初始化primefaces数据表rowkey(Initializing primefaces datatable rowkey)

 我有一个primefaces数据表，一旦用户点击搜索按钮，我就会在ArrayList中填充对象的属性。 我需要添加一个带有单选按钮的列，以便用户可以选择要更新的表的一行。 我想将rowkey设置为我的对象的metadataKey属性，但是我收到以下错误： 
 
 
 
 rowKey =“＃{result.metadataKey}”：在类型java.lang.String上找不到属性'metadataKey' 
 
 
 我认为这是由表格呈现时不存在的metadataKey引起的。 为了解决这个问题，我将表设置为仅在用户完成搜索后呈现，但这导致了相同的错误。 
 
 这是相关的html： 
 
<h:form id="dataForm">
    <p:panel styleClass="centered">
        <p:messages id="message" showDetails="true" autoUpdate="true" />
        <p:outputLabel id="searchLabel" value="Search for Metadata:  " />&nbsp;&nbsp;&nbsp;
                <p:inputText id="search"
            value="#{updateMetadataItemsBean.searchTerm}" />&nbsp;&nbsp;&nbsp;
                <p:commandButton id="searchButton" value="Search" 
            action="#{updateMetadataItemsBean.search}"
            update="dataForm:metadataitems, message, dataForm:dataPanel" />
        <br />
        <br />
        <br />
    </p:panel>
    <p:panel styleClass="center" id="dataPanel" >
        <p:dataTable id="metadataitems" var="result"
            value="#{updateMetadataItemsBean.results}" styleClass="center"
            resizableColumns="true"
            selection="updateMetadataItemsBean.selectedMetadataItem"
            rowKey="#{result.metadataKey}" rendered="#{updateMetadataItemsBean.show}">              
            <p:column headerText="Select Item to Update" selectionMode="single"></p:column>
            <p:column headerText="Metadata Key">
                <h:outputText value="#{result.metadataKey}" />
            </p:column>
            <p:column headerText="Map Name">
                <h:outputText value="#{result.mapName}" />
            </p:column>
            <p:column headerText="Metadata Name">
                <h:outputText value="#{result.metadataName}" />
            </p:column>
            <p:column headerText="Metadata Value">
                <h:outputText value="#{result.metadataValue}" />
            </p:column>
            <p:column headerText="WTX Adapter">
                <h:outputText value="#{result.wtxAdapter}" />
            </p:column>
            <p:column headerText="Card Number">
                <h:outputText value="#{result.cardNumber}" />
            </p:column>
            <p:column headerText="Create Date TS">
                <h:outputText value="#{result.createDateTS}" />
            </p:column>
        </p:dataTable>
        <br />
        <br />
        <br />
    </p:panel>
 
 这是来自bean的相关代码： 
 
public class UpdateMetadataItemsBean implements Serializable{
public static final long serialVersionUID = 4;
private String metadataKey;
private String mapName;
private String metadataName;
private String metadataValue;
private String wtxAdapter;
private String cardNumber;
private String createDateTS;
private String searchTerm;
private String selectedDataKey;
private boolean show = false;
private MetadataItems selectedMetadataItem;
private ArrayList<MetadataItems> results = new ArrayList<MetadataItems>();

[getters and setters]

public void search() {
    Search s = new Search();
    setResults(s.search(searchTerm));

    setShow(true);
}
 
 提前感谢任何能指出我正确方向的人。 

I have a primefaces datatable that I'm populating with properties of objects in an ArrayList once the user clicks a search button. I need to add a column with a radio button so that the user can select a row of the table to update. I'd like to set the rowkey to be the metadataKey property of my objects, but I get the following error:
 
 
 
rowKey="#{result.metadataKey}": Property 'metadataKey' not found on type java.lang.String
 
 
I believed that this was caused by the metadataKey not existing at the time the table is rendered. To remedy it, I set the table to render only after the user had completed their search, but this resulted in the same error. 
 
Here is the relevant html:
 
<h:form id="dataForm">
    <p:panel styleClass="centered">
        <p:messages id="message" showDetails="true" autoUpdate="true" />
        <p:outputLabel id="searchLabel" value="Search for Metadata:  " />&nbsp;&nbsp;&nbsp;
                <p:inputText id="search"
            value="#{updateMetadataItemsBean.searchTerm}" />&nbsp;&nbsp;&nbsp;
                <p:commandButton id="searchButton" value="Search" 
            action="#{updateMetadataItemsBean.search}"
            update="dataForm:metadataitems, message, dataForm:dataPanel" />
        <br />
        <br />
        <br />
    </p:panel>
    <p:panel styleClass="center" id="dataPanel" >
        <p:dataTable id="metadataitems" var="result"
            value="#{updateMetadataItemsBean.results}" styleClass="center"
            resizableColumns="true"
            selection="updateMetadataItemsBean.selectedMetadataItem"
            rowKey="#{result.metadataKey}" rendered="#{updateMetadataItemsBean.show}">              
            <p:column headerText="Select Item to Update" selectionMode="single"></p:column>
            <p:column headerText="Metadata Key">
                <h:outputText value="#{result.metadataKey}" />
            </p:column>
            <p:column headerText="Map Name">
                <h:outputText value="#{result.mapName}" />
            </p:column>
            <p:column headerText="Metadata Name">
                <h:outputText value="#{result.metadataName}" />
            </p:column>
            <p:column headerText="Metadata Value">
                <h:outputText value="#{result.metadataValue}" />
            </p:column>
            <p:column headerText="WTX Adapter">
                <h:outputText value="#{result.wtxAdapter}" />
            </p:column>
            <p:column headerText="Card Number">
                <h:outputText value="#{result.cardNumber}" />
            </p:column>
            <p:column headerText="Create Date TS">
                <h:outputText value="#{result.createDateTS}" />
            </p:column>
        </p:dataTable>
        <br />
        <br />
        <br />
    </p:panel>
 
This is the relevant code from the bean:
 
public class UpdateMetadataItemsBean implements Serializable{
public static final long serialVersionUID = 4;
private String metadataKey;
private String mapName;
private String metadataName;
private String metadataValue;
private String wtxAdapter;
private String cardNumber;
private String createDateTS;
private String searchTerm;
private String selectedDataKey;
private boolean show = false;
private MetadataItems selectedMetadataItem;
private ArrayList<MetadataItems> results = new ArrayList<MetadataItems>();

[getters and setters]

public void search() {
    Search s = new Search();
    setResults(s.search(searchTerm));

    setShow(true);
}
 
Thanks in advance to anyone who can point me in the right direction.

原文：https://stackoverflow.com/questions/31052647