在 Laravel 5 中找不到类“App\Http\Controllers\Artisan”
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Class 'App\Http\Controllers\Artisan' not found in Laravel 5
提问by Ariful Haque
I am in new Laravel and trying to learn by coding. I created migration and seed and both working fine when I call them from terminal, but I wanted to try this code in my HomeController and I get a big error.
我在新的 Laravel 中并尝试通过编码来学习。我创建了迁移和种子，当我从终端调用它们时，它们都可以正常工作，但是我想在我的 HomeController 中尝试这段代码，但出现了一个大错误。
Error
错误
FatalErrorException in HomeController.php line 23:
Class 'App\Http\Controllers\Artisan' not found
Code in Home Controller
家庭控制器中的代码
$hasTable = Schema::hasTable('users');
if ($hasTable==0)
{
echo "call cli to migration and seed";
$migrate = Artisan::call('migrate');
$seed = Artisan::call('db:seed');
echo "Migrate<br>";
print_r($migrate);
echo "Seed<br>";
print_r($seed);
}
I believe, if I load the correct namespace, I can avoid this error, but I am not sure.
我相信，如果我加载了正确的命名空间，我可以避免这个错误，但我不确定。
回答by Clive
Assuming you have the default Artisanalias set in your config/app.php, you're right that you just need to import the correct namespace.
假设您Artisan在 config/app.php 中设置了默认别名，那么您只需要导入正确的命名空间就对了。
Either add this top of the file:
要么添加文件的顶部：
use Artisan;
Or use a fully qualified namespace in your code:
或者在您的代码中使用完全限定的命名空间：
$migrate = \Artisan::call('migrate');
If you don't have the alias set for whatever reason, use
如果由于某种原因没有设置别名，请使用
use Illuminate\Support\Facades\Artisan;
instead.
反而。
回答by Limon Monte
When you just reference a class like Artisan::call('db:seed')PHP searches for the class in your current namespace.
当您只引用像Artisan::call('db:seed')PHP这样的类时，会在您当前的命名空间中搜索该类。
In this case that's App\Http\Controllers. However the Artisanclass obviously doesn't exists in your namespace for controllers but rather in the Laravel framework namespace. It has also an alias that's in the globalnamespace.
在这种情况下，就是App\Http\Controllers. 但是，Artisan该类显然不存在于控制器的命名空间中，而是存在于 Laravel 框架命名空间中。它还有一个位于全局命名空间中的别名。
You can either reference the alias in the root namespace by prepending a backslash:
您可以通过在前面加上反斜杠来引用根命名空间中的别名：
return \Artisan::call('db:seed');
Or add an import statement at the top:
或者在顶部添加导入语句：
use Artisan;
