No problem. I updated my code :
$GLOBALS['my_query_filters'] = array(
'field_5cb6ef1f75209' => 'alcool',
);
// action
add_action('pre_get_posts', 'my_pre_get_posts', 10, 1);
function my_pre_get_posts( $query ) {
// bail early if is in admin
if( is_admin() ) return;
// get meta query
$meta_query = $query->get('meta_query');
// loop over filters
foreach( $GLOBALS['my_query_filters'] as $key => $name ) {
// continue if not found in url
if( empty($_GET[ $name ]) ) {
continue;
}
// get the value for this filter
// eg: http://www.website.com/events?city=melbourne,sydney
$value = explode(',', $_GET[ $name ]);
// append meta query
$meta_query = array(
array(
'key' => $name,
'value' => $value,
'compare' => 'IN',
)
);
}
// update meta query
$query->set('meta_query', $meta_query);
return;
}
But it doesn’t work. I don’t have any result when I select a checkbox filter. I think checkbox field is stored as serialized array, so I can not use the IN operator and array (if I select multiple checkbox filters).
I think I have to create a loop with an OR relation in my meta_query.
