src/Database/migrations/2020_04_17_155932_add_role_id_to_users.php

@@ -30,6 +30,7 @@ public function up()
     public function down()
     {
         Schema::table('users', function (Blueprint $table) {
+            $table->dropForeign(['role_id']);
             $table->dropColumn('role_id');
         });
     }

src/Database/migrations/2020_04_17_160240_create_permission_table.php

@@ -27,6 +27,6 @@ public function up()
      */
     public function down()
     {
-        Schema::dropIfExists('permission');
+        Schema::dropIfExists('permissions');
     }
 }

src/Models/Role.php

@@ -2,6 +2,7 @@
 
 namespace Amir\Permission\Models;
 
+use Illuminate\Database\Eloquent\Builder;
 use Illuminate\Database\Eloquent\Model;
 
 class Role extends Model
@@ -10,6 +11,16 @@ class Role extends Model
 
     protected $fillable = ['name'];
 
+    public function scopeName(Builder $query, string $name)
+    {
+        $query->where('name', $name);
+    }
+
+    public function scopeNames(Builder $query, array $names)
+    {
+        $query->whereIn('name', $names);
+    }
+
     public function permissions()
     {
         return $this->belongsToMany(Permission::class);

src/Traits/HasRoles.php

@@ -12,6 +12,6 @@ public function role()
     }
 
     public function getRoleNameAttribute(){
-        return $this->role()->first() ? $this->role()->first()->name : null ;
+        return $this->role()->first()->name ?? null ;
     }
 }