I have a product attribute dropdown select box that I populate via a source model.

The population works fine, but I want the first option in the list to be "Select one...". I've used the following code:

$options[] = array(
  'label' => 'Select one...',
  'value' => '',

But the result is as follows:

Duplicated empty item in select attribute

With the rendered HTML:

  <option value="">Select one...</option>
  <option data-title="Select one..." value="">Select one...</option>

What am I doing wrong?

3 Answers 3


@awarche's answer works:

You'll need to add a caption to your UI component field config:

<item name="caption" xsi:type="string" translate="true">Select one...</item>

I don't think an empty "Please select..." value belongs in a source model.


So not sure how to do this with a label but if you just want a empty select you need to follow the core example and use an empty string:


 * @param array $options
 * @return array
private function addEmptyOption(array $options)
    array_unshift($options, ['label' => $this->getAttribute()->getIsRequired() ? '' : ' ', 'value' => '']);
    return $options;

i.e 'label' => ' ',


It works with label ' ' and value ''.

Maybe the select field component has some restrictions or rather a bug.

If you add the select attribute's values with InstallData or UpgradeData using the 'source' property, you also need to include a space for the empty option's label.

namespace <yournamespace>\<yourmodule>\Helper;

use Magento\Eav\Model\Entity\Attribute\Source\AbstractSource;

class <YourProduct>ProductAttribute extends AbstractSource
    public const DEMO_ATTR = "demo_attr";

    public function getAllOptions(): ?array
        if ($this->_options === null) {
            $this->_options = [
                ['label' => ' ', 'value' => ''],
                ['label' => 'First value', 'value' => 1],
        return $this->_options;
  • 1
    The right way is to add caption to the select component <item name="caption" xsi:type="string" translate="true">Select one...</item>
    – awarche
    Commented Oct 2, 2017 at 13:02

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