カスタムエンドポイントの追加は非常に簡単です。
また、URLを次のように変更しました
http://example.com/wp-json/namespace/v2/posts?filter[meta_value][month]=12&filter[meta_value][year]=2015
function wp_json_namespace_v2__init()
{
// create json-api endpoint
add_action('rest_api_init', function () {
// http://example.com/wp-json/namespace/v2/posts?filter[meta_value][month]=12&filter[meta_value][year]=2015
register_rest_route('namespace/v2', '/posts', array (
'methods' => 'GET',
'callback' => 'wp_json_namespace_v2__posts',
'permission_callback' => function (WP_REST_Request $request) {
return true;
}
));
});
// handle the request
function wp_json_namespace_v2__posts($request)
{
// json-api params
$parameters = $request->get_query_params();
// default search args
$args = array(
'post_type' => 'post',
'post_status' => 'publish',
'numberposts' => -1,
// limit to only ids
// 'fields' => 'ids',
);
// check the query and add valid items
if (isset($parameters['filter']['meta_value'])) {
foreach ($parameters['filter']['meta_value'] as $key => $value) {
switch ($key) {
case 'month':
if (is_numeric($value))
$args['monthnum'] = $value;
break;
case 'year':
if (is_numeric($value))
$args['year'] = $value;
break;
}
}
}
// run query
$posts = get_posts($args);
// return results
$data = array(
'success' => true,
'request' => $parameters,
'count' => count($posts),
'posts' => $posts,
);
return new WP_REST_Response($data, 200);
}
flush_rewrite_rules(true); // FIXME: <------- DONT LEAVE ME HERE
}
add_action('init', 'wp_json_namespace_v2__init');