I'm trying to create a page where some content will be displayed after ajax request. Here is part of my code:
<h:panelGroup>
<h:form>
Retrive object by id: <h:inputText id="myInput" value="#{myManager.id}"/>
<h:commandButton value="ok" action="#{myManager.getById}" >
<f:ajax execute="myInput" render="resultRow" />
</h:commandButton>
<h:panelGroup id="resultRow" >
<br />
You retrived object which id is:
<h:outputText value="#{retrivedObject.id}" />
and its name is:
<h:outputText value="#{retrivedObject.name}" />
</h:panelGroup>
</h:form>
</h:panelGroup>
My problem is taht the "You retrived object which id is: " is rendered even before I retrive any object. I want it to be hidden until I click my command button. Is it possible to do only with jsf + html (this have to be done with ajax)? I could use some javascript if I will have to, but I prefer not.
I tried to solve this by rendered="#{!retrivedObject.id==0}" (my object can't have id 0), but this doesn't work - panel group isn't rendered at all and when I call ajax reqest it is unable to find "resultRow" id.
Thanks for help in advance.
It may not be exactly what you are looking for but you can always wrap the panelGroup in a div and set the div visibility to hidden, then use javascript to change the visibility when you click the command button.
You can use the rendered attribute like this :
<h:panelGroup>
<h:form>
Retrive object by id: <h:inputText id="myInput" value="#{myManager.id}"/>
<h:commandButton value="ok" action="#{myManager.getById}" >
<f:ajax execute="myInput" render="resultRow" />
</h:commandButton>
<h:panelGroup id="resultRow">
<h:panelGroup rendered="#{retrivedObject ne null}">
<br />
You retrived object which id is:
<h:outputText value="#{retrivedObject.id}" />
and its name is:
<h:outputText value="#{retrivedObject.name}" />
</h:panelGroup>
</h:panelGroup>
</h:form>
</h:panelGroup>
Related
I have a jsf page with
<h:inputText required="true"> attribute.
When I click on my add button, I want to see an error if the field is blank.
I have a <f:message> to display this.
But how can I escape (cancel) the page with that field blank? In my case it continually posts the error message and I have to enter something in the field to go to another page.
If your cancel button is a POST requests e.g. <p:commandButton>,<h:commandButton>, <p:commandLink>, or <h:commandLink>
You can put your cancel button outside the form that has the <h:inputText> so that form is not submitted
<h:form>
<h:inputText value="#{bean.string}" required="true"/>
</h:form>
<h:form>
<p:commandButton value="Cancel" action="anotherpage.xhtml"/>
</h:form>
If you are navigating without any actions or method invocation, then you can use GET requests e.g. <h:button>, <p:button>, <h:link> or <h:outputLink>.
Example:
<h:form>
<h:inputText value="#{bean.string}" required="true"/>
<p:button value="Cancel" outcome="anotherpage.xhtml"/>
</h:form>
You can use immediate="true" in your <p:commandButton>. Then it will skip the validation.
For example:
<p:commandButton action="#{managedBean.action}" value="Cancel" immediate="true" />
Just don't process the form on submit if you want to cancel or navigate away.
I.e. don't do
<h:form>
...
<p:commandButton value="Cancel" action="#{bean.cancel}" />
</h:form>
But just do
<h:form>
...
<p:commandButton value="Cancel" action="#{bean.cancel}" process="#this" />
</h:form>
Or, better if you're only returning a navigation outcome in cancel() method anyway
<h:form>
...
<p:button value="Cancel" outcome="otherpage.xhtml" />
</h:form>
In my JSF page I have form when I click submit button in the same page I need to show an static content. But When I click <p:commandbutton> nothing appears in the page. When I put ajax="false" then only action taken place but the Static content display in new page.
In my Backing bean I have used Session scoped. I am using JSF 2.0 and Primefaces 3.2.
My JSF Page.
<h:form>
<h:panelGroup rendered="#{not license.showForm}">
<p:panel header="License Key Request" >
<h:panelGrid columns="2" >
..
<h:outputText value="Bla bla"/>
..
<h:outputText value="Bla Bla" />
</h:panelGrid>
<TABLE>
..
<h:outputLabel for="name" value="Requestor Name : *" />
..
<p:inputText id="name" value="#{license.name}" required="true" requiredMessage="Name is required."/>
..
<h:outputLabel for="company" value="Company : * " />
..
<p:inputText id="company" value="#{license.company}" required="true" requiredMessage="Company is required."/>
..
</table>
<p:commandButton value="Form" id="btnAdd" process="#form"
action="#{license.add}" />
..
</table>
</p:panel>
</h:panelGroup>
<h:panelGroup rendered="#{license.showForm}" >
<h:outputText value="Bla Bla"/>
</h:panelGroup>
</h:form>
Your source code is somewhat confusing (e.g. you have two closing table tags). But I assume that you want to show the panelGroup at the bottom if the button is clicked.
The easiest way would be to add an update ="#form" to your commandButton:
<p:commandButton value="Form" id="btnAdd"
process="#form" update="#form"
action="#{license.add}" />
You don't need to update the whole form but only the specific component. Then you need to give the panelGroup an id attribute and use this attribute instead of #form. However, since it is not clear for me how your naming containers are organized, it could be puzzling to find the correct relative id.
i'm trying to use an search button which brings back the selected items (can be more than one) and it updates the datatable. Then i have a selectBooleanCheckbox next to each colomn, when user selects "n" items then presses the Select the checked Items it insert DB.
The code can be seen below:
<h:panelGrid columns="5">
<h:form>
<h:outputText value="Item Name"/>
<p:inputText value="#{StockController.itemName}"/>
<h:commandButton value="Search" action="#{StockController.Search}">
<f:ajax execute="#form" render=":results"/>
</h:commandButton>
</h:form>
//The code sample below belongs to BalusC see the post here
<h:panelGroup id="results">
<h:form>
<h:dataTable value="#{bean.entities}" var="entity">
<h:column>
<h:selectBooleanCheckbox value="#{bean.checked[entity.id]}" />
</h:column>
...
</h:dataTable>
<h:commandButton value="Select the checked Items" action="#{StockController.insertDao}" >
<f:ajax execute="#form" render=":results"/>
</h:commandButton>
</h:form>
</h:panelGrid>
Now, i have read many blogs and Core javaServer Faces 3, i don't think there is logical error in ajax usage. I tested by removing each ajax then both works fine but whenever i try to use both of cummondButtons with ajax, the second one "Select the checked Items" does not even call the "StockController.insertDao" method.
Any help is appreciated.
Thanks all.
When you want to ajax-render content which in turn contains another form, then you need to include the ID of that form in the render attribute as well, otherwise the other form will lose its view state and nothing will be processed on submit.
<h:form>
...
<h:commandButton value="Search" action="#{StockController.Search}">
<f:ajax execute="#form" render=":results :resultsForm" />
</h:commandButton>
</h:form>
<h:panelGroup id="results">
<h:form id="resultsForm">
...
</h:form>
</h:panelGroup>
If there's however nothing which goes outside <h:form> inside the same <h:panelGroup>, then you can just omit the <h:panelGroup> altogether and re-render the form directly.
<h:form>
...
<h:commandButton value="Search" action="#{StockController.Search}">
<f:ajax execute="#form" render=":results" />
</h:commandButton>
</h:form>
<h:form id="results">
...
</h:form>
This is related to JSF spec issue 790.
See also:
Communication in JSF2 - Ajax rendering of content which contains another form
I am building an invoice application. When the user selects the client, then the services associated with the client are re-rendered in a dataTable by an ajax event. But, the ajax event of the selectOneMenu in the dataTable does not fire.
This is the form which lets the user select a client:
<h:form>
<h:selectOneMenu id="clientSelect" value="#{invoiceBean.client}">
<f:ajax execute="clientSelect" listener="#{invoiceServiceListener.processClientValueChange}" render=":test :invoiceData"/>
<f:selectItems value="#{invoiceBean.clientOptions}"/>
</h:selectOneMenu>
</h:form>
This will fire an ajax event which fills the services array in the invoiceBean and re-renders the dataTable which displays the services in another selectOneMenu in the dataTable. This part works properly.
This is the datatable that is re-rendered after selecting the client by the above form:
<h:panelGroup id="test">
<h:dataTable id="invoiceData" value="#{attributes.priceAttributes}" var="loop">
<h:column>
<ui:param name="service" value="service#{loop}" />
<ui:param name="description" value="description#{loop}" />
<ui:param name="price" value="price#{loop}" />
<h:form id="invoiceSelectMenu">
<h:selectOneMenu id="selectMenu" value="#{invoiceBean[service]}">
<f:ajax event="change" execute="selectMenu" listener="#{invoiceServiceListener.procesServiceValueChange}" render="#form" />
<f:attribute name="row" value="#{loop}" />
<f:selectItems value="#{invoiceBean.services}" />
</h:selectOneMenu>
<h:inputText id="description" value="#{invoiceBean[description]}" />
<h:inputText id="price" value="#{invoiceBean[price]}" />
<h:outputText value="#{loop}" />
</h:form>
</h:column>
</h:dataTable>
</h:panelGroup>
The selectOneMenu is filled properly. However, the ajax event in this select one menu does not work after it has been re-rendered by the first form. But, if I manually fill the services array without submitting the first form, then this ajax event executes normally. By the way, this ajax event also sets a value to the description and price input fields, which should be re-rendered when the event happens. The invoiceBean is request scoped.
This is going to be tricky. Due to JSF spec issue 790, whenever you re-render some content containing another <h:form> using <f:ajax>, then its view state will get lost. To solve this, you'd basically need to reference the full client ID of another <h:form> inside <f:ajax> instead of some containing component. But you've basically multiple forms inside a <h:dataTable> which can't be referenced by an absolute client ID.
You'd need to rearrange the code to put the <h:form> outside the <h:dataTable> and change the <f:ajax> to execute only the necessary components.
<h:form id="invoiceDataForm">
<h:dataTable id="invoiceData" value="#{attributes.priceAttributes}" var="loop">
<h:column>
<ui:param name="service" value="service#{loop}" />
<ui:param name="description" value="description#{loop}" />
<ui:param name="price" value="price#{loop}" />
<h:selectOneMenu id="selectMenu" value="#{invoiceBean[service]}">
<f:ajax execute="selectMenu,description,price" listener="#{invoiceServiceListener.procesServiceValueChange}" render="#form" />
<f:attribute name="row" value="#{loop}" />
<f:selectItems value="#{invoiceBean.services}" />
</h:selectOneMenu>
<h:inputText id="description" value="#{invoiceBean[description]}" />
<h:inputText id="price" value="#{invoiceBean[price]}" />
<h:outputText value="#{loop}" />
</h:column>
</h:dataTable>
</h:panelGroup>
and then reference it form the first form as follows:
<f:ajax execute="clientSelect" listener="#{invoiceServiceListener.processClientValueChange}" render=":invoiceDataForm" />
Note that some component libraries such as PrimeFaces have already workarounded/solved this in the component library specific ajax engine. So if it might happen that you're already using PrimeFaces, you could also replace <f:ajax> of the first form by <p:ajax>.
Unrelated to the concrete problem, the <f:attribute name="row" value="#{loop}" /> may not do what you expect it does. It will set null because <f:xxx> tags run during view build time, not during view render time tag. The #{loop} is not available during view build time. But that's subject for a different question :)
I have
<h:form>
<h:commandLink action="#{my_fake_ajax_link}">
<h:outputText value="Link" />
<f:ajax render=":mydiv" />
</h:commandLink>
</h:form>
<h:panelGroup layout="block" id="mydiv">
<h:form>
<h:commandLink action="#{mybean.delete(0)}">
<h:outputText value="Here" />
<f:ajax render="#form" />
</h:commandLink>
</h:form>
</h:panelGroup>
When I click once on "my_fake_ajax_link", then I have to click twice on "delete" link. This is only an example. I don't have this real case. I have multiple forms on a page and I can't just add all of them in a single form.
I checked what the problem is and it is:
When you click on "my_fake_ajax_link", the mydiv refreshs with ajax as it should.
ViewState of the refreshed form on ajax is missing.
How can I add the ViewState? How can I make it work without using only one form? This looks like an JSF bug to me. I don't want to refresh that div automatically with
jQuery("#mydiv").load(document.location.href);
but I will in my worst case possible.
This is a known problem in the auto-included jsf.js library of JSF which handles ajax responses. See also JSF spec issue 790 which is fixed in the upcoming JSF 2.3. In the meanwhile, with JSF 2.0/2.1/2.2, you have to explicitly specify the ID of the other <h:form> inside the render attribtue to trigger proper addition of the view state.
<h:form>
<h:commandLink action="#{my_fake_ajax_link}">
<h:outputText value="Link" />
<f:ajax render=":mydiv :mydivForm" />
</h:commandLink>
</h:form>
<h:panelGroup layout="block" id="mydiv">
<h:form id="mydivForm">
<h:commandLink action="#{mybean.delete(0)}">
<h:outputText value="Here" />
<f:ajax render="#form" />
</h:commandLink>
</h:form>
</h:panelGroup>
No, this does not cause any overhead or markup duplication in the ajax response. Alternatively, use OmniFaces fixviewstate.js.
See also:
Communication in JSF 2.0 - Ajax rendering of content which contains another form
h:commandButton/h:commandLink does not work on first click, works only on second click
Workaround for that:
First you need to set an onevent handler for the button that sends the ajax request:
<h:form id="newComment">
<h:commandButton id="saveNewComment" action="#{postBean.actionSaveNewCommentAjax}" value="#{rb['speichern']}">
<f:ajax execute="#form" render=":commentsBox" onevent="function(data) { fixOtherFormsViewState(data, 'newComment') }" />
</h:commandButton>
</h:form>
Then you need to declare this javascript methods that will take the correct viewState value and add it to all forms which doesn't have it:
<h:outputScript>
function fixOtherFormsViewState(data, goodFormId) {
if (data.status != "success") {
return;
}
var viewState = jQuery("#" + goodFormId + " input[name='javax.faces.ViewState']").val();
jQuery("form:not(:contains(input[name='javax.faces.ViewState']))").each(function (idx, elem) {
var form = jQuery(elem);
var input = jQuery("<input type='hidden' name='javax.faces.ViewState' />").val(viewState);
form.append(input);
});
}
</h:outputScript>