WP REST API v2: Getting posts by post ids

Question

I'm trying to get all posts by ID's using WP REST API. As per the documentation, we can use filter to use WP Query arguments. Using this with posts end point returns all the posts.

http://demo.wp-api.org/wp-json/wp/v2/posts/?filter[posts__in]=470,469

Answer 1

For the v2 of WP REST API use this format-

http://demo.wp-api.org/wp-json/wp/v2/posts?include[]=470&include[]=469

If you want custom coding then,

You can retrieve single post by id like

http://demo.wp-api.org/wp-json/wp/v2/posts/?filter[p]=470

But as per support its will not work for multiple post.

https://github.com/WP-API/WP-API/issues/1368

So you can ran a loop and get one by one.

But for multiple you have to put an function

add_filter('rest_query_vars', 'custom_rest_query_vars');
function custom_rest_query_vars($query_vars) {
  $query_vars = array_merge( $query_vars,    array('post','post__in','type','id') );
  return $query_vars;
}

Then you have to run

+filter[post__in][]=470&filter[post__in][]=469