How to add products grid in Edit/new form

Question

I am working on an extension where i want to load products grid serializer inside form. I followed magento_catalog and adding below code in my ui_component form.

<fieldset name="assign_products">
 <argument name="data" xsi:type="array">
 <item name="config" xsi:type="array">
 <item name="label" xsi:type="string" translate="true">Products in Category</item>
 <item name="collapsible" xsi:type="boolean">true</item>
 <item name="sortOrder" xsi:type="number">40</item>
 </item>
 </argument>
 <container name="assign_products_container" >
 <argument name="data" xsi:type="array">
 <item name="config" xsi:type="array">
 <item name="sortOrder" xsi:type="number">160</item>
 </item>
 </argument>
 <htmlContent name="html_content">
 <argument name="block" xsi:type="object">Magento\Catalog\Block\Adminhtml\Category\AssignProducts</argument>
 </htmlContent>
 </container>
</fieldset>

but getting this error

Fatal error: Uncaught Error: Call to a member function getProductsReadonly() on null in C:\xampp\htdocs\m22\vendor\magento\module-catalog\Block\Adminhtml\Category\Tab\Product.php:137

Answer 1

Try this code :

 <block class="<vendor_name>\<module_name>\Block\Adminhtml\Grid\AssignedProduct" name="promo_catalog_edit_tab_affected" >
 <arguments>
 <argument name="config" xsi:type="array">
 <item name="label" xsi:type="string" translate="true">Products in Category</item>
 <item name="collapsible" xsi:type="boolean">true</item>
 <item name="opened" xsi:type="boolean">false</item>
 <item name="sortOrder" xsi:type="number">40</item>
 <item name="canShow" xsi:type="boolean">true</item>
 <item name="componentType" xsi:type="string">fieldset</item>
 </argument>
 </arguments>
 </block>

• Ashar Riaz: this is not working