"
								required="true" />
							<h:message for="vorname"></h:message>
							 
					Geburtsdatum: <t:inputDate id="gbdat" type="date"
								popupCalendar="false" value="#{sdHandler.sd.gebDat}"
								required="false" />
							<h:inputHidden></h:inputHidden>
							 
					Telefon: <h:inputText value="#{sdHandler.sd.telefon}" />
							<h:inputHidden></h:inputHidden>
							 
					Strasse: <h:inputText value="#{sdHandler.sd.strasse}" />
							<h:inputHidden></h:inputHidden>
							 
					PLZ: <h:inputText value="#{sdHandler.sd.plz}" />
							<h:inputHidden></h:inputHidden>
					Ort: <h:inputText value="#{sdHandler.sd.ort}" />
							<h:inputHidden></h:inputHidden>
					Urlaubstage: <h:inputText value="#{sdHandler.sd.urlaubstage}" />
							<h:inputHidden></h:inputHidden>
							<h:commandButton id="sendSD" value="Speichern"
								action="#{sdHandler.setStammdaten}" />

</h:panelGrid>
					</h:form>
				</h:panelGroup>

</h:panelGrid>
		</ui:define>
	</ui:composition>
</h:body>
</html>

Tim Holloway

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Posts: 28667

211

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posted 12 years ago

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You can have as many h:form elements on a page as you can endure. I do this all the time.

The rules are the same as for straight HTML forms:

1. FORMs cannot be nested nor can they overlap.

2. ONLY the data in the form that contains the SUBMIT button (or other control) that fired off the request will be posted back to the server.

And for JSF:

3. If ANY control value on the submitted form fails validation, NONE of the backing bean properties will get updated AND the action method and/or listeners will not be fired. When in doubt, add an h:messages tag to your page to display any possible "validation failed" messages.

Experience keeps a dear School, but Fools will learn in no other.
---
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