fix bug

app/chain/search.py

@@ -30,8 +30,8 @@ class SearchChain(_ChainBase):
         # 未开启的站点不搜索
         indexer_sites = []
         for indexer in self.siteshelper.get_indexers():
-            if settings.INDEXER_SITES \
-                    and any([s in indexer.get("domain") for s in settings.INDEXER_SITES.split(',')]):
+            if not settings.INDEXER_SITES \
+                    or any([s in indexer.get("domain") for s in settings.INDEXER_SITES.split(',')]):
                 indexer_sites.append(indexer)
         if not indexer_sites:
             logger.warn('未开启任何有效站点，无法搜索资源')