如何嵌入输入组件，例如将selectOneMenu放入PickList? [英] How do I embed an input component like e.g. a selectOneMenu into a PickList?

问题描述

将value属性放在selectOneMenu value="#{customer.customerType}"中时，出现以下错误:

I am getting the following error when I put the value attribute in the selectOneMenu value="#{customer.customerType}":

javax.el.PropertyNotFoundException:无法到达目标，标识符客户"解析为空

javax.el.PropertyNotFoundException: Target Unreachable, identifier 'customer' resolved to null

选择列表:

<p:pickList id="customersPL" itemLabel="#{customer.id}"
    itemValue="#{customer}" responsive="true"
    value="#{bean.customersList}" var="customer">

    <o:converter converterId="omnifaces.ListConverter"
        list="#{bean.customersListSource}" />

    <p:ajax event="transfer" listener="#{bean.onTransfer}" />

    <p:column>
        <h:outputText value="#{customer.name}" />
    </p:column>

    <p:column>
        <p:selectOneMenu converter="omnifaces.SelectItemsConverter"
            id="customerType" value="#{customer.customerType}">
            <f:selectItems itemLabel="#{customerType.name}"
                itemValue="#{customerType}"
                value="#{bean.customerTypesList}"
                var="customerType" />
        </p:selectOneMenu>
    </p:column>
</p:pickList>

Bean:

private CustomerType[] customerTypesList = CustomerType.values();

CustomerType枚举:

public static enum CustomerType {
    WHOLESALE("W", "Wholesale"), RETAIL("R", "Retail");

    private String id;
    private String name;

    TipoCliente(String id, String name) {
        this.id = id;
        this.name = name;
    }

    public String getId() {
        return id;
    }

    public String getName() {
        return name;
    }
}

推荐答案

选择列表通常不打算包含输入控件".因此，p:pickList从未被设计为包含h\p:selectonemenu甚至普通的h\p:inputTexts之类的输入.因此，它并不像您期望的那样工作，这只是不幸的.重新设计用户界面是唯一要做的事情.

Picklists in general are not intended to contain input 'controls'. So the p:pickList was never designed to contain inputs like h\p:selectonemenu or even plain h\p:inputTexts. So it does not work like you expect it to and that is just unfortunate. Redesigning your ui is the only thing to do.

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