:bug: fixing the exhibition meta key | #140

plugins/cia-endpoints/includes/formats.php

     $filtered[hero] = get_post_meta( $item->ID, 'hero_header', true );
 
     // Materials + type endpoints
-    $posts_with_type = ['artist', 'exhbition', 'event'];
+    $posts_with_type = ['artist', 'exhibition', 'event'];
     if( in_array($item->post_type, $posts_with_type) ) {
         $filtered[materials] = make_taxonomy_endpoint_for(get_the_terms( $item, 'material'));
         $filtered[subtypes] = make_taxonomy_endpoint_for(get_the_terms( $item, $item->post_type . '_type' ));
 
     if($item->post_type === 'artist') $filtered[sortname] = get_post_meta( $item->ID, 'artist-sort-name', true );
 
-    $posts_with_date = ['exhbition', 'event'];
+    $posts_with_date = ['exhibition', 'event'];
     if( in_array($item->post_type, $posts_with_date) ) {
-        $filtered[start] = get_post_meta($item->ID, $item->post_type . '-start-time', true);
-        $filtered[end] = get_post_meta($item->ID, $item->post_type . '-end-time', true);
+        $key_prefix = $item->post_type;
+        $key_suffix = 'time';
+        // Exhibition meta key is very old so we change it back to exhibit
+        if($item->post_type == 'exhibition') { 
+            $key_prefix = 'exhibit';
+            $key_suffix = 'date';
+        }
+        $filtered[start] = get_post_meta($item->ID, $key_prefix . '-start-' . $key_suffix, true);
+        $filtered[end] = get_post_meta($item->ID, $key_prefix . '-end-' . $key_suffix, true);
         $filtered[current] = time() <= (int)$filtered[end] && time() >= (int)$filtered[start];
     }