I have this code above which works perfectly when i select some of the items on him... The a4j:support works fine and rerender my another field correctly...
The problem is if i choose one item, and then i back to "noSelectionLabel"...
When i do this for some reason my a4j:support dont work, i dont get into my method "setarFormulario" and i dont rerender my another field...
<s:decorate template="layout/form.xhtml">
<ui:define name="label">Evento:</ui:define>
<h:selectOneMenu value="#{home.instance.evento}" required="true">
<s:selectItems value="#{eventoService.obterTodos()}" var="evento" label="#{messages[evento.nome]}" noSelectionLabel="#{messages['br.com.message.NoSelection']}" />
<s:convertEntity />
<a4j:support event="onchange" action="#{home.setarFormulario}" reRender="camposFormulario" ajaxSingle="true" />
</h:selectOneMenu>
</s:decorate>
How can i get into my method even if i select the noSelectionLabel? Then my home.instance.evento must be null.. or something like this...
Yor field h:selectOneMenu is required then selecting noSelectionLabel value will cause a validation error and if you had validation error, then the action="#{home.setarFormulario}" would never be called.
As a workaround you can set to true the attribute hideNoSelectionLabel for your s:selectItems then the noSelectionLabel will be hidden when a value is selected
<h:message for="id of the selectonemenu component " ></h:message>
or
remove the required =true from the selectonemenu tag
Related
I have a form which contains a dropdown and two input fields.
<h:selectOneMenu />
<h:inputText />
<h:inputText />
I would like to make the required attribute of the input fields conditional depending on the selected value of the dropdown. If the user chooses the first item of the dropdown, then the input fields must be required. If the user chooses the second item, then those would not be required.
How can I achieve this?
Just bind the dropdown to the view and directly check its value in the required attribute.
<h:selectOneMenu binding="#{menu}" value="#{bean.item}">
<f:selectItem itemValue="first" itemLabel="First item" />
<f:selectItem itemValue="second" itemLabel="Second item" />
</h:selectOneMenu>
<h:inputText value="#{bean.input1}" required="#{menu.value eq 'first'}" />
<h:inputText value="#{bean.input2}" required="#{menu.value eq 'first'}" />
Note that the binding example is as-is. Do absolutely not set it to a bean property here. See also How does the 'binding' attribute work in JSF? When and how should it be used?
Also note that the ordering of the components is significant. If the menu is located below the inputs in the tree, use #{menu.submittedValue eq 'first'} instead. Or if you want to be independent from that, use #{param[menu.clientId] eq 'first'} instead.
Assuming you are using JSF 2.0: Let your SelectOneListBox execute with ajax and re-render the input fields on change of the list box:
A quick sketch:
<h:selectOneMenu value="#{myBean.myMenuValue}">
<f:ajax render="input1"/>
..
</h:selectOneMenu>
<h:inputText id="input1" value="#{myBean.myInputValue}"
required="#{myBean.myMenuValue == 'firstEntry'}" />
I´ve managed to get the code to do what I intended, but I do not understand a particular aspect of why this works. I´m running Seam 2.2.2 with Richfaces 3.3.3.
Here is the code from the xhtml page:
...
<h:form id="radiobuttontestform">
<fieldset>
<h:panelGrid columns="3">
<h:selectOneRadio layout="pageDirection" id="myRadio" value="#{actionBean.myRadioButton}">
<f:selectItem itemLabel="First" itemValue="0" />
<f:selectItem itemLabel="Second" itemValue="1" />
<a4j:support event="onclick" ajaxSingle="true" process="myDropdown" reRender="myDropdown,myCount,test" />
</h:selectOneRadio>
<h:panelGrid columns="1" border="0">
<h:selectOneListbox size="1" id="myDropdown" value="#{actionBean.rowCountPredefined}" disabled="#{actionBean.myRadioButton != '0'}">
<f:selectItem itemLabel="10" itemValue="10" />
<f:selectItem itemLabel="20" itemValue="20" />
<f:selectItem itemLabel="30" itemValue="30" />
</h:selectOneListbox>
<h:inputText id="myCount" maxlength="5" value="#{actionBean.rowCountSpecified}" disabled="#{actionBean.myRadioButton != '1'}" required="true">
<f:validateLongRange minimum="1" maximum="1000" />
<rich:ajaxValidator event="onkeyup" for="myCount" />
</h:inputText>
<rich:message id="errorMessage" for="myCount" ajaxRendered="true" showDetail="false" showSummary="true">
<f:facet name="errorMarker">ERROR:</f:facet>
</rich:message>
</h:panelGrid>
</h:panelGrid>
</fieldset>
<h:outputLabel id="test" value="RadioValue: #{actionBean.myRadioButton}" />
<a4j:commandButton id="show" value="Show Values in Log" action="#{actionBean.showValues}" />
<a4j:commandButton id="done" value="Save and end conversation" action="#{actionBean.apply}" />
</h:form>
...
The backing bean is just a simple POJO with getters and setters for the three properties here. (myRadioButton, rowCountPredefined, rowCountSpecified)
This is what I get: (the correct result)
radio button example http://katzekat.de/Bilder/radio2.png
radio button example http://katzekat.de/Bilder/radio.png
Here is my thinking:
Setting ajaxSingle to true means that only the radio button will be processed on the server. The dropdown next to it doesn´t need validation - it will always contain a correct value. I´ve added the process="myDropdown" in order to persist the value into the backing bean, otherwise when I switch the radio button to position 2 the dropdown reverts to its original value. (I realise this is only cosmetic!) I´ve checked this with a debugger and it does indeed set the property in the backing bean and everything is working as expected.
Once the radio button is switched into position 2 a value can be entered in the textbox and will be validated. This works perfectly, and when I switch the radio button back to position 1, the validation error is cleared if this field is in an error state. Presumably because the error message is only present in the request scope.
Firing up the debugger again when the radio button is in position 2 and entering a valid value in the text field reveals no update on the backing bean when switching back to position 1. I also expected this as I´m telling only the radio and the dropdown to process on the server. This is the bit I don´t understand though - the value in the textfield is persisted on postback. (See 2nd link above) Where is this value for this textfield saved if not in the backing bean ?
Submitted form values are stored in component on Apply Request Values phase.
For example in your case javax.faces.component.html.HtmlInputText#decode method of the textfield calls javax.faces.component.UIInput#setSubmittedValue. The submitted values are not set to the bean (as you expected) as the component is not included to execute part. Then inputText's renderer re-displays (writes to the response) the submitted values.
It works pretty the same when validation fails. Submitted values are stored on Apply Request Values phase, and then because of failed validation the submitted values are not set to beans (Update Model Values phase is skipped), then the submitted values are re-displayed.
I am working on a form which has two datatables. In the first datatable, I am displaying the radio buttons and checkboxes, whereas the second datatable contains
selectOneMenu(s). Value change listener has been implemented on the selectOneMenu and on value change, the subsequent fields gets populated based on the selection.
Everything works fine except that when I select the value from the dropdown, the checkbox and the radio button values are cleared.
f:ajax event="change" has been used for the change event on selectOneMenu. Looks like the whole page gets refreshed and the values are cleared.
I also tried using f:ajax by updating the id of the datatable in which the selectOneMenu is present.
<p:dataTable styleClass="borderless" id="inResultTable" var="result" value="#{RequestBean.fooFields}" rendered="#{not empty RequestBean.fooFields}">
<p:column style="width:150px;">
<f:facet name="header">
<h:outputText value=" " />
</f:facet>
<h:outputText value="#{msg[result.fldLabel]}" />
</p:column>
<p:column>
<f:facet name="header">
<h:outputText value="" />
</f:facet>
<ui:repeat value="#{RequestBean.fooFields}"
var="itm">
<h:selectOneMenu value="#{itm.indFieldValue}"
rendered="#{result.lvlid==itm.lvlid}"
style="width:250px;padding-right:150px;text-align: left;">
<f:selectItems value="#{RequestBean[itm.indField]}" />
</h:selectOneMenu>
<h:selectOneRadio value="#{itm.indFieldValue}" rendered="#{result.lvlid==itm.lvlid and result.fldType=='radio'}"
style="width:250px;padding-right:150px;text-align: left;">
<f:selectItems value="#{RequestBean[itm.indField]}" />
</h:selectOneRadio>
<h:selectManyCheckbox value="#{itm.indFieldCheckBox}" rendered="#{result.lvlid==itm.lvlid and result.fldType=='selectbox'}">
<f:selectItems value="#{RequestBean[itm.indField]}" />
</h:selectManyCheckbox>
</ui:repeat>
</p:column>
</p:dataTable>
<p:dataTable styleClass="borderless"
id="resultTable" var="result"
value="#{RequestBean.depFields}">
<h:selectOneMenu value="#{RequestBean.field4Value}"
valueChangeListener="#{RequestBean.processValueChange4}"
rendered="#{result.lvlid=='5' and result.fldType=='selectbox'}"
style="width:250px;padding-right:150px;text-align: left;">
<f:selectItem itemLabel="--Please Select--" itemValue="#{null}" />
<f:selectItems value="#{RequestBean[result.field]}" />
<f:ajax event="change" render="#form" />
</h:selectOneMenu>
...
...
</p:dataTable>
N.B: The requirement is such that the datatable with checkbox and radio buttons has to be placed at the top. IDs cannot be used for the selectOneMenu in the second table since I am
populating the selecOneMenu(s) dynamically based upon the entries in the database.
I know that this might be a simple issue but didn't have any luck with the info posted on most websites.
Any help would be appreciated.
Here's your <f:ajax>.
<f:ajax event="change" render="#form" />
You didn't specify the process attribute. So it defaults to #this, which means that only the current input component is processed during submit. However, you specified a render of the whole form. So the whole form will be refreshed. However, the other input components aren't been processed during submit. So their model values won't be updated, which means that during render response the initial values will be redisplayed instead of the submitted values, which are in your case apparently blank/null.
You've basically 2 options:
Process the whole form during submit.
<f:ajax process="#form" render="#form" />
Or, update only those components which really needs to be updated.
<f:ajax render="clientId1 clientId2 clientId3" />
In your particular case I think option 2 isn't viable, so option 1 is the best one. Please note that I omitted the event attribute. It defaults to change already.
Unrelated to the concrete problem, I'm not sure what you're all doing in your value change listener method, but I only want to note that most starters abuse it for the purpose of manipulating the model values and that it don't always work quite as expected (changed model values are not reflected at all). If this is true in your case, then you should actually be using <f:ajax listener> instead.
See also:
When to use valueChangeListener or f:ajax listener?
The main reason for the values of Check boxes & Radio buttons getting cleared after a value change listener could be that the model values are not updated.
Value change listeners are called before updating the model.
For these kind of issues, it is very important to have an understanding of the JSF lifecycle.
Please try following code in your value change listener and see.
public void valueChange(ValueChangeEvent event){
PhaseId phase = event.getPhaseId();
if (phase.equals(PhaseId.ANY_PHASE))
{
event.setPhaseId(PhaseId.UPDATE_MODEL_VALUES);
event.queue();
return;
}
if(!phase.equals(PhaseId.UPDATE_MODEL_VALUES))
{
return;
}
// Your code
}
I didn't try this code with your example. Please let me know with complete example source code if it is not working.
Thanks.
I have a form which contains a dropdown and two input fields.
<h:selectOneMenu />
<h:inputText />
<h:inputText />
I would like to make the required attribute of the input fields conditional depending on the selected value of the dropdown. If the user chooses the first item of the dropdown, then the input fields must be required. If the user chooses the second item, then those would not be required.
How can I achieve this?
Just bind the dropdown to the view and directly check its value in the required attribute.
<h:selectOneMenu binding="#{menu}" value="#{bean.item}">
<f:selectItem itemValue="first" itemLabel="First item" />
<f:selectItem itemValue="second" itemLabel="Second item" />
</h:selectOneMenu>
<h:inputText value="#{bean.input1}" required="#{menu.value eq 'first'}" />
<h:inputText value="#{bean.input2}" required="#{menu.value eq 'first'}" />
Note that the binding example is as-is. Do absolutely not set it to a bean property here. See also How does the 'binding' attribute work in JSF? When and how should it be used?
Also note that the ordering of the components is significant. If the menu is located below the inputs in the tree, use #{menu.submittedValue eq 'first'} instead. Or if you want to be independent from that, use #{param[menu.clientId] eq 'first'} instead.
Assuming you are using JSF 2.0: Let your SelectOneListBox execute with ajax and re-render the input fields on change of the list box:
A quick sketch:
<h:selectOneMenu value="#{myBean.myMenuValue}">
<f:ajax render="input1"/>
..
</h:selectOneMenu>
<h:inputText id="input1" value="#{myBean.myInputValue}"
required="#{myBean.myMenuValue == 'firstEntry'}" />
I am trying to validate a inputText box based on the selection of a CheckBox as shown below.
< <h:inputText required="#{param[facesContext.externalContext.response.namespace'form:checkBoxId']}"> >.
The issue is as you see, the component Ids are dynamic, I should be able to use facesContext.externalContext.response.namespace inside the EL expression. Is there a solution to it, appreciate any suggestions.
Thanks.
Just bind the UIComponent to a page scoped property and access its getValue() method.
<h:selectBooleanCheckbox binding="#{checkbox}" />
<h:inputText required="#{not empty checkbox.value and checkbox.value}" />
As to the dynamicness, you can also go around by just giving it a fixed id.
<h:form id="form">
<h:selectBooleanCheckbox id="checkbox" />
<h:inputText required="#{not empty param['form:checkbox'] and param['form:checkbox']}" />
</h:form>
It's however only ugly when it gets lengthy.