消息列表返回封面图

app/enterprise/controller/Posts.php

@@ -600,6 +600,7 @@ class Posts extends BaseController
                 // 第一张图 或是视频
                 $fileWhere = [
                     'posts_id' => $item['posts_id'],
+                    'type' => 1,
                     'delete_time' => 0
                 ];
                 $files = PostsFile::where($fileWhere)