Updated casbin to 1.x.

composer.json

@@ -11,7 +11,7 @@
     "license": "Apache-2.0",
     "require": {
     	"laravel/framework": "~5.1",
-    	"casbin/casbin": ">=0.2.1"
+    	"casbin/casbin": "~1.0"
     },
     "require-dev": {
         "phpunit/phpunit": "~5.7|~6.0|~7.0|~8.0",

src/Adapters/DatabaseAdapter.php

@@ -62,7 +62,9 @@ class DatabaseAdapter implements DatabaseAdapterContract
         $rows = $this->eloquent->getAllFromCache();
 
         foreach ($rows as $row) {
-            $line = implode(', ', array_slice(array_values($row), 1));
+            $line = implode(', ', array_filter($row, function ($val) {
+                return '' != $val && !is_null($val);
+            }));
             $this->loadPolicyLine(trim($line), $model);
         }
     }

src/Models/Rule.php

@@ -44,12 +44,12 @@ class Rule extends Model
     /**
      * Gets rules from caches.
      *
-     * @return void
+     * @return mixed
      */
     public function getAllFromCache()
     {
         $get = function () {
-            return $this->get()->toArray();
+            return $this->select('ptype', 'v0', 'v1', 'v2', 'v3', 'v4', 'v5')->get()->toArray();
         };
         if (!$this->config('cache.enabled', false)) {
             return $get();
@@ -60,8 +60,6 @@ class Rule extends Model
 
     /**
      * Refresh Cache.
-     *
-     * @return void
      */
     public function refreshCache()
     {
@@ -75,8 +73,6 @@ class Rule extends Model
 
     /**
      * Forget Cache.
-     *
-     * @return void
      */
     public function forgetCache()
     {
@@ -85,8 +81,6 @@ class Rule extends Model
 
     /**
      * Init cache.
-     *
-     * @return void
      */
     protected function initCache()
     {