Modifying date filter on admin page for custom post type to link to custom field

Question

Apologies if a similar question has already been asked, but I can’t seem to find the exact functionality I am looking for.

Basically I have a custom post type (sermons) which has ‘recorded_date’ as a custom meta data field. What I would like to do is on the custom post admin page (where all posts are shown) is change the existing date filter action to filter by this ‘recorded_date’ field and not the post_date as it normally does. I’ve managed to change the date filter dropdown using the following:

add_filter('months_dropdown_results', 'custom_date_dropdown');
function custom_date_dropdown($months){
        global $wpdb;
        $months = $wpdb->get_results("SELECT DISTINCT YEAR( meta_value ) AS year, 
        MONTH(meta_value) AS month FROM wp_postmeta 
        WHERE meta_key = 'recorded_date' ORDER BY meta_value DESC");
        return $months;
}

Which works perfectly. But selecting any value and filtering filters against the post_date. Is there anyway I can intercept this behaviour and change the filter query to my own custom query? Or I am I better off removing the filter and adding a custom one from scratch?

Thanks for any help in advance.

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, , , grahamt 6 years 2015-05-29T07:49:33-05:00 0 Answers 74 views 0

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