Made chapter meta queries more resilient

chapters.php

@@ -34,8 +34,17 @@ $query_args = array (
   'order' => $order,
   'paged' => $page,
   'posts_per_page' => get_option( 'posts_per_page', 8 ),
-  'meta_key' => 'fictioneer_chapter_hidden',
-  'meta_value' => '0'
+  'meta_query' => array(
+    'relation' => 'OR',
+    array(
+      'key' => 'fictioneer_chapter_hidden',
+      'value' => '0'
+    ),
+    array(
+      'key' => 'fictioneer_chapter_hidden',
+      'compare' => 'NOT EXISTS'
+    )
+  )
 );
 
 // Append date query (if any)

includes/functions/users/_follows.php

@@ -265,10 +265,16 @@ if ( ! function_exists( 'fictioneer_query_followed_chapters' ) ) {
           'value' => $story_ids,
           'compare' => 'IN',
         ),
+        array(
+          'relation' => 'OR',
           array(
             'key' => 'fictioneer_chapter_hidden',
-          'value' => 0,
-          'compare' => '=',
+            'value' => '0'
+          ),
+          array(
+            'key' => 'fictioneer_chapter_hidden',
+            'compare' => 'NOT EXISTS'
+          )
         )
       ),
       'numberposts' => $count,