Primefaces中的单元格编辑不会更新值 [英] Cell edit in primefaces is not updating the value
问题描述
我的primefaces应用程序中有一个数据表.前端代码具有
I have a datatable in my primefaces application . The code for the frontend has
<!-- Start of customer datatable -->
<p:dataTable var="customer" value="#{customerBean.customers}" paginator="true" selection="#{customerBean.selectedCustomer}"
selectionMode="single" onRowSelectUpdate=":custList" onRowSelectComplete="custTab.show()" id="custList" widgetVar="custList" update=":custList">
<f:facet name="header">
List of Customers
<p:outputPanel>
<p:commandButton value="+" type="button" onclick="addCustDlg.show()"/>
</p:outputPanel>
</f:facet>
<p:column sortBy="#{customer.id}" filterBy="#{customer.id}" update=":custList">
<f:facet name="header">
<h:outputText value="ID"/>
</f:facet>
<h:outputText value="#{customer.id}"/>
</p:column>
<p:column sortBy="#{customer.name}" filterBy="#{customer.name}" headerText="NAME" filterMatchMode="contains" update=":custList">
<p:cellEditor>
<f:facet name="output">
<h:outputText value="#{customer.name}"/>
</f:facet>
<f:facet name="input">
<p:inputText value="#{customer.name}"/>
</f:facet>
</p:cellEditor>
</p:column>
<p:column sortBy="#{customer.description}" filterBy="#{customer.description}" headerText="DESCRIPTION">
<p:cellEditor>
<f:facet name="output">
<h:outputText value="#{customer.description}"/>
</f:facet>
<f:facet name="input">
<p:inputText value="#{customer.description}"/>
</f:facet>
</p:cellEditor>
</p:column>
<p:column sortBy="#{customer.signupDate}" filterBy="#{customer.signupDate}" headerText="SIGN UP DATE">
<f:facet name="output">
<h:outputText value="#{customer.signupDate}"/>
</f:facet>
</p:column>
<p:column sortBy="#{customer.validUntil}" filterBy="#{customer.validUntil}" headerText="EXPIRY DATE">
<p:cellEditor>
<f:facet name="output">
<h:outputText value="#{customer.validUntil}"/>
</f:facet>
<f:facet name="input">
<p:inputText value="#{customer.validUntil}"/>
</f:facet>
</p:cellEditor>
</p:column>
<p:column sortBy="#{customer.status}" filterBy="#{customer.status}" headerText="STATUS">
<p:cellEditor>
<f:facet name="output">
<h:outputText value="#{customer.status}"/>
</f:facet>
<f:facet name="input">
<p:inputText value="#{customer.status}"/>
</f:facet>
</p:cellEditor>
</p:column>
<p:column headerText="CREATION DATE" sortBy="#{customer.creationDate}" filterBy="#{customer.creationDate}">
<f:facet name="output">
<h:outputText value="#{customer.creationDate}"/>
</f:facet>
</p:column>
<p:column headerText="LAST UPDATE DATE" sortBy="#{customer.lastUpdateDate}" filterBy="#{customer.lastUpdateDate}">
<f:facet name="output">
<h:outputText value="#{customer.lastUpdateDate}"/>
</f:facet>
</p:column>
<p:column headerText="Options">
<p:rowEditor/>
</p:column>
</p:dataTable>
<!-- End of dataTable (customer datatable) -->
并且在bean中将用于处理rowEvent的函数指定为
And the function for handling the rowEvent is specified in the bean as
public void custRowEdit(RowEditEvent event){
Customer cust = (Customer) event.getObject();
EntityManagerHelper.beginTransaction();
custDao.update(cust);
EntityManagerHelper.commit();
}
但是,在更新事件中,当我编辑表中的单元格时,没有获得该属性的新更新值.
However , on an update event , when I am editing the cell in the table , I do not get the new updated value of the attribute .
就像下面的图片一样,当我将ID 1的条目的状态从11修改为4时,在函数custRowEdit中,当我尝试获取客户对象时,我仍然获得客户的状态11和不是4.
Like in the image below , when I edit the status of the entry with ID 1 from 11 to 4 , in the function custRowEdit , when I try to get the customer object , I still get the status of the customer as 11 and not 4 .
有人可以帮助我理解为什么未设置单元格的值吗?
Can anyone help me with understanding why the value of the cell is not being set ?
推荐答案
这对我有所帮助.
我可以补充一点,如果没有@构造函数托管的bean,则可以从构造函数中的查询中加载列表,而可以使用reset()方法将列表重置为null,然后从查询中懒惰地填充列表. .然后可以使用f:event在页面加载时调用重置:
May I add that instead of loading the list from a query in the constructor, if one has a @SessionScoped managed bean one can instead use a reset() method to reset lists to null and then lazily populate the lists from the query. The reset can then be called on page load using an f:event:
<f:view>
<f:metadata>
<f:event type="preRenderView" listener="#{sessionScopedBean.reset}"/>
</f:metadata>
</f:view>
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