Magento 2 – Multi-Select Filter for Admin Grid

By default Magento2 not include js for dropdown.So override and use product_listing.xml in your module and add your column class for category options.( for format : see status)

Path:

<vendor>/<module>view/adminhtml/ui_component/product/product_listing.xml

and use below code :-

<?xml version="1.0" encoding="UTF-8"?>
<listing xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Ui:etc/ui_configuration.xsd">
  <listingToolbar name="listing_top">     
    <filters name="listing_filters">
            <argument name="data" xsi:type="array">
                <item name="config" xsi:type="array">
                    <item name="templates" xsi:type="array">
                        <item name="filters" xsi:type="array">
                            <item name="select" xsi:type="array">
                                <item name="component" xsi:type="string">Magento_Ui/js/form/element/ui-select</item>
                                <item name="template" xsi:type="string">ui/grid/filters/elements/ui-select</item>
                            </item>
                        </item>
                    </item>
                </item>
            </argument>
    </filters>
</listingToolbar>
    <columns name="product_columns" class="Magento\Catalog\Ui\Component\Listing\Columns">
        <column name="category_ids" class="<VENDOR><MODULE_NAME>\Ui\Component\Listing\Column\Category">
            <argument name="data" xsi:type="array">
               <item name="options" xsi:type="object"><VENDOR><MODULE_NAME>\Model\Category\Categorylist</item>
                <item name="config" xsi:type="array">
                   <item name="filter" xsi:type="string">select</item>
                    <item name="add_field" xsi:type="boolean">true</item>
                    <item name="dataType" xsi:type="string">select</item>
                    <item name="label" xsi:type="string" translate="true">Categories</item>
                    <item name="sortOrder" xsi:type="number">100</item>
                </item>
            </argument>
        </column>
     </columns>
</listing>

Yes, I find out the \Magento\Framework\Api\Search\FilterGroupBuilder have setFilters function to give array of multiple filters.

so, i change my code

foreach($filter as $fil)
     {
           $this->_logger->addDebug("array filter group  loop" ."\n");
           $filter_group[$filter_group_loop] = $this->_filterGroupBuilder->addFilter($fil)->create();    //->addFilter($fil)->create();
           $filter_group_loop++;
       }

to :

$filter_group[$filter_group_loop] = $this->_filterGroupBuilder->setFilters($filter)->create();    //->addFilter($fil)->create();

Now, create Multiple Filters to Single Filter Group.