I have a datatable I display with some value from database etc.
I only want to render the datatable if there is values to display, if not maybe display a message saying there is no values.
I know you can add the datatable to a panelgroup, example:
<h:panelGroup rendered="#{myList > 0}">
Is there a better way of doing this? how would i display the message if the datatable is not rendered?
using jsf 2.2 and richfaces 4.
thanks
You can use opposite conditions for rendering message or result table. For example:
<h:outputText value="No payment receipt to display"
rendered="#{paymentReceiptList.size == 0}"/>
<rich:dataTable id="paymentReceiptTable" var="receipt"
value="#{paymentReceiptList}" rendered="#{paymentReceiptList.size > 0}" >
Or you can display "No result found" info inside rich:dataTable using:
<f:facet name="noData">
<h:outputText value="#{msg.noData}" />
</f:facet>
Or you can display your message inside rich:dataTable using noDataLabel attribute of rich:dataTable.
Related
I have a Primefaces datatable in a web application. One column contains a boolean (represented as selectBooleanCheckbox). Now I'd like to filter the table with this column. When I add the filterBy and filterMatchMode attributes the filtering header appears, but I have to filter using true or false.
This is the definition of the column:
<p:column headerText="A Bool" sortBy="someBool" width="20"
filterBy="someBool" filterMatchMode="exact">
<h:selectBooleanCheckbox value="#{row.someBool}" disabled="true" />
</p:column>
The display of the column with a checkbox is correct. Only the header is displayed as a text field.
I'm using Primefaces 4. How can I get a check box in the header to filter the data?
From Primefaces 4.0 User Guider, page 141:
If you’d like to use a dropdown instead of an input field to only allow
predefined filter values use filterOptions attribute and a collection/array of selectitems as value
This way you could filter by selecting true or false on the list. But you want a checkbox on the header, you could try this (also from the user guide, page 142):
<f:facet name="header">
<p:outputPanel>
<h:outputText value="Search all fields:" />
<h:inputText id="globalFilter" onkeyup="PF('carsTable').filter()" />
</p:outputPanel>
</facet>
I hope this can help you go in the right direction.
I am using PrimeFaces 5.1, In my project dataTable to filter used.In text filter is work fine but dropdown filter is not working properly (i.e) In dropdown I show department,First time I choose any value from dropdown is work fine anothertime I choose dropdown It not return any value show in dataTable.I choose select one first value from dropdown also throw null pointer exception.
<p:dataTable id="datalist" widgetVar="datalist" var="user" value=#{beanList.userList}>
<p:column headerText="Department" filterBy="#{user.deptname}"
filterMatchMode="exact" >
<f:facet name="filter">
<p:selectOneMenu onchange="PF('datalist').filter()">
<f:selectItem itemLabel="ALL" itemValue="#{null}"
noSelectionOption="true" />
<f:selectItems value="#{datalist.deptList}" />
</p:selectOneMenu>
</f:facet>
<h:outputText value="#{user.depatname}" />
</p:column>
</p:dataTable>
My doubt is default value ALL click and second time select any value return null or no data show in dataTable.
Since I don't know the scope of your Managed Bean: Try a scope longer than request (see PrimeFaces 5.1 User Documentation), and provide a value "filteredValue" for your table, like this:
<p:dataTable id="datalist" widgetVar="datalist" var="user"
value="#{beanList.userList}" filteredValue="#{beanList.filteredUserList}">
With that, you make sure to keep your filtered table/list in a field in your managed bean and the contents won't get lost.
Also, make sure your Managed Bean class is serializable (See this stackoverflow post)
I'm having a problem with the dataTable multiple selection with checkbox (like the second one: http://primefaces.org/showcase/ui/datatableRowSelectionRadioCheckbox.jsf).
When I try to execute a method in my backingBean, the selected items always comes with the right size, but, with the same object.
Example: I select in my dataTable three Messages: Message 1, Message 2 and Message 3. When I execute my method in the JSF page my selected items comes like this:
Messages[0] = Message 1
Messages[1] = Message 1
Messages[2] = Message 1
Here is my JSF Page:
<p:dataTable id="mensagensLidas" var="msg" value="#{mensagensBean.msgGrupoModel}"
paginator="true" rows="10" selection="#{mensagensBean.selectedMsgsGrupo}">
<p:column selectionMode="multiple" style="width:2%"/>
<p:column headerText="Titulo:" style="width:49%">
#{msg.titulo}
</p:column>
<f:facet name="footer">
<p:commandButton id="multiViewButton" value="#{msgs.delete}" icon="ui-icon-trash" actionListener="#{mensagensBean.excluirMsgsGrupo}" update=":tabMain" ajax="true"/>
</f:facet>
</p:dataTable>
Your above code is working fine for me except that I'm using a rowKey.
Try using rowKey attribute in p:dataTable
<p:dataTable id="mensagensLidas" var="msg" value="#{mensagensBean.msgGrupoModel}"
paginator="true" rows="10" selection="#{mensagensBean.selectedMsgsGrupo}"
rowKey="#{msg.titulo}">
....
</p:dataTable>
Using rowKey is must and best practice when you have selection in Datables, it helps to map the selected <tr> to the POJOs that you're filling up with.
Usually its even better if your rowKey is unique propety, you can even put an integer variable in your #{msg} POJO as best practice.
I discovered the problem. My DataModel was with the getRowData returning always the same object. I was doing a wrong comparison. Thank you all!
How do I show JSF components if a list is not null and it has a size() > 0?
EL offers the empty operator which checks both the nullness and emptiness of an object.
Thus, this should do:
<h:dataTable value="#{bean.list}" var="item" rendered="#{not empty bean.list}">
No need for a clumsy double check on both null and size() as suggested by other answers.
See also:
How do I display a message if a jsf datatable is empty?
Conditionally displaying JSF components
use rendered attribute. most of the components have this attribute.This attribute;s main purpose is to render components conditionally.
<h:dataTable value="#{bean.list}" rendered="{bean.list !=null && bean.list.size()>0}" >
In the above piece of jsf code, datatable would only be rendered when list is not null and the size of list is greater than 0
<h:outputText value="No Data to Display!" rendered="#{empty list1.List2}" />
<a href="#">
<h:outputText value="Data is present" rendered="#{not empty list1.List2}" /></a>
Or
<h:outputText value="#{not empty list1.List2 ? 'Data is Present' : 'No Data to Display'}" style="color:blue"/>
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.