原始数据可自定义排序具有动态列的功能 [英] Primefaces Datatable custom sort Function with dynamic columns

问题描述

使用Primefaces 3.5，当我尝试使用动态列的自定义排序函数时，我会得到一个 PropertyNotFoundException 。

Using Primefaces 3.5, I get a PropertyNotFoundException when I try to use a custom sort function with dynamic columns.

我在xhtml文件中的datatable是（只显示相关代码）

My datatable in xhtml file is (just show the relevant code)

<p:dataTable id="dataTableVersioneMonitoraggio" var="row" value="# {monitoraggioBean.pacchetti}" 
                 rowKey="#{row.pacchetto.id}">

<p:columns value="#{monitoraggioBean.columns}" var="column"
           sortBy="#{row.celle[column.posizione].cella.valore}"
                sortFunction="#{monitoraggioBean.customSort}">               
  ...         
</p:columns>

</p:dataTable>

我的视图范围支持bean中的不完整的方法是：

The incomplete method in my view scope backing bean is:

public int customSort(Object val1, Object val2) {
    System.out.println("mySort" + val1 + "/" + val2);
    return 0;
}

问题是我无法在bean中达到这种方法，我得到以下错误：

The problem is I can't reach this method in the bean and I get the following errors:

GRAVE [javax.enterprise.resource.webcontainer.jsf.context] (http--0.0.0.0-8080-3) javax.el.PropertyNotFoundException: /monitoraggio.xhtml @80,161 sortFunction="#{monitoraggioBean.customSort}": The class 'com.packman.bean.MonitoraggioBean' does not have the property 'customSort'.

我已经尝试过使用p：column标签的自定义排序功能，它可以工作。

I have tried custom sort function with p:column tag and it works.

任何想法？

谢谢

推荐答案

我想出了一个解决方案/解决方法。我认为这是在p列标签和sortFunction属性上的Primefaces 3.5的错误。

I've come up with a solution/workaround. I think this is a bug of Primefaces 3.5 on p columns tag and sortFunction property.

Primefaces希望在 sortFunction =＃{monitoraggioBean.customSort}上的方法表达式，但它希望对待它作为值表达式，并尝试找出getter / setter方法。

Primefaces expects a method expression on sortFunction="#{monitoraggioBean.customSort}" but it wants to treat it as value expression and tries to find out for getter/setter methods.

我的解决方法是在sortFunction中为name方法定义getter，并在支持bean中创建方法表达式。

My workaround is to define "getter" for the name method in sortFunction and to create the Method Expression in the backing bean.

public MethodExpression getOrdina() {
    FacesContext context = FacesContext.getCurrentInstance();
    return context.getApplication().getExpressionFactory().createMethodExpression(context.getELContext(), "#{monitoraggioBean.ordina}", Integer.class, new Class[]{Object.class, Object.class});
}

自定义排序的方法也必须在bean中定义： p>

The mehod for custom sorting has to be defined too in the bean:

public int customSort(Object val1, Object val2) {
    System.out.println("mySort" + val1 + "/" + val2);
    return 0;
}

以这种方式，当您点击列的标题时，首先getOrdina（ ）被调用然后customSort（...），您可以在其中实现排序逻辑。

In this way, when you click on the header of a column firstly getOrdina() is called and then customSort(...), where you can implement your sorting logic.

享受！ ：）

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