Query posts by a type and another type only if post is in specific category

Question

I have a featured post type and a reviews post type. I would like to include reviews of a certain category (I use categories from the posts type) as well. How could query args be crafted?

A crude example:

get_posts(array('post_type' => array('featured-posts', array('review-posts', 'featured-category'))

Need to fetch all the posts in the featured-posts type, also all the posts in the review-posts type if the assigned category is feature-category.

UPDATE: Ended up not needing to implement this but I think Stephen S had the best guess.

Answer 1

Untested, but I think you'd need to do two separate queries and merge them together:

$args = array(
 'post_type' => 'featured-posts'
);
$featured_posts = get_posts($args);

$args = array(
 'post_type' => 'review-posts',
 'category_name' => 'featured-category'
);
$review_posts = get_posts($args);

$result = array_merge($featured_posts->posts, $review_posts->posts);

$final_query = WP_Query($result);

Answer 2

Have you tried doing a query on both post types and including the category? I suspect that it will look only for posts in the featured category, then limit by the two post types, but nonetheless it's worth a try.

$args = array(
    'post_type' => array( 'featured-posts', 'review-posts' ),
    'category_name' => 'featured-category'
);
$res_posts = get_posts($args);

You can always try playing with taxonomy parameters (tax_query) as well.