Get all post IDs from current WP_Query – not just currently visible

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I want to get all post IDs from the current query. I know how to get all IDs of the current page using the following:

global $wp_query;
$post_ids = wp_list_pluck( $wp_query->posts, "ID" );

This will give me an array of all post IDs, but limited to the current page.

How can I get all IDs but not limited by 'posts_per_page'. (I don’t want to modify the query by changing ‘posts_per_page’.)

I know that there is already information available from the global $wp_query such as:

We will be displaying ” . $wp_query->query_vars['posts_per_page'] . ” posts per page if possible.

We need a total of ” . $wp_query->max_num_pages . ” pages to display the results.

Additional Details:

I am trying to get WooCommerce product IDs and hooking into the woocommerce_archive_description action to do this.

2 Answers
2

Slightly old post I know but I just hit this exact issue myself.

Given a main_query find all the post IDs for it not limited by pagination.

I have made this function to return all terms for the main wp_query.

/*
 * Get terms for a given wp_query no paging
 * */
function get_terms_for_current_posts($tax='post_tag',$the_wp_query=false){
    global $wp_query;
    // Use global WP_Query but option to override
    $q = $wp_query;
    if($the_wp_query){
        $q = $the_wp_query;
    }

    $q->query_vars['posts_per_page'] = 200;// setting -1 does not seem to work here?
    $q->query_vars['fields'] = 'ids';// I only want the post IDs
    $the_query = new WP_Query($q->query_vars);// get the posts
    // $the_query->posts is an array of all found post IDs
    // get all terms for the given array of post IDs
    $y = wp_get_object_terms( $the_query->posts, $tax );
    return $y;// array of term objects
}

Hope this helps you or someone else stumbling across this.

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