/www/wwwroot/bbs7.cn/vendor/illuminate/database/Eloquent/Model.php:1344<br>Call to a member function connection() on null

/www/wwwroot/bbs7.cn/vendor/illuminate/database/Eloquent/Model.php:1344<br>Call to a member function connection() on null/www/wwwroot/bbs7.cn/vendor/illuminate/database/Eloquent/Model.php:1344
Call to a member function connection() on null