How to filter by date & a specific custom post type post-WP 4.4?

Question

WordPress 4.4 introduced the ability to display date archives by appending /?post_type=custom_post_type to the end of the date url. i.e. localhost/2016/02/?post_type=news.

I had assumed I could do: if( is_post_type_archive('news) && is_date())...

But from what I can discern:

• is_date() will only detect if the page is displaying a year/month/day archive & is_date() applies to all CPT date archives as well

• is_archive() applies to all archive pages

• is_post_type_archive('CPT') will only apply to the archive page and filters out date archives

I'm trying to output a menu on the news date archive pages to display separately from the blog date archive pages.

Answer 1

There is no logical explanation why if( is_post_type_archive('news) && is_date()) should fail and not work in your situation.

• is_date() return true on all date archives

• is_post_type_archive( 'news' ) will return true on post type archives

When you visit localhost/2016/02/?post_type=news, both of those ring true, and they will only ring true on that specific URL

If it it fails, you have something breaking your main query, maybe a bad pre_get_posts action or you are using query_posts somewhere on the page which will break the main query object. You should do var_dump( $wp_query ) and inspect the main query object. Specially look at $query property