如何验证在多 Select 屏幕中至少选中了一个复选框

Question

假设我想在多 Select 屏幕（类型 = 4）中验证至少选中了一个复选框。在下面的示例中，如何定义相关验证的条件？

<question title="Preferrable Colors" type="4" key="#1">
  <answer nextQuestionKey="END" key="#1_1"  position="0">
    <text>Pink</text>
  </answer>
  <answer nextQuestionKey="END" key="#1_2"  position="1">
    <text>Red</text>
  </answer>
  <answer nextQuestionKey="END" key="#1_3"  position="2">
    <text>Violet</text>
  </answer>
  <text>Select the colors you prefer </text>
  <validation type="ERROR">
    <condition>true</condition>
    <text>Sorry, you have to select at least one color</text>
  </validation>
</question>

Answer 1

您可以将条件定义为：

<condition>getQuestionValueNew() == ""</condition>

因此，当没有选择任何东西时，这个 returns true 如果选择了东西，它 returns false.

Answer 2

在此静态场景中满足您的要求的一种简单方法是使用 isAnswerSelectedByClientKey 方法查看每个答案的 'checked state'。此方法将 return true 或 false 在我的方法中，我将所有 'states' 写入数组并执行之后检查 true 是否存在。

            <question title="Preferrable Colors" type="4" key="#1">
            <answer nextQuestionKey="END" key="#1_1" position="0">
                <text>Pink</text>
            </answer>
            <answer nextQuestionKey="END" key="#1_2" position="1">
                <text>Red</text>
            </answer>
            <answer nextQuestionKey="END" key="#1_3" position="2">
                <text>Violet</text>
            </answer>
            <text>Select the colors you prefer </text>
            <validation type="ERROR">
                <condition>hasValue(selArray, true) == false</condition>
                <text>Sorry, you have to select at least one color</text>
            </validation>
            <onLeaveOkPrepareAssignment>
                selArray = null;        
                selArray['1'] = isAnswerSelectedByClientKey($answer:'#1_1', null);
                selArray['2'] = isAnswerSelectedByClientKey($answer:'#1_2', null);
                selArray['3'] = isAnswerSelectedByClientKey($answer:'#1_3', null);          
            </onLeaveOkPrepareAssignment>
        </question>

如何验证在多 Select 屏幕中至少选中了一个复选框

How to validate that at least one check box is selected in a Multi Select Screen

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