Filtering grid by using filter_url_params is not working

Question

I added a grid to a ui_component form and I want to use an Url-parameter to filter the content of the grid. Herefore I added the 'filter_url_params' in my listing:

    <dataSource name="mcas_covertemplate_graphicelement_listing_data_source">
    <argument name="dataProvider" xsi:type="configurableObject">
        <argument name="class" xsi:type="string">Magento\Framework\View\Element\UiComponent\DataProvider\DataProvider</argument>
        <argument name="name" xsi:type="string">mcas_covertemplate_graphicelement_listing_data_source</argument>
        <argument name="primaryFieldName" xsi:type="string">graphicelement_id</argument>
        <argument name="requestFieldName" xsi:type="string">id</argument>
        <argument name="data" xsi:type="array">
            <item name="config" xsi:type="array">
                <item name="component" xsi:type="string">Magento_Ui/js/grid/provider</item>
                <item name="update_url" xsi:type="url" path="mui/index/render"/>
                <item name="filter_url_params" xsi:type="array">
                    <item name="cover_id" xsi:type="string">*</item>
                </item>
                <item name="storageConfig" xsi:type="array">
                    <item name="indexField" xsi:type="string">graphicelement_id</item>
                </item>
            </item>
        </argument>
    </argument>
</dataSource>

The cover_id is visible in my Url, but it is not used to set the filter. If I set a value for the cover_id manually it works.

What I am doing wrong?

Answer 1

In order to help the Magento 2 Community I have pushed a simple repository here https://bitbucket.org/shinedev/helpdesk-stackexchange/ it could be cloned and the it could be edited.

You can install this little sample in your Magento 2.3.x store and click at the Helpdesk button in the menu.

The Aim is understanding how to nest a listing grid created by the new UIComponent within a UiComponent form.

At the moment I have succedeed to get the ticket_id by a simple session variable but this is not the main aim and it is not a good workaround too. I would like to understand how Magento 2 developers pass the data from one to another UIComponent.

Furthermore I have already explained here https://magento.stackexchange.com/a/306136/2004 how this thread is really popular at the Magento Community.