fix没有数据时keyword为null

app/code/Joshine/Category/Observer/Frontend/Catalog/CategoryLoadAfter.php

@@ -44,10 +44,10 @@ class CategoryLoadAfter implements \Magento\Framework\Event\ObserverInterface
             $oldMetaKeyword = $category->getMetaKeywords();
             $category->setMetaTitle('Buy the Latest ' . $str['title'] .' on '.$this->url->getBaseUrl());
             $category->setMetaDescription('Shop ' . $str['title'] . '. ' . $oldMetaDescription);
-            if ($str['keyword']){
+            if ($str['keyword'] && $str['keyword'] != '.'){
                 $category->setMetaKeywords($str['keyword']);
             }else{
-                $category->setMetaKeywords($oldMetaKeyword.'.');
+                $category->setMetaKeywords($oldMetaKeyword);
             }
         }
     }
@@ -83,7 +83,7 @@ class CategoryLoadAfter implements \Magento\Framework\Event\ObserverInterface
             $arr['title'] .= $price .' ';
             $arr['keyword'] .= $price .' '. $categoryName.',';
         }
-
+        $arr['title'] = rtrim($arr['title'],' ');
         $arr['title'] .= $categoryName;
         $arr['keyword'] = rtrim($arr['keyword'],',') . '.';