如何将using Newtonsoft.Json;
using System;
namespace UsersJSON
{
public class UsersRepository
{
public User[] Users;
}
public class User
{
public int serialNo;
public UserDetails details;
}
public class UserDetails
{
public string name;
public string job;
}
class Program
{
static void Main(string[] args)
{
var json = @"{
users: [
{
serialNo: 1,
details: {name: 'John', job: 'Receptionist'}
},
{
serialNo: 2,
details: {name: 'Alan', job:'Salesman'}
}]
}";
var usersList = JsonConvert.DeserializeObject<UsersRepository>(json);
Console.WriteLine(usersList.Users[0].details.name); // prints "John"
Console.ReadLine();
}
}
}
添加到默认登录SQL查询中？
我的意思是默认情况下是
DESC。
如何添加
select * from users where name = user_name limit 1？
我知道name列应仅包含唯一值，我的登录系统有所不同（另一个表中有一些预定义用户），并且我需要使用相同名称进行多个用户注册。我只想登录数据库中的最后一条记录。请帮我如何在laravel中自定义模型提供程序？我不知道要修改哪些文件才能正常工作。
这是我的LoginController.php，但您可以忽略它（我添加了它，因为某些用户需要它），只需查看select * from users where name = user_name ORDER BY id DESC limit 1中的默认loginController
php artisan make:auth我的LoginController中的所有方法都覆盖<?php
namespace App\Http\Controllers\Auth;
use App\Http\Controllers\Controller;
use Illuminate\Foundation\Auth\AuthenticatesUsers;
use Illuminate\Http\Request;
use Illuminate\Validation\ValidationException;
use Illuminate\Support\Facades\Session;
class LoginController extends Controller
{
/*
|--------------------------------------------------------------------------
| Login Controller
|--------------------------------------------------------------------------
|
| This controller handles authenticating users for the application and
| redirecting them to your home screen. The controller uses a trait
| to conveniently provide its functionality to your applications.
|
*/
use AuthenticatesUsers;
/**
* Where to redirect users after login.
*
* @var string
*/
protected $redirectTo = '/home';
/**
* Create a new controller instance.
*
* @return void
*/
public function __construct()
{
$this->middleware('guest')->except('logout');
}
/**
* Check either username or email.
* @return string
*/
public function login(Request $request)
{
$this->validateLogin($request);
// If the class is using the ThrottlesLogins trait, we can automatically throttle
// the login attempts for this application. We'll key this by the username and
// the IP address of the client making these requests into this application.
if ($this->hasTooManyLoginAttempts($request)) {
$this->fireLockoutEvent($request);
return $this->sendLockoutResponse($request);
}
if ($this->attemptLogin($request)) {
return $this->sendLoginResponse($request);
}
// If the login attempt was unsuccessful we will increment the number of attempts
// to login and redirect the user back to the login form. Of course, when this
// user surpasses their maximum number of attempts they will get locked out.
$this->incrementLoginAttempts($request);
return $this->sendFailedLoginResponse($request);
}
public function username()
{
$identity = Session::get('table_id');
$fieldName = 'name';
request()->merge([$fieldName => $identity]);
return $fieldName;
}
/**
* Validate the user login.
* @param Request $request
*/
protected function validateLogin(Request $request)
{
$this->validate(
$request,
[
'password' => 'required|string',
],
[
'password.required' => 'Password is required',
]
);
}
/**
* @param Request $request
* @throws ValidationException
*/
protected function sendFailedLoginResponse(Request $request)
{
$request->session()->put('login_error', trans('auth.failed'));
throw ValidationException::withMessages(
[
'error' => [trans('auth.failed')],
]
);
}
protected function attemptLogin(Request $request)
{
$remember = true;
return $this->guard()->attempt(
$this->credentials($request), $remember
);
}
}
中的方法
答案 0 :(得分：2)
用以下内容替换LoginController。我已经删除了username（）方法，并替换了tryLogin（）方法，以根据您的会话值'table_id'获取数据库中的最后一个用户。
<?php
namespace App\Http\Controllers\Auth;
use App\Http\Controllers\Controller;
use Illuminate\Foundation\Auth\AuthenticatesUsers;
use Illuminate\Http\Request;
use Illuminate\Validation\ValidationException;
use Illuminate\Support\Facades\Session;
use App\User;
use Illuminate\Support\Facades\Auth;
class LoginController extends Controller
{
/*
|--------------------------------------------------------------------------
| Login Controller
|--------------------------------------------------------------------------
|
| This controller handles authenticating users for the application and
| redirecting them to your home screen. The controller uses a trait
| to conveniently provide its functionality to your applications.
|
*/
use AuthenticatesUsers;
/**
* Where to redirect users after login.
*
* @var string
*/
protected $redirectTo = '/home';
/**
* Create a new controller instance.
*
* @return void
*/
public function __construct(User $user)
{
$this->middleware('guest')->except('logout');
$this->user = $user;
}
/**
* Check either username or email.
* @return string
*/
public function login(Request $request)
{
$this->validateLogin($request);
// If the class is using the ThrottlesLogins trait, we can automatically throttle
// the login attempts for this application. We'll key this by the username and
// the IP address of the client making these requests into this application.
if ($this->hasTooManyLoginAttempts($request)) {
$this->fireLockoutEvent($request);
return $this->sendLockoutResponse($request);
}
if ($this->attemptLogin($request)) {
return $this->sendLoginResponse($request);
}
// If the login attempt was unsuccessful we will increment the number of attempts
// to login and redirect the user back to the login form. Of course, when this
// user surpasses their maximum number of attempts they will get locked out.
$this->incrementLoginAttempts($request);
return $this->sendFailedLoginResponse($request);
}
/**
* Validate the user login.
* @param Request $request
*/
protected function validateLogin(Request $request)
{
$this->validate(
$request,
[
'password' => 'required|string',
],
[
'password.required' => 'Password is required',
]
);
}
/**
* @param Request $request
* @throws ValidationException
*/
protected function sendFailedLoginResponse(Request $request)
{
$request->session()->put('login_error', trans('auth.failed'));
throw ValidationException::withMessages(
[
'error' => [trans('auth.failed')],
]
);
}
protected function attemptLogin(Request $request, User $user)
{
if (session()->has('table_id') != true) return redirect()->back()->withErrors(['error' => 'No username is set.']);
$userName = $user->where('name', session('table_id'))->orderBy('id', 'desc')->first()->name;
$remember = true;
if (Auth::attempt(['name' => $userName, 'password' => request('password')], $remember)) {
return redirect()->intended();
}
}
}
答案 1 :(得分：0)
您不应更改/删除任何框架文件和代码。 在您的登录控制器顶部，只需添加以下特征：
use AuthenticatesUsers;
然后您可以覆盖所有登录功能。
用于验证用户名/密码的密码只需覆盖 attemptLogin（）函数。
答案 2 :(得分：0)
因此，如果我理解您的问题是对的，那么您想要更改默认的sql查询，以便在验证时选择用户。
在attemptLogin方法中，您调用attempt，它在StatefulGuard接口中，实现在/vendor/laravel/framework/src/Illuminate/Auth/SessionGuard.php中，因此您需要覆盖完整的attempt方法，或者其中的任何方法。
答案 3 :(得分：0)
我找到了另一个可行的解决方案，但我相信它会搞乱（我不确定），这就是为什么我将Polaris的答案投票为正确的解决方案的原因。
您可以保留默认的LoginController并修改App / User.php，如下所示：
它基本上会覆盖retrieveByCredentials中使用的Illuminate\Auth\EloquentUserProvider;方法。问题是，我认为通常不会直接从Users.php访问此方法，因此您不会直接覆盖它。但是由于某种原因它起作用:)）。
namespace App;
use Illuminate\Notifications\Notifiable;
use Illuminate\Foundation\Auth\User as Authenticatable;
use Illuminate\Auth\EloquentUserProvider;
class User extends Authenticatable
{
use Notifiable;
/**
* The attributes that are mass assignable.
*
* @var array
*/
protected $fillable = [
'name', 'password',
];
/**
* The attributes that should be hidden for arrays.
*
* @var array
*/
protected $hidden = [
'password', 'remember_token',
];
public function retrieveByCredentials(array $credentials)
{
if (empty($credentials) ||
(count($credentials) === 1 &&
array_key_exists('password', $credentials))) {
return;
}
// First we will add each credential element to the query as a where clause.
// Then we can execute the query and, if we found a user, return it in a
// Eloquent User "model" that will be utilized by the Guard instances.
$query = $this->createModel()->newQuery();
foreach ($credentials as $key => $value) {
if (Str::contains($key, 'password')) {
continue;
}
if (is_array($value) || $value instanceof Arrayable) {
$query->whereIn($key, $value);
} else {
$query->where($key, $value);
}
}
return $query->orderBy('id', 'desc')->first();
}
}