6 Replies Latest reply on Oct 6, 2008 11:23 AM by holger_p

a4j:repeat reRender question

holger_p Oct 6, 2008 5:22 AM

Hello,

I have a dynamically list of h:inputText components.When i reRender
the list , any inputs made by the user which are not saved to the model will be lost.

If i perform the same operation on a single field , it wil keep its value
after reRender(even when its not saved to the model - the desired behaviour i need) pls look at the following code

 <h:form id="updateForm">
 <a4j:outputPanel id="updatePanel">
 <h:messages />

 <div>
 <!-- will keep the input made by the user after reRender -->
 <h:inputText>
 <f:validateLength minimum="3" />
 </h:inputText>
 </div>
 <a4j:commandLink value="Add Input(no value in backend)" immediate="true" reRender="updatePanel" action="#{testBean.addInput}">
 </a4j:commandLink>

 <table>
 <a4j:repeat id="inputRepeat" var="testEntry" value="#{testBean.testEntries}">
 <tr>
 <td>
 <!-- will loose the input made by the user after reRender -->
 <h:inputText>
 <f:validateLength minimum="3" />
 </h:inputText>
 </td>
 <td>
 <h:message for="working" />
 </td>
 <td>
 <a4j:commandLink value="Add Input(no value in backend)" immediate="true" reRender="updatePanel" action="#{testBean.addInput}">
 </a4j:commandLink>
 </td>
 </tr>
 </a4j:repeat>
 </table>
 </a4j:outputPanel>
 </h:form>

What is the reason for this and how to get around this?
(when i use c:forEach it shows the desired behaviour - but in this case i get duplicated id problems so id like to use a4j:repeat)

Thx very much,
Holger

1. Re: a4j:repeat reRender question

ilya_shaikovsky Oct 6, 2008 6:59 AM (in response to holger_p)

immediate should be false.
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2. Re: a4j:repeat reRender question

holger_p Oct 6, 2008 7:23 AM (in response to holger_p)

Hello ilya,

Ok what i forget to mention, i need to skip validation that why immediate have to be set to true if i understand this right.

Well what i need to do is:

1) generate a list of h:inputText
2) performan an ajax action which add an input field to that list
on this action - validation needs to be skipped
3) reRender the list - all user inputs on the h:inputText have to be saved

As i already wrote if i use c:forEach i can archieve this goal, but i need to use a4j:repeat to avoid duplicate id problems

Is this with a4j:repeat possible?
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3. Re: a4j:repeat reRender question

ilya_shaikovsky Oct 6, 2008 7:44 AM (in response to holger_p)

I repeat. With immediate set to true not only validation but apply also will be skipped. So you can't wait that your inputs will be saved. And there is nothing about RF . Just standard JSF behavior.

Use ajax Single and concrete cells reRender as it shown at repeat richfaces-demo page in order not to reRender not saved inputs.
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4. Re: a4j:repeat reRender question

holger_p Oct 6, 2008 7:57 AM (in response to holger_p)

I repeat. With immediate set to true not only validation but apply also will be skipped. So you can't wait that your inputs will be saved.

Ok, well i understand this BUT why is this working- it shows that the user inputs are saved on the InputField(not on Bean).
As u can see in the code the h:inputText has no value property.

 <c:forEach id="inputRepeat" var="testEntry" items="#{testBean.testEntries}">
 <tr>
 <td>
 <!-- will NOT loose the input made by the user after reRender -->
 <h:inputText>
 <f:validateLength minimum="3" />
 </h:inputText>
 </td>
 <td>
 <h:message for="working" />
 </td>
 <td>
 <a4j:commandLink value="Add Input(no value in backend)" immediate="true" reRender="updatePanel" action="#{testBean.addInput}">
 </a4j:commandLink>
 </td>
 </tr>
 </c:forEach>

andf this will not

 <a4j:repeat id="inputRepeat" var="testEntry" value="#{testBean.testEntries}">
 <tr>
 <td>
 <!-- will loose the input made by the user after reRender -->
 <h:inputText>
 <f:validateLength minimum="3" />
 </h:inputText>
 </td>
 <td>
 <h:message for="working" />
 </td>
 <td>
 <a4j:commandLink value="Add Input(no value in backend)" immediate="true" reRender="updatePanel" action="#{testBean.addInput}">
 </a4j:commandLink>
 </td>
 </tr>
 </a4j:repeat>

Thats what i need understand and then get it to work for a4j:repeat.
I guess it has something to do with state saving but i am not that jsf expert.
Well i cant explain it better :-/

Hope you can help me - if not - well my problem.
Thx very much,

Holger

5. Re: a4j:repeat reRender question

holger_p Oct 6, 2008 8:05 AM (in response to holger_p)

ajax Single and concrete cells reRender as it shown at repeat richfaces-demo page in order not to reRender not saved inputs.

That a good idea i tried that long time ago(have another posting on this), the problem is that with ajaxKeys u can only reRender existing! rows , but my add action addds a new row which cant be reRender becourse it dont exists.
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6. Re: a4j:repeat reRender question

holger_p Oct 6, 2008 11:23 AM (in response to holger_p)

Hi, its me again,
can i have a short statement on my last 2 posts? (if u dont understand what i wrote or what i wanted to ask pls tell me)

Thx very much,
Holger
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