I've built an admin grid following a few tutorials and hit this error:

Warning: Invalid argument supplied for foreach() in /home/sadmin/mage/lib/internal/Magento/Framework/View/Element/UiComponent/DataProvider/DataProvider.php on line 253

I went to the file and saw this function:

protected function searchResultToOutput(SearchResultInterface $searchResult)
    $arrItems = [];

    $arrItems['items'] = [];
    foreach ($searchResult->getItems() as $item) {
        $itemData = [];
        foreach ($item->getCustomAttributes() as $attribute) {
            $itemData[$attribute->getAttributeCode()] = $attribute->getValue();
        $arrItems['items'][] = $itemData;

    $arrItems['totalRecords'] = $searchResult->getTotalCount();

    return $arrItems;

for my data, there are no custom attributes, so how do I bypass this part of the function for my grid to load? Var_dumping my $searchResult->getItems() shows my table data so I'm not sure why this is needed, any help or explanations are much appreciated :)


  • 4
    I got the same issue in one of my custom modules and found out that my [Vendor]\[Module]\Model\ResourceModel\[Module]\Grid\Collection::__constructor had called its' parent below this line $this->_init($model, $resourceModel); Then I moved the parent::__constructor to the top and issue got fixed. public function __construct( \Magento\Framework\Data\Collection\EntityFactoryInterface $entityFactory, \Psr\Log\LoggerInterface $logger, \Magento\Framework\Data\Collection\Db\FetchStrategyInterface $fetchStrategy, \Magento\Framework\Event\ManagerInterface $eventManager, \Magento\Store\Model\Store
    – rukrlf
    Oct 31, 2018 at 12:40
  • Did you find an answer?
    – Daniel
    Sep 17, 2019 at 11:46
  • @Daniel unfortunately not from what I remember, think I went for a completely different approach entirely - though unfortunately, that project was closed so the code is not there :/ if someone has it on their machines I might be able to get the answer out and post, but that's a big if I'm afraid :/
    – treyBake
    Sep 17, 2019 at 11:54
  • For me it was an issue with the declaration of the <virtualType> in di.xml. So I guess when a wrong dataProvider is passed to the UiComponent it leads to this error. $searchResult->getItems() the items where actual model instances instead of DataProvider/Model instances. I don't think that's enough for an answer but I hope this comment helps.
    – Daniel
    Sep 17, 2019 at 13:16
  • 1
    @Daniel oo add it as answer if it's a good one^ might help some future visitor :)
    – treyBake
    Sep 17, 2019 at 13:17

2 Answers 2


In my case the error occurred due to an wrong declaration of the <virtualType> in the di.xml.

The <virtualType> for the dataProvider can be declared the following:

<virtualType name="[Vendor]\[Module]\Model\ResourceModel\[Model]\Grid\Collection"
        <argument name="mainTable" xsi:type="string">main_table</argument>
        <argument name="resourceModel" xsi:type="string">[Vendor]\[Module]\Model\ResourceModel\[Model]</argument>

On the name attribute of the <virtualType> I provided the wrong path to the Collection. Fixing the path did solve the problem with the error and the grid is displayed.

Due to the wrong declaration, the $searchResult->getItems() returned an array of [Vendor]/[Module]/Model/[Model] instead of an array containing Magento\Framework\View\Element\UiComponent\DataProvider\[Model] instances.


In my case, I needed to pass the object Magento\Framework\View\Element\UiComponent\DataProvider\Document to the custom collection class.

//di.xml file

    <type name="YourVendor\Example\Model\ResourceModel\ExampleTable\Grid\Collection">
            <argument name="mainTable" xsi:type="string">example_post</argument>
            <argument name="eventPrefix" xsi:type="string">blog_post_grid_collection</argument>
            <argument name="eventObject" xsi:type="string">blog_post_object_grid_collection</argument>
            <argument name="resourceModel" xsi:type="string">YourVendor\Example\Model\ResourceModel\ExampleResource</argument>
            <argument name="model" xsi:type="string">Magento\Framework\View\Element\UiComponent\DataProvider\Document</argument>

The object Document converts the data in the format as shown in the image. This data is returned by the method $item->getCustomAttributes()

enter image description here

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