Hello,

I searched a while how to add a sortable custom column (for me : property_unique_id) in the edit posts property listing dashboard.

Below, my first try, and then, my code which almost works

if(false) { /* NOT WORKS, SEE BELOW */

/* Adding Sortable Column in Dashboard | Source (inspiration) : https://gist.github.com/ethanhinson/7419385 */

function property_id_column_register( $columns ) {
    // Insert property ID in between date/title
    $last = array_pop($columns);
    $columns['property_unique_id'] = 'Réf';
    $columns[strtolower($last)] = $last;
    var_dump($columns);
    return $columns;
    
}
add_filter( 'manage_property_posts_columns', 'property_id_column_register' );

function property_id_column_display( $column_name, $post_id ) {
 echo 'REF';
    if ( 'property_unique_id' != $column_name )
        return;
    $property_unique_id = get_post_meta($post_id, 'property_unique_id', true);
  
    if ( !$property_unique_id )
        $property_unique_id = '<em>No ID entered!</em>';
    echo $property_unique_id;
}
add_action( 'manage_property_posts_custom_column', 'property_id_column_display', 10, 2 );

// Register the column as sortable
function property_id_column_register_sortable( $columns ) {
    $columns['property_unique_id'] = 'property_unique_id';
    return $columns;
}
add_filter( 'manage_edit-property_sortable_columns', 'property_id_column_register_sortable' );

// Make our sorting work
function property_id_column_orderby( $vars ) {
    if ( isset( $vars['orderby'] ) && 'property_unique_id' == $vars['orderby'] ) {
        $vars = array_merge( $vars, array(
            'meta_key' => 'property_unique_id',
            'orderby' => 'meta_value'
        ) );
    }
 
    return $vars;
}
add_filter( 'request', 'property_id_column_orderby' );

}

// FROM HERE IT WORKS !!!

/* Show a custom column in the dashboard property listing (a suggestion of @MisterWordPress, it [almost] works)  */

// Add the column heading
function epl_manage_property_columns_heading_custom( $columns ) {
    $columns['property_unique_id']	= __('Property ID', 'easy-property-listings' );
    return $columns;
}
add_filter( 'manage_edit-property_columns', 'epl_manage_property_columns_heading_custom' );

// Put the value inside
function property_id_column_display( $column_name, $post_id ) {
    if ( 'property_unique_id' != $column_name )
        return;
    $property_unique_id = get_post_meta($post_id, 'property_unique_id', true);
  
    if ( !$property_unique_id )
        $property_unique_id = '<em>No ID entered!</em>';
    echo $property_unique_id;
}
add_action( 'manage_property_posts_custom_column', 'property_id_column_display', 10, 2 );

// Make it sortable
function epl_manage_listings_sortable_columns_custom( $columns ) {
	$columns['property_unique_id']	= 'property_unique_id';
	return $columns;
}
add_filter( 'manage_edit-property_sortable_columns', 'epl_manage_listings_sortable_columns_custom');

My only one concern is that my sortable column do not sort properly. It sort by something, but not by my property_unique_id… :-)) any idea to share ?