I am working on an extension which offers custom widgets that include wysiwyg editor and image fields:

<widget id="masonry_category" class="MyCompany\Module\Block\Widget\Category" is_email_compatible="true">
<label translate="true">Masonry: Category</label>
<description translate="true">Category Image with Link</description>
    <parameter name="featured_image" xsi:type="image" visible="true" required="false">
        <label translate="true">Category Image</label>

However, as far as I can see, we are not allowed to use these types:

Element 'parameter', attribute '{http://www.w3.org/2001/XMLSchema-instance}type': The QName value 'image' of the xsi:type attribute does not resolve to a type definition.

I see some rules for widgets in Magento_Widget:etc/widget.xsd, but I am not sure how would I go about extending this. Unfortunately, the official documentation didn't help me to figure this out.

BTW, one very weird thing about this: I don't see these errors on my local environment (with development mode turned ON + PHP mode for displaying all errors). And my types (editor and image) are working fine. I run into trouble as soon as I deploy the code to our staging environment, which doesn't make sense to me.

2 Answers 2


Found the solution and wrote a blog post http://mageclass.com/quick-tip-how-to-use-image-wyswyg-or-any-other-non-standard-field-in-magento2-widget/. I am not sure if it's in line with the best practices, the only requirement I had was not to touch the core.

  • I've tried to add this to my widget, and all seemed to work. However when I re-open my widget, then delete an image and try and access that widget again, I get the following error "Exception #0 (Exception): Notice: Array to string conversion in XXXXXXXX/vendor/magento/framework/Data/Form/Element/Image.php on line 51" - can you confirm that this is not a bug with your code? Still struglling with Magento 2, and so there is every chance it is my implementation, but I want to rule out a bug first. Thanks.
    – RichardB
    Commented Jan 17, 2017 at 22:03

By default, the input types are:

  • text
  • textarea
  • select
  • multiselect

However, you can declare another types, for example using render function in the block, in my opinion is the best way.

First step, write a block, in this case is for render a date field:

class Theme_Module_Block_Date extends Mage_Adminhtml_Block_Widget_Form_Renderer_Fieldset_Element
        public function render(Varien_Data_Form_Element_Abstract $element)
            $this->_element = $element;

            return $this->toHtml();

Second step you must declare the input in widget.xml:


Another examples to render:

class Theme_Module_Block_Hour extends Mage_Adminhtml_Block_Widget_Form_Renderer_Fieldset_Element

    public function render(Varien_Data_Form_Element_Abstract $element)
        $this->_element = $element;

        return $this->toHtml();

In widget.xml:

... theme_module/hour ...

I hope this may help you.

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