[11.x] Use scout prefix when deleting all indexes (#841)

* use scout prefix when deleting indexes

* document changed behavior

* Update MeilisearchEngine.php

* Update UPGRADE.md

---------

Co-authored-by: Taylor Otwell <taylor@laravel.com>

Author: macbookandrew

UPGRADE.md

@@ -8,6 +8,10 @@ PR: https://github.com/laravel/scout/pull/839
 
 In previous Scout releases, the Algolia engine utilized `numericFilters` to power `where` conditions. However, `numericFilters` does not support simple string matching. In Scout 11.x, `filters` is now used instead of `numericFilters`.
 
+### Meilisearch Engine `scout:delete-all-indexes` Command
+
+In previous releases, the Meilisearch engine’s `scout:delete-all-indexes` command would drop all indexes from the Meilisearch server. In Scout 11.x, the command now only drops indexes with the application's currently configured Scout prefix. Typically, this corresponds to the `SCOUT_PREFIX` environment variable and / or the `scout.prefix` configuration value.
+
 ## Upgrading To 10.0 From 9.x
 
 ### Minimum Versions

src/Engines/MeilisearchEngine.php

@@ -3,6 +3,7 @@
 namespace Laravel\Scout\Engines;
 
 use BackedEnum;
+use Illuminate\Support\Facades\Config;
 use Illuminate\Support\LazyCollection;
 use Laravel\Scout\Builder;
 use Laravel\Scout\Jobs\RemoveableScoutCollection;
@@ -430,7 +431,9 @@ public function deleteAllIndexes()
         $indexes = $this->meilisearch->getIndexes($query);
 
         foreach ($indexes->getResults() as $index) {
-            $tasks[] = $index->delete();
+            if (str($index->getUid())->startsWith(Config::get('scout.prefix'))) {
+                $tasks[] = $index->delete();
+            }
         }
 
         return $tasks;

tests/Unit/MeilisearchEngineTest.php

@@ -636,6 +636,31 @@ public function test_delete_all_indexes_works_with_pagination()
         $engine = new MeilisearchEngine($client);
         $engine->deleteAllIndexes();
     }
+
+    public function test_delete_all_indexes_only_deletes_indexes_with_scout_prefix()
+    {
+        Config::shouldReceive('get')->with('scout.prefix')->andReturn('app_');
+
+        $client = m::mock(Client::class);
+        $client->shouldReceive('getIndexes')->andReturn($indexesResults = m::mock(IndexesResults::class));
+
+        $otherIndex = m::mock(Indexes::class);
+        $otherIndex->shouldReceive('getUid')->andReturn('users');
+
+        $prefixedIndex = m::mock(Indexes::class);
+        $prefixedIndex->shouldReceive('getUid')->andReturn('app_users');
+
+        $indexesResults->shouldReceive('getResults')->zeroOrMoreTimes()->andReturn([
+            $otherIndex,
+            $prefixedIndex,
+        ]);
+
+        $otherIndex->shouldNotReceive('delete');
+        $prefixedIndex->shouldReceive('delete')->once()->andReturn([]);
+
+        $engine = new MeilisearchEngine($client);
+        $engine->deleteAllIndexes();
+    }
 }
 
 class MeilisearchCustomKeySearchableModel extends SearchableModel