Lumen Cache\Store is not instantiable - caching

Question

I'm quite new to Laravel and Lumen, so my question may be a little simple, but I couldn't find any useful answer yet.
Lumen version is 5.1.
So I tried to create a data repository supported by a cache. Firstly I want to use FileStore, then I want to move to some more appropriate.
I tried to inject Cache repository like this:
<?php
namespace App\Repositories;
use Illuminate\Cache\Repository;
class DataRepository
{
private $cache;
public function __construct(Repository $cache)
{
$this->cache = $cache;
}
}
It seemed pretty simple to me. But when I try to use this repo in my controller, and tried to inject this repo into it, during instantiation I get the following error:
BindingResolutionException in Container.php line 749:
Target [Illuminate\Contracts\Cache\Store] is not instantiable.
I guessed the repository cannot find the matching and useable store implementation. When I tried to bind the Store to \Illumante\Cache\FileStore like this:
$this->app->bind(\Illuminate\Contracts\Cache\Store::class, \Illuminate\Cache\FileStore::class);
I got a new kind of error:
Unresolvable dependency resolving [Parameter #1 [ <required> $directory ]] in class Illuminate\Cache\FileStore
I guess I have a more complicated config issue, so I didn't want to walk through the dependency tree.
In my .env I have these:
CACHE_DRIVER=file and SESSION_DRIVER=file
In Lumen I explicitly enabled the facades, the DotEnv (and the eloquent also for my data repositories).
Dotenv::load(__DIR__.'/../');
$app = new Laravel\Lumen\Application(
realpath(__DIR__.'/../')
);
$app->withFacades();
$app->withEloquent();
I tried to add a cache.php configuration. In the bootstrap/app.php I added $app->configure('cache'); to use it with the following configs:
<?php
return [
'default' => env('CACHE_DRIVER', 'file'),
'stores' => [
'file' => [
'driver' => 'file',
'path' => storage_path('framework/cache'),
],
],
];
Could you help me, how can I bootstrap the Cache properly?

Answer 1

Answer
The cache implementation in Lumen is registered as:
Illuminate\Contracts\Cache\Repository
Not
Illuminate\Cache\Repository
So you may change your code to:
<?php
namespace App\Repositories;
use Illuminate\Contracts\Cache\Repository;
class DataRepository
{
private $cache;
public function __construct(Repository $cache)
{
$this->cache = $cache;
}
}
P.S You don't need to configure cache, since Lumen will configure any cache configuration automatically.
Tricks
But if you still want to use Illuminate\Cache\Repository, you may bind it first in your ServiceProvider or bootstrap/app.php file:
use Illuminate\Cache\Repository as CacheImplementation;
use Illuminate\Contracts\Cache\Repository as CacheContract;
$app->singleton(CacheImplementation::class, CacheContract::class);