fix bug

core/models.py

@@ -82,10 +82,16 @@ class CrawlTask(models.Model):
     
     def get_websites_display(self):
         """获取网站列表的显示文本"""
-        websites = self.websites.all()
-        if not websites:
+        try:
+            websites = self.websites.all()
+            if not websites:
+                return "所有网站"
+            # 确保网站名称是字符串并可以被join处理
+            website_names = [str(w.name) for w in websites if w.name]
+            return ", ".join(website_names) if website_names else "所有网站"
+        except Exception:
+            # 如果出现任何异常，返回默认值
             return "所有网站"
-        return ", ".join([w.name for w in websites])
     
     def get_duration(self):
         """获取任务执行时长"""