Written by Admin on 2025-05-06

How to Fix Search and Filter Null Set Showing Wrong Post Types Issue in WordPress

If you are operating a WordPress website with different post types, you might have encountered an issue when using search and filter plugins. The problem is that the search and filter function shows a null set or incorrect post types. This can be frustrating for users, as they cannot find the content they are looking for. In this article, we will explore the causes of this issue and provide a step-by-step guide on how to fix it.

Causes of the Search and Filter Null Set Showing Wrong Post Types Issue

The search and filter null set showing wrong post types issue usually occurs due to a conflict between the search and filter plugin and the WordPress core function. The function responsible for the search and filter is the WP_Query class, which is used to retrieve posts from the WordPress database. Some plugins or themes modify this class, which can cause the search and filter function to malfunction.

Another reason for the issue is the incorrect use of the search and filter plugin settings. Many plugins have advanced settings that allow users to customize the post types that will be shown in the search results. If the settings are not configured correctly, the plugin will not be able to retrieve the correct post types.

How to Fix the Search and Filter Null Set Showing Wrong Post Types Issue

Here are the steps you can follow to fix the search and filter null set showing wrong post types issue:

1. Check the Plugin Settings

The first thing you should do is check the settings of the search and filter plugin you are using. Make sure that the post types you want to display in the search results are selected. Some plugins allow you to exclude certain post types from the search results. If this is the case, make sure that the post types you want to see are not excluded.

2. Disable Other Plugins and Themes

If the issue persists, try disabling other plugins and switching to a default WordPress theme. This will help you determine if the problem is caused by a conflict between the search and filter plugin and another plugin or theme. If the issue is resolved by disabling another plugin or theme, you can contact the plugin or theme developer for further assistance.

3. Modify the Query Settings

If the issue persists, you can modify the query settings to retrieve the correct post types. You can do this by adding a filter to the WordPress functions.php file. Here is an example code snippet that can be added to filter the query:

php function modify_search_query($query) { if ($query->is_search() && $query->is_main_query()) { $query->set('post_type', array('post', 'page', 'custom_post_type')); } } add_action('pre_get_posts', 'modify_search_query');

Replace custom_post_type with the name of the post type you want to display in the search results.

4. Update Plugins and Themes

Finally, make sure that all your plugins and themes are up to date. Developers release updates to fix bugs and conflicts, so updating your plugins and themes can resolve the search and filter null set showing wrong post types issue.

Conclusion

The search and filter null set showing wrong post types issue is a common problem that can be fixed easily in WordPress. By checking the plugin settings, disabling other plugins and themes, modifying the query settings, and updating your plugins and themes, you can ensure that your users can find the content they are looking for.