php - laravel 中的 Auth 类如何知道要与哪个表比较数据？以及要检查哪些字段？

Question

我想在 Laravel 中实现我自己的身份验证系统，而不是使用默认的，所以我正在经历 THIS教程。它使用 laravel-4，因此显然某些代码会发生变化。下面是对用户进行身份验证的代码片段，请参见下文:

// app/controllers/HomeController.php<


public function doLogin() {
// validate the info, create rules for the inputs
$rules = array(
    'email'    => 'required|email', // make sure the email is an actual email
    'password' => 'required|alphaNum|min:3' // password can only be alphanumeric and has to be greater than 3 characters
);

// run the validation rules on the inputs from the form
$validator = Validator::make(Input::all(), $rules);

// if the validator fails, redirect back to the form
if ($validator->fails()) {
    return Redirect::to('login')
        ->withErrors($validator) // send back all errors to the login form
        ->withInput(Input::except('password')); // send back the input (not the password) so that we can repopulate the form
} else {

        // create our user data for the authentication
        $userdata = array(
            'email'     => Input::get('email'),
            'password'  => Input::get('password')
        );

        // attempt to do the login
        if (Auth::attempt($userdata)) {

            // validation successful!
            // redirect them to the secure section or whatever
            // return Redirect::to('secure');
            // for now we'll just echo success (even though echoing in a controller is bad)
            echo 'SUCCESS!';

        } else {        

            // validation not successful, send back to form 
            return Redirect::to('login');

        }
    }
}

我不太明白下面这行代码:

if (Auth::attempt($userdata)) {

Auth 类如何知道要查找哪个表并比较数据？另外它如何知道要与哪些字段进行比较？这有点令人困惑。有人可以解释一下吗？

INTRO 的 auth 类对我理解 Auth 类的工作原理非常有帮助，但我仍然没有完全得到上述问题的答案。

Answer 1

Laravel 通过 config/auth.php 知道这一点，在 Laravel 4 中你应该有这样的东西:

/*
    |--------------------------------------------------------------------------
    | Authentication Model
    |--------------------------------------------------------------------------
    |
    | When using the "Eloquent" authentication driver, we need to know which
    | Eloquent model should be used to retrieve your users. Of course, it
    | is often just the "User" model but you may use whatever you like.
    |
    */

    'model' => 'User',

    /*
    |--------------------------------------------------------------------------
    | Authentication Table
    |--------------------------------------------------------------------------
    |
    | When using the "Database" authentication driver, we need to know which
    | table should be used to retrieve your users. We have chosen a basic
    | default value but you may easily change it to any table you like.
    |
    */

    'table' => 'users',

用户名是硬编码的，但是，如果您需要，您应该能够通过将此方法添加到您的用户模型中进行更改:

public function username()
{
    return 'username';
}