orbeon - 基于 Orbeon 中重复部分的迭代控件动态值的条件

Question

我在重复部分有一个复选框。在迭代中只能勾选一次。一旦在重复部分中打勾，其余部分必须是只读的。例如：“一旦让他成为主要申请人”被选中，那么其他（上一个和下一个）迭代中的复选框必须被禁用或隐藏或只读，值为空。请帮助我如何实现这一目标。

<xh:html xmlns:xh="http://www.w3.org/1999/xhtml" xmlns:xf="http://www.w3.org/2002/xforms"
     xmlns:xs="http://www.w3.org/2001/XMLSchema"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xmlns:ev="http://www.w3.org/2001/xml-events"
     xmlns:xi="http://www.w3.org/2001/XInclude"
     xmlns:xxi="http://orbeon.org/oxf/xml/xinclude"
     xmlns:xxf="http://orbeon.org/oxf/xml/xforms"
     xmlns:exf="http://www.exforms.org/exf/1-0"
     xmlns:fr="http://orbeon.org/oxf/xml/form-runner"
     xmlns:saxon="http://saxon.sf.net/"
     xmlns:sql="http://orbeon.org/oxf/xml/sql"
     xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"
     xmlns:fb="http://orbeon.org/oxf/xml/form-builder">
<xh:head>
    <xh:title>Untitled Form</xh:title>
    <xf:model id="fr-form-model" xxf:expose-xpath-types="true">

        <!-- Main instance -->
        <xf:instance id="fr-form-instance" xxf:exclude-result-prefixes="#all" xxf:index="id">
            <form>

                <section-1>
                    <section-1-iteration>
                        <surname/>
                        <checkbox>false</checkbox>
                    </section-1-iteration>
                </section-1>
            </form>
        </xf:instance>

        <!-- Bindings -->
        <xf:bind id="fr-form-binds" ref="instance('fr-form-instance')">

            <xf:bind id="section-1-bind" ref="section-1" name="section-1">
                <xf:bind id="section-1-iteration-bind" ref="section-1-iteration"
                         name="section-1-iteration">
                    <xf:bind id="surname-bind" ref="surname" name="surname" xxf:whitespace="trim"/>
                    <xf:bind id="checkbox-bind" ref="checkbox" name="checkbox" type="xf:boolean"
                             readonly="(../checkbox)"/>
                </xf:bind>
            </xf:bind>
        </xf:bind>

        <!-- Metadata -->
        <xf:instance xxf:readonly="true" id="fr-form-metadata" xxf:exclude-result-prefixes="#all">
            <metadata>
                <application-name>a</application-name>
                <form-name>a</form-name>
                <title xml:lang="en">Untitled Form</title>
                <description xml:lang="en"/>
                <singleton>false</singleton>
            </metadata>
        </xf:instance>

        <!-- Attachments -->
        <xf:instance id="fr-form-attachments" xxf:exclude-result-prefixes="#all">
            <attachments>
                <css mediatype="text/css" filename="" size=""/>
                <pdf mediatype="application/pdf" filename="" size=""/>
            </attachments>
        </xf:instance>

        <!-- All form resources -->
        <!-- Don't make readonly by default in case a service modifies the resources -->
        <xf:instance id="fr-form-resources" xxf:readonly="false" xxf:exclude-result-prefixes="#all">
            <resources>
                <resource xml:lang="en">
                    <surname>
                        <label>Full Name</label>
                        <hint/>
                    </surname>
                    <checkbox>
                        <label>Make him primary applicant</label>
                        <hint/>
                    </checkbox>

                    <section-1>
                        <label>Caregiver</label>
                    </section-1>



                </resource>
            </resources>
        </xf:instance>

        <xf:instance xxf:readonly="true" id="section-1-template" xxf:exclude-result-prefixes="#all">
            <section-1-iteration>
                <surname/>
                <checkbox>false</checkbox>
            </section-1-iteration>
        </xf:instance>

    </xf:model>
</xh:head>
<xh:body>
    <fr:view>
        <fr:body xmlns:xbl="http://www.w3.org/ns/xbl" xmlns:p="http://www.orbeon.com/oxf/pipeline"
                 xmlns:oxf="http://www.orbeon.com/oxf/processors">

            <fr:section id="section-1-section" bind="section-1-bind" repeat="content" min="1"
                        template="instance('section-1-template')"
                        apply-defaults="true"
                        fb:initial-iterations="first">
                <xf:label ref="$form-resources/section-1/label"/>
                <fr:grid id="grid-2-grid">
                    <fr:c x="1" y="1" w="12">
                        <xf:input id="surname-control" bind="surname-bind">
                            <xf:label ref="$form-resources/surname/label"/>
                            <xf:hint ref="$form-resources/surname/hint"/>
                            <xf:alert ref="$fr-resources/detail/labels/alert"/>


                        </xf:input>
                    </fr:c>
                    <fr:c x="1" y="2" w="12">
                        <fr:checkbox-input xmlns="http://orbeon.org/oxf/xml/form-builder"
                                           xmlns:xxbl="http://orbeon.org/oxf/xml/xbl"
                                           id="checkbox-control"
                                           bind="checkbox-bind">
                            <xf:label ref="$form-resources/checkbox/label"/>
                            <xf:hint ref="$form-resources/checkbox/hint"/>
                            <xf:alert ref="$fr-resources/detail/labels/alert"/>


                        </fr:checkbox-input>
                    </fr:c>
                </fr:grid>
            </fr:section>
        </fr:body>
    </fr:view>
</xh:body>

标签： orbeonxforms

Answer 1

Assuming you named your Single Checkbox field my-checkbox, then you can use the following validation XPath expression:

count(//my-checkbox[string() = 'true']) <= 1 or
string() != 'true'

With this expression, if you have more than one checkbox checked, then all the checked checkboxes will be marked as invalid, thus informing users they must change their selection, and preventing the data from being saved or submitted (if you indeed don't want invalid data to be saved or submitted).

You might also want to add a custom alert message, like "you can't select more than one primary applicant", so users know what the problem is.