我正在尝试使用“向下钻取”问题来设置Qualtrics调查。在第一个下拉菜单中，用户选择一位讲师，然后在第二个下拉列表中填充所选讲师提供的课程。
我需要做的是遍历第二个下拉列表中填充的所有课程（不仅仅是选定的课程，所有课程），以便为每个课程提出一个问题。为每门课程给出答案后，调查便完成了。
我怀疑Qualtrics无法遍历“向下钻取”问题是一个问题，因此我尝试将所选教员的所有课程都输送到一个单独的问题（请参见下面的代码），然后遍历该问题。这不起作用，因为Qualtrics似乎无法遍历动态生成的字段。另外，通过界面手动创建显示逻辑也是不可行的，因为有200多位讲师，每位讲师都有多门课程。有什么想法吗？
谢谢！
Qualtrics.SurveyEngine.addOnload(function() {
var ddl1 = document.getElementById("QR~QID1~1"); //Instructor
var ddl2 = document.getElementById("QR~QID1~2"); //Courses
var ddl3 = document.getElementById("QR~QID2"); // Separate dropdown with results from Courses Drill Down
//jQuery("#"+this.questionId).hide();
// When user selects Instructor dropdown
ddl1.onchange = function(element) {
if (ddl1.options[ddl1.selectedIndex].text !== '') {
// Load array with courses for selected instructor
var ddl2Array = new Array();
for (i = 0; i < ddl2.options.length; i++) {
ddl2Array[i] = ddl2.options[i].text;
}
console.log(ddl2Array);
//Clear all previous items from ddl3
ddl3.options.length = 0;
// Populate ddl3 with instructor specific courses
for (var i = 1; i < ddl2Array.length; i++) {
var opt = document.createElement('option');
opt.innerHTML = ddl2Array[i];
opt.value = ddl2Array[i];
ddl3.appendChild(opt);
}
}
}
});
<div id="Questions" role="main">
<!-- rivets: if runtime.SeparatorDisplayed -->
<div id="QID1Separator" class="Separator"></div>
<div class="QuestionOuter BorderColor DD QID1" id="QID1" questionid="QID1" posttag="QID1" data-runtime-remove-class-hidden="runtime.Displayed">
<div id="QR~QID1~VALIDATION" class="ValidationError" role="alert" data-runtime-show="runtime.ErrorMsg" data-runtime-html="runtime.ErrorMsg" style="display: none;"></div>
<div id="QR~QID1~SDPVALIDATION" class="ValidationError" role="alert" data-runtime-show="runtime.PDPErrorMsg" data-runtime-html="runtime.PDPErrorMsg" style="display: none;"></div>
<div class="Inner BorderColor DL">
<div class="InnerInner BorderColor">
<fieldset>
<legend>
<div class="QuestionText BorderColor">Click to write the question text</div>
</legend>
<div class="QuestionBody">
<table role="presentation" class="ChoiceStructure" cellpadding="0" cellspacing="0">
<tbody>
<tr class="reg">
<td>
<label for="QR~QID1~1">Instructor</label>
</td>
<td>
<!-- the html binding blows aways the value binding, so do that last-->
<select class="drillDownSelectDropDown QWatchTimer" name="QR~QID1~1" id="QR~QID1~1" data-runtime-select-options="runtime.Choices.1.optionHTML" data-runtime-enabled="runtime.Choices.1.enabled" data-runtime-value="runtime.Choices.1.Value">
<option aria-label="Blank"></option>
<option value="1">Smith</option>
<option value="5">Johnson</option>
<option value="8">Baker</option>
</select>
</td>
</tr>
<tr class="alt">
<td>
<label for="QR~QID1~2">Course</label>
</td>
<td>
<!-- the html binding blows aways the value binding, so do that last-->
<select class="drillDownSelectDropDown QWatchTimer" name="QR~QID1~2" id="QR~QID1~2" data-runtime-select-options="runtime.Choices.2.optionHTML" data-runtime-enabled="runtime.Choices.2.enabled" data-runtime-value="runtime.Choices.2.Value" disabled=""></select>
</td>
</tr>
</tbody>
</table>
</div>
</fieldset>
</div>
</div>
</div>
<!-- rivets: if runtime.SeparatorDisplayed -->
<div id="QID2Separator" class="Separator"></div>
<div class="QuestionOuter BorderColor MC QID2" id="QID2" questionid="QID2" posttag="QID2" data-runtime-remove-class-hidden="runtime.Displayed">
<div id="QR~QID2~VALIDATION" class="ValidationError" role="alert" data-runtime-show="runtime.ErrorMsg" data-runtime-html="runtime.ErrorMsg" style="display: none;"></div>
<div id="QR~QID2~SDPVALIDATION" class="ValidationError" role="alert" data-runtime-show="runtime.PDPErrorMsg" data-runtime-html="runtime.PDPErrorMsg" style="display: none;"></div>
<div class="Inner BorderColor MSB">
<div class="InnerInner BorderColor">
<fieldset>
<legend>
<label class="QuestionText BorderColor" for="QR~QID2">Click to write the question text</label>
</legend>
<div class="QuestionBody">
<div class="offScreen">To select multiple options in a row, click and drag your mouse or hold down Shift when selecting. To select non-sequential options, hold down Control (on a PC) or Command (on a Mac) when clicking. To deselect an option, hold down Control or Command and click on a selected option.</div>
<select role="listbox" aria-multiselectable="true" multiple="" size="10" class="ChoiceStructure QR-QID2 QWatchTimer" name="QR~QID2[]" id="QR~QID2" data-runtime-value="runtime.Selected">
<option role="option" class="Selection" aria-selected="false" value="QR~QID2~1" id="QR~QID2~1" data-runtime-text="runtime.Choices.1.Display">Click to write Choice 1</option>
</select>
<div class="clear zero"></div>
</div>
</fieldset>
</div>
</div>
</div>
</div>
答案 0 :(得分：0)
如果我对您的理解正确，则您希望响应者选择一位讲师，然后针对该讲师提供的每门课程回答一个问题。
在这种情况下，您不需要向下钻取问题，只需使用两个多项选择题即可。我会尝试以下方法：
第一季度：选择一名讲师
Q2，Q3，...，Qn（每位讲师一个问题）-选择一门课程。将每个问题放在单独的方框中。然后转到“调查流”选项卡并添加分支逻辑：在Q1中选择了相应的讲师后，显示每个块。
然后，在每个教师特定的块上创建一个循环。