Magento 2 – Fix Class Magento\Catalog\Model\Product\Attribute\Backend\LayoutUpdate Does Not Exist

magento2magento2.3.2magento2.3.4

While migrating the Magento version from 2.3.4 to 2.3.2.

I am facing below issues while navigating to Product page.

Error: Class Magento\Catalog\Model\Product\Attribute\Backend\LayoutUpdate does not exist

In admin panel, when editing the products getting the below error

Error: Product does not exists"

Best Answer

The issue is in your database

I noticed in Magento 2.3.4, they created the LayoutUpdate file with the attributes custom_layout_update_file.

When we revert back, the attribute calling the file and cause the issue.

solution: Go to your Database and search the table eav_attribute

Run below query

SELECT * FROM `eav_attribute` WHERE `attribute_code` LIKE 'custom_layout_update_file'

You will find two records and just remove them (if you using Magento 2.3.2).

If you have redis, you will need to flush the cache from it.

redis-cli flushall;

Related Solutions

Magento – Magento 2 Class does not exist error

To create a custom grid in the admin panel is necessary add this code in /etc/di.xml to specify the collection.

<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
    <virtualType name="Namespace\Module\Model\ResourceModel\YourModel\Grid\Collection" type="Magento\Framework\View\Element\UiComponent\DataProvider\SearchResult">
        <arguments>
            <argument name="mainTable" xsi:type="string">your_main_table</argument>
            <argument name="resourceModel" xsi:type="string">Namespace\Module\Model\ResourceModel\YourResourceModel</argument>
        </arguments>
    </virtualType>
    <type name="Magento\Framework\View\Element\UiComponent\DataProvider\CollectionFactory">
        <arguments>
            <argument name="collections" xsi:type="array">
                <!--data provider name which used in grid ui component file -->
                <item name="paid_listing_data_source" xsi:type="string">Namespace\Module\Model\ResourceModel\YourModel\Grid\Collection</item>
            </argument>
        </arguments>
    </type>
</config>

You can see how your provider data specified paid_listing.paid_listing_data_source is specified in the second type with your grid collection.

Magento2 – Fix Error: Class PbuploadMediaGridDataProvider Does Not Exist

The dataProvider class must be an existing class.

In your case you used PbuploadMediaGridDataProvider. I assumed that you based on development on what Magento does out of the box.

However, most of the time M2 uses a virtual type for the data provider classes.

I also assume that you want to use your Pinkblue\CatalogUpload\Model\ResourceModel\Media\Grid\Collection as the data provider.

To implement that you can add the following to your di.xml or create it :

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
    <virtualType name="PbuploadMediaGridCollectionFactoryForReporting" type="Magento\Framework\View\Element\UiComponent\DataProvider\CollectionFactory">
        <arguments>
            <argument name="collections" xsi:type="array">
                <item name="pbupload_media_listing_data_source" xsi:type="string">Pinkblue\CatalogUpload\Model\ResourceModel\Media\Grid\Collection</item>
            </argument>
        </arguments>
    </virtualType>

    <virtualType name="PbuploadMediaGridReporting" type="Magento\Framework\View\Element\UiComponent\DataProvider\Reporting">
        <arguments>
            <argument name="collectionFactory" xsi:type="object">PbuploadMediaGridCollectionFactoryForReporting</argument>
        </arguments>
    </virtualType>

    <virtualType name="PbuploadMediaGridDataProvider" type="Magento\Framework\View\Element\UiComponent\DataProvider\DataProvider">
        <arguments>
            <argument name="reporting" xsi:type="object">PbuploadMediaGridReporting</argument>
        </arguments>
    </virtualType>
</config>

Best Answer

Related Solutions

Magento – Magento 2 Class does not exist error

Magento2 – Fix Error: Class PbuploadMediaGridDataProvider Does Not Exist

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