don't purge meta when soft deleting

src/Metable.php

@@ -40,6 +40,9 @@ public static function bootMetable()
     {
         // delete all attached meta on deletion
         static::deleted(function (self $model) {
+            if (method_exists($model, 'isForceDeleting') && !$model->isForceDeleting()) {
+                return;
+            }
             $model->purgeMeta();
         });
     }

tests/Integration/MetableTest.php

@@ -5,6 +5,7 @@
 use Illuminate\Database\Eloquent\Collection;
 use Plank\Metable\Meta;
 use Plank\Metable\Tests\Mocks\SampleMetable;
+use Plank\Metable\Tests\Mocks\SampleMetableSoftDeletes;
 use Plank\Metable\Tests\TestCase;
 use ReflectionClass;
 
@@ -214,6 +215,30 @@ public function test_it_clears_meta_on_deletion()
         $this->assertEquals(0, $meta->count());
     }
 
+    public function test_it_does_not_clear_meta_on_soft_deletion()
+    {
+        $this->useDatabase();
+        $metable = $this->createMetableSoftDeletes();
+        $metable->setMeta('foo', 'bar');
+
+        $metable->delete();
+        $meta = Meta::all();
+
+        $this->assertEquals(1, $meta->count());
+    }
+
+    public function test_it_does_clear_meta_on_force_deletion()
+    {
+        $this->useDatabase();
+        $metable = $this->createMetableSoftDeletes();
+        $metable->setMeta('foo', 'bar');
+
+        $metable->forceDelete();
+        $meta = Meta::all();
+
+        $this->assertEquals(0, $meta->count());
+    }
+
     public function test_it_can_be_queried_by_single_meta_key()
     {
         $this->useDatabase();
@@ -502,4 +527,9 @@ private function createMetable(array $attributes = []): SampleMetable
     {
         return factory(SampleMetable::class)->create($attributes);
     }
+
+    private function createMetableSoftDeletes(array $attributes = []): SampleMetableSoftDeletes
+    {
+        return factory(SampleMetableSoftDeletes::class)->create($attributes);
+    }
 }

tests/Mocks/SampleMetableSoftDeletes.php

@@ -0,0 +1,15 @@
+<?php
+
+namespace Plank\Metable\Tests\Mocks;
+
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\SoftDeletes;
+use Plank\Metable\Metable;
+
+class SampleMetableSoftDeletes extends Model
+{
+    use Metable;
+    use SoftDeletes;
+
+    protected $table = 'sample_metables';
+}

tests/factories/MetableFactory.php

@@ -1,7 +1,12 @@
 <?php
 
 use Plank\Metable\Tests\Mocks\SampleMetable;
+use Plank\Metable\Tests\Mocks\SampleMetableSoftDeletes;
 
 $factory->define(SampleMetable::class, function (Faker\Generator $faker) {
     return [];
 });
+
+$factory->define(SampleMetableSoftDeletes::class, function (Faker\Generator $faker) {
+    return [];
+});

tests/migrations/2017_01_01_000000_create_sample_classes_tables.php

@@ -15,6 +15,7 @@ public function up()
     {
         Schema::create('sample_metables', function (Blueprint $table) {
             $table->increments('id');
+            $table->softDeletes();
             $table->timestamps();
         });
     }