Fixes incorrect thumbnail image displayed for attachments

includes/main-query.php

@@ -252,7 +252,7 @@ function get_crp( $args = array() ) {
  * @since 1.9
  *
  * @param array $args Arguments array.
- * @return object $results
+ * @return object $results Array of related post objects
  */
 function get_crp_posts_id( $args = array() ) {
 	global $wpdb, $post, $crp_settings;
@@ -452,7 +452,7 @@ function get_crp_posts_id( $args = array() ) {
 		$where  = $match;
 		$where .= $now_clause;
 		$where .= $from_clause;
-		$where .= " AND $wpdb->posts.post_status = 'publish' ";                 // Only show published posts.
+		$where .= " AND $wpdb->posts.post_status IN ('publish','inherit') "; // Only show published posts or attachments.
 		$where .= $wpdb->prepare( " AND {$wpdb->posts}.ID != %d ", $source_post->ID );  // Don't include the current ID.
 
 		if ( isset( $args['same_author'] ) && $args['same_author'] ) {

includes/media.php

@@ -101,7 +101,9 @@ function crp_get_the_post_thumbnail( $args = array() ) {
 	// If there is no thumbnail found, check the post thumbnail.
 	if ( ! $postimage ) {
 		if ( false !== get_post_thumbnail_id( $result->ID ) ) {
-			$postthumb = wp_get_attachment_image_src( get_post_thumbnail_id( $result->ID ), array( $args['thumb_width'], $args['thumb_height'] ) );
+			$attachment_id = ( 'attachment' === $result->post_type ) ? $result->ID : get_post_thumbnail_id( $result->ID );
+
+			$postthumb = wp_get_attachment_image_src( $attachment_id, array( $args['thumb_width'], $args['thumb_height'] ) );
 			$postimage = $postthumb[0];
 		}
 		$pick = 'featured';

readme.txt

@@ -185,6 +185,7 @@ You can insert the related posts anywhere in your post using the `[crp]` shortco
 	* Selecting date order now orders the related posts by newest first
     * Fixed PHP warning in the widget
     * Stop using `current_time( 'timestamp' )`
+    * Fixes incorrect thumbnail image displayed for attachments in the related posts list
 
 = Earlier versions =