/**
     * @ORM\Column(name="feature_1_image_1", type="string", nullable=true)
     * @Eccube\FormAppend(
     *  auto_render=true,
     *  type="\Symfony\Component\Form\Extension\Core\Type\FileType",
     *  form_theme="Form\admin_image.twig",
     *  options={
     *      "required": false,
     *      "label":"特徴1画像1",
     *      "data_class":null,
     *  }
     * )
     */
    public $feature_1_image_1;

    public function setFeature1Image1($feature_1_image_1)
    {
        $this->feature_1_image_1 = $feature_1_image_1;
    }

    public function getFeature1Image1()
    {
        return $this->feature_1_image_1;
    }

{%- block form_row -%}
<div class="row">
    <div class="col-3">
        <span>{{ form.vars.label|trans }}</span>
    </div>
    <div class="col mb-2 image-group">
        <div>
            {{ form_widget(form, {'attr': {'class': 'image-upload-form'}}) }}
            {{ form_errors(form) }}
        </div>
        {% if form.vars.data %}
        <img src="{{ asset(form.vars.data, 'save_image') }}" class="image-uploaded" alt="">
        <label for="{{ form.vars.name }}_delete"><input type="checkbox" name="{{ form.vars.name }}_delete" id="{{ form.vars.name }}">削除</label>
        {% else %}
        <img src="" class="image-uploaded" alt="">
        {% endif %}
    </div>
</div>
{%- endblock form_row -%}

$images = preg_grep('/feature_(.*?)_image_(.*?)/', array_keys($form->all()));

foreach ($images as $key) {
    $image = $form->get($key)->getData();
    $isDelete = $request->get($key.'_delete');
    if (!$isDelete) {
        if (!empty($image)) {
            /**
             * 画像が入力された場合
             */
            $file = new File($image->getPathName());
            $fileName = sha1(uniqid(mt_rand(),true)) . '.' . $image->guessExtension();
            $file->move($this->eccubeConfig['eccube_save_image_dir'], $fileName);
            $Product->setFeature1Image1($fileName);
        }else{
            /**
             * 画像が入力されなかった場合。
             */
            // 現在保存されている画像パスをそのままセットする
            $Product->setFeature1Image1($featureImages['feature_1_image_1']);
        }
    }else{
        /**
         * 削除
         *
         * 何もしなければ自動的に削除される
         */

    }
}