I used this semi-official plugin to enable API call.
But I can't find a way to exclude category. For example if I have mysite.com/wp-json/wp/v2/posts?filter[category__not_in]=10, it will ignores the filter and show all latest posts.
Is there a way to exclude category from the API call?
With the Rest API some filters are available only for logged in users:
In addition, the following are available when authenticated as a user with
edit_posts:[...]
category__not_in
This is taken from the Rest API 1.0 documentation.
What that mean is you need to logged in as an editor (user with edit_posts capability). For doing this in a clean way, I suggest create a minimal role for REST user with only the capabilities you need, something like this:
add_role(
'rest_user',
__( 'REST User' ),
array(
'read' => true,
'edit_posts' => true,
'delete_posts' => false
)
);
Then do your query as authenticated user with the following:
$response = wp_remote_request('http://example.com/wp-json/wp/v2/posts?filter[category__not_in]=10', array(
'method' => 'GET',
'headers' => array(
'Authorization' => 'Basic ' . base64_encode('login:password')
)
));
Thanks to this article you shared, it seems you need to declare the filter name as query var, so in this case:
add_filter('query_vars', function($query_vars) {
$query_vars[] = 'category__not_in';
return $query_vars;
});
Which make sense because Wordpress is droping any GET parameter that isn't declare, though I don't understand why all the filters are not declared as query vars inside the WP Core...
For WP API V2 use a minus sign, for example:
http://yourwpwebsite/wp-json/wp/v2/posts/&filter[cat]=1,2,-3
will retrieve all posts in categories with id= 1 and id = 2 but excluding any posts in category with id= 3
