InvalidArgumentException : View [themes.] not found - laravel

Question

I get the following error message out of the blue.
InvalidArgumentException : View [themes.] not found.
Exception trace:
1 Illuminate\View\FileViewFinder::findInPaths("themes.")
C:\xampp\htdocs\RoosterIKEA\vendor\laravel\framework\src\Illuminate\View\FileViewFinder.php:92
2 Illuminate\View\FileViewFinder::findNamespacedView("mail::themes.")
C:\xampp\htdocs\RoosterIKEA\vendor\laravel\framework\src\Illuminate\View\FileViewFinder.php:76
Any idea which file this could be and what is going on?

Answer 1

In the class Illuminate\Mail\Markdown line 64
return new HtmlString(($inliner ?: new CssToInlineStyles)->convert(
$contents, $this->view->make('mail::themes.'.$this->theme)->render()
));
It appears that $this->theme is an empty string
Now the class already defines the property on line 24
/**
* The current theme being used when generating emails.
*
* #var string
*/
protected $theme = 'default';
Which means that you may have overridden this property by an empty string or maybe a null value in your markdown mailable
If you publish the components by
php artisan vendor:publish --tag=laravel-mail
You'll see a CSS file in resources/views/vendor/mail/html/themes named default.css
I found a way to reproduce this error on purpose to have a Mailable class like so
Run
php artisan make:mail OrderShipped --markdown=emails.orders.shipped
Then override the theme property by an empty string
<?php
namespace App\Mail;
use Illuminate\Bus\Queueable;
use Illuminate\Mail\Mailable;
use Illuminate\Queue\SerializesModels;
class OrderShipped extends Mailable
{
use Queueable, SerializesModels;
protected $theme = ''; // <--- HERE
/**
* Build the message.
*
* #return $this
*/
public function build()
{
return $this->markdown('emails.orders.shipped');
}
}
Now send an email
use App\User;
use App\Mail\OrderShipped;
Route::get('/', function () {
\Mail::to(User::first())->send(new OrderShipped());
});
And you would get the same error
The solution here is to either remove the protected $theme = ''; property or set it to default
I hope this helps