使用Auth :: loginUsingId（）进入Laravel时出现错误

Question

in registration form,when i am fetch data from HTML form and save data into database and then login into the system using Auth::loginUsingId($staff->id); then following error occur. can anyone help??

Argument 1 passed to Illuminate\Auth\Guard::login() must implement interface 
Illuminate\Auth\UserInterface, null given, called in 
/var/www/doctodoor2014/vendor/laravel/framework/src/Illuminate/Auth/Guard.php 

Answer 1

This method needs a user id as an argument. Are you sure that $staff->id is giving you just an integer (user id)? Try to var_dump($staff->id); , or dd($staff->id); , ( http://laravel.com/api/function-dd.html ) to see what you are getting back.

Auth::loginUsingId(1);