Add spatie/laravel-permission

docs/source/v2/spatie.blade.md

@@ -15,3 +15,22 @@ section: content
 
 ### For the central app: {#activitylog-central}
 - Set the `database_connection` key in `config/activitylog.php` to the name of your central database connection.
+
+## laravel-permission {#permission}
+
+Install the package like usual, but publish the migrations and move them to `migrations/tenant`:
+
+```
+php artisan vendor:publish --provider="Spatie\Permission\PermissionServiceProvider" --tag="migrations"
+mv database/migrations/*_create_permission_tables.php database/migrations/tenant
+```
+
+Then add this to your `AppServiceProvider::boot()` method:
+
+```php
+tenancy()->hook('bootstrapped', function (TenantManager $tenantManager) {
+    \Spatie\Permission\PermissionRegistrar::$cacheKey = 'spatie.permission.cache.tenant.' . $tenantManager->getTenant('id');
+});
+```
+
+The reason for this is that spatie/laravel-permission caches permissions & roles to save DB queries, which means that we need to separate the permission cache by tenant.