Filter the orderby of entries retrieved from database

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  • September 1, 2018 at 4:14 AM #11199
    Resolved Content Pilot
    Participant

    Is there a way to filter the orderby parameter once I have retrieved a set of entries?

    In the class MB_Relationships_Query, on line 60 sets the orderby parameter, but I need to change it for my use case, sorting all posts by date descending, not by how they were added in the backend. I could change them by hand but the client is updating the site in the future and needs a fool-proof solution.

    Thanks for the help.

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  • September 1, 2018 at 3:13 PM #11218
    Anh Tran
    Keymaster

    Hi Juanita,

    You can overwrite the orderby parameter with this code:

    add_filter( 'posts_clauses', function( $clauses, $query ) {
    $relationship = $query->get( 'relationship' );
    if ( ! $relationship || 'REL_ID' != $relationship['id'] ) ) {
        return $clauses;
    }
    $clauses['orderby'] = 'ORDER BY post_date DESC';
    return $clauses;
}, 99, 2 );

    It overwrites the orderby in the query. You might change it to fit your needs.

    September 7, 2018 at 1:39 AM #11270
    Content Pilot
    Participant

    The function needs to be altered a little bit for anyone else looking to do the same thing. Only change was to remove ORDER BY in the new SQL statement.

    
add_filter( 'posts_clauses', 'mb_sort', 99, 2 );
/**
 * Sort just the POST relationship by date DESC.
 *
 * @param array $clauses Existing clauses.
 * @param WP_Query $query Main Query.
 * @return array
 */
function mb_sort( $clauses, $query ) {

    $relationship = $query->get( 'relationship' );
    
    if ( ! $relationship || 'REL_ID' !== $relationship['id'] ) {
            return $clauses;
    }
    
    $clauses['orderby'] = 'post_date DESC';
    
    return $clauses;
    
}
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