<field name="agent" sortOrder="170" >
    <argument name="data" xsi:type="array">
        <item name="options" xsi:type="object"></item>
        <item name="config" xsi:type="array">
        <item name="label" xsi:type="string" translate="true">Module</item>
        <item name="visible" xsi:type="boolean">true</item>
        <item name="dataType" xsi:type="string">number</item>
        <item name="formElement" xsi:type="string">select</item>
        <item name="source" xsi:type="string">Test</item>
        <item name="dataScope" xsi:type="string">Module</item>

1 Answer 1


Check Cms module example. Your options tag object is empty. Add class following way:

<item name="options" xsi:type="object">Magento\Cms\Model\Page\Source\PageLayout</item>

And check here how create class as an example. Add your option class inside toOptionArray method. Ex:

 * Get options
 * @return array
public function toOptionArray()
    if ($this->options !== null) {
        return $this->options;

    $configOptions = $this->pageLayoutBuilder->getPageLayoutsConfig()->getOptions();
    $options = [];
    foreach ($configOptions as $key => $value) {
        $options[] = [
            'label' => $value,
            'value' => $key,
    $this->options = $options;

    return $this->options;

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