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vendor/spatie/laravel-permission/docs/advanced-usage/seeding.md

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+---
+title: Database Seeding
+weight: 2
+---
+
+You may discover that it is best to flush this package's cache before seeding, to avoid cache conflict errors. This can be done directly in a seeder class. Here is a sample seeder, which first clears the cache, creates permissions and then assigns permissions to roles (the order of these steps is intentional):
+
+```php
+use Illuminate\Database\Seeder;
+use Spatie\Permission\Models\Role;
+use Spatie\Permission\Models\Permission;
+
+class RolesAndPermissionsSeeder extends Seeder
+{
+    public function run()
+    {
+        // Reset cached roles and permissions
+        app()[\Spatie\Permission\PermissionRegistrar::class]->forgetCachedPermissions();
+
+        // create permissions
+        Permission::create(['name' => 'edit articles']);
+        Permission::create(['name' => 'delete articles']);
+        Permission::create(['name' => 'publish articles']);
+        Permission::create(['name' => 'unpublish articles']);
+
+        // create roles and assign created permissions
+
+        // this can be done as separate statements
+        $role = Role::create(['name' => 'writer']);
+        $role->givePermissionTo('edit articles');
+
+        // or may be done by chaining
+        $role = Role::create(['name' => 'moderator'])
+            ->givePermissionTo(['publish articles', 'unpublish articles']);
+
+        $role = Role::create(['name' => 'super-admin']);
+        $role->givePermissionTo(Permission::all());
+    }
+}
+```