Display posts with 'Product' type ordered by 'Price' custom field:
$query = new WP_Query(
array ( 'post_type' => 'product',
'orderby' => 'meta_value',
'meta_key' => 'price' )
);
Which code should I use if also want to order by 'Size'?
Another example on which I need multiple sort on custom fields:
Display posts with 'Event' type ordered by 'Start_Hour' and then by 'Start_Minute'.
Thanks to Bainternet I found the solution:
function orderbyreplace($orderby) {
return str_replace('menu_order', 'mt1.meta_value, mt2.meta_value', $orderby);
}
and...
$args = array(
'post_type'=>'Events',
'orderby' => 'menu_order',
'order' => 'ASC',
'meta_query' => array(
array(
'key' => 'Start_Hour',
'value' => '',
'compare' => 'LIKE'
),
array(
'key' => 'Start_Minute',
'value' => '',
'compare' => 'LIKE'
)
)
);
add_filter('posts_orderby','orderbyreplace');
$loop = new WP_Query( $args );
remove_filter('posts_orderby','orderbyreplace');
SELECT SQL_CALC_FOUND_ROWS zmw_posts.ID FROM I think this changed slightly in Wordpress 3.7.
I had to change
return str_replace('menu_order', 'mt2.meta_value, mt1.meta_value', $orderby);
into
return str_replace('wp_posts.menu_order', 'mt2.meta_value, mt1.meta_value', $orderby);
Thanks for the initial solution! [Edited]
Here's an example of using more than one meta_key and orderby that I believe should work:
$params = array(
'post_type' => 'product',
'meta_query' => array(
array(
'key' => 'price',
'value' => '',
'compare' => 'LIKE'
),
array(
'key' => 'size',
'value' => '',
'compare' => 'LIKE'
)
),
'orderby' => 'price size',
'order' => 'ASC'
);
$query = new WP_Query;
$resulting_obj = $query->query($params);
You'll need to play with the meta_query items a bit more, especially the 'value' parameter. Please have a good look at http://codex.wordpress.org/Class_Reference/WP_Query in the 'Custom Field Parameters' section.
You don't need any filter or hooks to sort multiple custom fields, if your one of custom field is meta_key and other one is normal column of table, than use these parameters/arguments in your query.
'meta_key' => 'KEY_NAME',
'orderby' => 'meta_value_num SECOND_COLUMN_NAME',
'order' => 'ASC' or 'order' => 'DESC'
Here the order of meta_value_num and SECOND_COLUMN_NAME matter, you may see different-2 result based on the order.
KEY_NAME only. The only way this orderby will function is if SECOND_COLUMN_NAME is not a custom field, which fails to answer this questions.