User Class not found in Laravel 5

问题

I have got the following Problem. I have just upgraded to Laravel 5 from 4.2 but my UserController which I first just copied to the new Controllers folder does not work.

It always tells me that it does not fiend the User Model.

My Code looked like the following when I copied it:

UserController.php

<?php

use App\Transformer\UserTransformer;

class UserController extends ApiController
{
public function index()
{
    App::abort(403, 'This is not allowed');
}

public function show($id)
{   
    $user = User::find($id);
    if($user->access_token!=Input::get('access_token')){
        return "It is not allowed to access data from other users";
    }else{
        $result = $this->respondWithItem($user, new UserTransformer);
        return $result;
    }
}

public function getID()
{   
    $user = User::where('email', '=', Input::get('email'))->first();
    if($user->access_token!=Input::get('access_token')){
        return "It is not allowed to access data from other users";
    }else{
        $result = $user->id;
        return $result;
    }
}

public function register()
{
    $user = new User;
    $name = Input::get('name');
    $email = Input::get('email');
    $password = Input::get('password');

    if($name != null AND $email != null AND $password != null){
        if(User::where('email', '=', Input::get('email'))->exists()){
            return "A user with this email already exists";
        }else{
            $user->name = $name;
            $user->email = $email;
            $user->password = $password;
            $user->save();
            return "Success";
        }
    }else{
        return "All fields are required";
    }
}

public function login(){
    $user = User::where('email', '=', Input::get('email'))->first();
    if($user != null){
        if($user->password==Input::get('password')){
            $then =$user->time;
            $now = strtotime("now");
            $thenTimestamp = strtotime($then);
            $difference = $now - $thenTimestamp;
            if((empty($user->date) AND empty($user->time))OR($difference >=10800)OR($user->date!=date('d.m.Y'))){
                $user->access_token=self::getGUID();
                $timestamp = time();
                $user->date=date("d.m.Y",$timestamp);
                $timestamp = strtotime("now");
                $user->time=date('H:i', $timestamp);
                $user->save();
            }
            return $user->access_token;
        }
        else
            return "Wrong username or password";
    }else
        return "Wrong username or password";
}

function getGUID(){
    if (function_exists('com_create_guid')){
        return com_create_guid();
    }else{
        mt_srand((double)microtime()*100000);
        $charid = strtoupper(md5(uniqid(rand(), true)));
        $hyphen = chr(45);
        $uuid = 
            substr($charid, 0, 8).$hyphen
            .substr($charid, 8, 4).$hyphen
            .substr($charid,12, 4).$hyphen
            .substr($charid,16, 4).$hyphen
            .substr($charid,20,12);
        return $uuid;
    }
}

public function check(){
    $user = User::where('access_token', '=', Input::get('access_token'))->first();
    if($user != null){

    }else
    return "no session";
}
}

I did not have the the Controller namespaced and the User Model just worked out of the box. The UserTransformer does have the User Model included. Here the original copy:

<?php

use App\User;
use League\Fractal\TransformerAbstract;

class UserTransformer extends TransformerAbstract
{
/**
 * Turn this item object into a generic array
 *
 * @return array
 */
public function transform(User $user)
{
    return [
        'id'             => (int) $user->id,
        'name'           => $user->name,
        'email'            => $user->email,
        'phone'         => $user->img,
        'mobile'       => $user->mobile,
        'address'       => $user->address,
    ];
}
}

That is everything that I needed to have the functions to work.

But now in Laravel 5 the UserController does tell me that the User class is not found. I have tried to add lines like this "use App/User" or "use App/Http/Controllers/User" to the UserController. It did not work. I am not sure why since I have got my Transformer included I do not get any error for this but the User does not work. I have also tried different use methods to include the User Model into the Transfomer since I though there might be an error but I do not get a working version.

I hope someone can help me.

回答1:

Let's clarify just some things that could be interfering in loading the controller.

The route: by default, laravel comes with a provider called RouteServiceProvider found at app\providers. If you take a look to this file you will find that there is a variable named $namespace. This is very usefull if you want get more "clear" routes at routes.php file. For example, having $namespace = 'App\Http\Controllers' you convert this...

Route::get('welcome', 'App\Http\Controllers\HomeController@welcome');

to this...

Route::get('welcome', 'HomeController@welcome');

So yes, a short choice for write your rules. By default, the value of $namespace is set to {Application Name}\Http\Controllers

The controller: If you laravel installation is working with the RouteServiceProvider then your controller never will be found, because the routes prefix the namespace previously declared. So, which namespace should I use in controllers? there are two options:

Following the conventions of laravel 5 putting your controller at app/Http/Controllers/ folder. Then, declare the namespace as default:
```
namespace {Application Name}\Http\Controllers;
```
and setting it at routes.php like:
```
// weather is a controller
Route::get('foo', 'UserController@index');

// weather is a resource
Route::resource('api-user', 'UserController');
```
Notice that the namespace structure match the same folder structe where it is resides (Http/Controllers/)
Delete RouteServiceProvider from providers folder AND delete it from providers array in config/app.php file. Then, you can use "absolute" namespaces like:
```
namespace {Application Name}\Http\Controllers;

Route::get('foo', 'Myapp\Http\Controllers\UserController@index');
```

Application name and autoload

did you question yourself why app folder is not added at namespace? Take a look the composer.json file:

"autoload": {
    "classmap": [
        "database"
    ],
    "psr-4": {
        "MyCoolApp\\": "app/"
    }
},

If you note, you will see that there is an alias that points out to app/ folder. So, for app will response to the alias instead of app\Http\Controllers. I am no expert in this topic, hope somebody give me hand to expand this explanation, but I have read that psr-4 is like a rule that make you match the namespace with the folder structure. As result, if your controller is like...