* [refac] filter empty value.

lib/base/mao/mao.class.php

@@ -565,7 +565,7 @@ class baseMao
                 if(is_string($value))  $value = explode(',', str_replace(' ', '', $value));
                 if(is_array($value))
                 {
-                    $rawResult = $this->cache->fetchAll($this->table, $value);
+                    $rawResult = $this->cache->fetchAll($this->table, array_filter($value));
                     break;
                 }
             }

lib/cache/cache.class.php

@@ -653,7 +653,11 @@ class cache
         if(empty($objectIdList)) $objectIdList = $allObjectIdList;
 
         $keys = [];
-        foreach($objectIdList as $objectID) $keys[$objectID] = $this->getRawCacheKey($code, $objectID);
+        foreach($objectIdList as $objectID)
+        {
+            if(!$objectID) continue;
+            $keys[$objectID] = $this->getRawCacheKey($code, $objectID);
+        }
 
         $objects = $this->cache->getMultiple(array_values($keys));