I am just trying to add an extra filter of category on the product grid page. After following the method given here - https://chillydraji.wordpress.com/2016/11/29/add-category-filter-to-product-grid-in-magento2/comment-page-1/#comment-626 I can see a new column in my product grid containing categories in it. But from the filter box when i select any category from the dropdown and press apply filter button, an error is coming – "Invalid attribute name: category_id".
Can anyone please let me know what I am doing wrong here.
