[8.x] Init the traits when the model is being unserialized (#37492)

* Init the traits when the model is being unserialized

* Add tests for trait boot and initialization

Author: mtawil

src/Illuminate/Database/Eloquent/Model.php

@@ -2014,5 +2014,7 @@ public function __sleep()
     public function __wakeup()
     {
         $this->bootIfNotBooted();
+
+        $this->initializeTraits();
     }
 }

tests/Integration/Queue/ModelSerializationTest.php

@@ -187,6 +187,23 @@ public function testItReloadsNestedRelationships()
         $this->assertEquals($nestedUnSerialized->order->getRelations(), $order->getRelations());
     }
 
+    public function testItCanRunModelBootsAndTraitInitializations()
+    {
+        $model = new ModelBootTestWithTraitInitialization();
+
+        $this->assertTrue($model->fooBar);
+        $this->assertTrue($model::hasGlobalScope('foo_bar'));
+
+        $model::clearBootedModels();
+
+        $this->assertFalse($model::hasGlobalScope('foo_bar'));
+
+        $unSerializedModel = unserialize(serialize($model));
+
+        $this->assertFalse($unSerializedModel->fooBar);
+        $this->assertTrue($model::hasGlobalScope('foo_bar'));
+    }
+
     /**
      * Regression test for https://github.com/laravel/framework/issues/23068.
      */
@@ -319,6 +336,27 @@ public function test_model_serialization_structure()
     }
 }
 
+trait TraitBootsAndInitializersTest
+{
+    public $fooBar = false;
+
+    public function initializeTraitBootsAndInitializersTest()
+    {
+        $this->fooBar = ! $this->fooBar;
+    }
+
+    public static function bootTraitBootsAndInitializersTest()
+    {
+        static::addGlobalScope('foo_bar', function () {
+        });
+    }
+}
+
+class ModelBootTestWithTraitInitialization extends Model
+{
+    use TraitBootsAndInitializersTest;
+}
+
 class ModelSerializationTestUser extends Model
 {
     public $table = 'users';