[ProductVariant] Add version property to a product variant

app/migrations/Version20170206141520.php

@@ -0,0 +1,34 @@
+<?php
+
+namespace Sylius\Migrations;
+
+use Doctrine\DBAL\Migrations\AbstractMigration;
+use Doctrine\DBAL\Schema\Schema;
+
+/**
+ * Auto-generated Migration: Please modify to your needs!
+ */
+class Version20170206141520 extends AbstractMigration
+{
+    /**
+     * @param Schema $schema
+     */
+    public function up(Schema $schema)
+    {
+        // this up() migration is auto-generated, please modify it to your needs
+        $this->abortIf($this->connection->getDatabasePlatform()->getName() !== 'mysql', 'Migration can only be executed safely on \'mysql\'.');
+
+        $this->addSql('ALTER TABLE sylius_product_variant ADD version INT DEFAULT 1 NOT NULL');
+    }
+
+    /**
+     * @param Schema $schema
+     */
+    public function down(Schema $schema)
+    {
+        // this down() migration is auto-generated, please modify it to your needs
+        $this->abortIf($this->connection->getDatabasePlatform()->getName() !== 'mysql', 'Migration can only be executed safely on \'mysql\'.');
+
+        $this->addSql('ALTER TABLE sylius_product_variant DROP version');
+    }
+}

src/Sylius/Bundle/CoreBundle/Resources/config/doctrine/model/ProductVariant.orm.xml

@@ -17,6 +17,8 @@
                                       http://doctrine-project.org/schemas/orm/doctrine-mapping.xsd">
 
     <mapped-superclass name="Sylius\Component\Core\Model\ProductVariant" table="sylius_product_variant">
+        <field name="version" type="integer" version="true" />
+
         <field name="onHold" column="on_hold" type="integer" />
         <field name="onHand" column="on_hand" type="integer" />
         <field name="tracked" type="boolean" />

src/Sylius/Component/Core/Model/ProductVariant.php

@@ -23,6 +23,11 @@ use Webmozart\Assert\Assert;
  */
 class ProductVariant extends BaseVariant implements ProductVariantInterface
 {
+    /**
+     * @var int
+     */
+    protected $version = 1;
+
     /**
      * @var int
      */
@@ -105,6 +110,14 @@ class ProductVariant extends BaseVariant implements ProductVariantInterface
         return $string;
     }
 
+    /**
+     * {@inheritdoc}
+     */
+    public function getVersion()
+    {
+        return $this->version;
+    }
+
     /**
      * {@inheritdoc}
      */

src/Sylius/Component/Core/Model/ProductVariantInterface.php

@@ -14,6 +14,7 @@ namespace Sylius\Component\Core\Model;
 use Doctrine\Common\Collections\Collection;
 use Sylius\Component\Inventory\Model\StockableInterface;
 use Sylius\Component\Product\Model\ProductVariantInterface as BaseVariantInterface;
+use Sylius\Component\Resource\Model\VersionedInterface;
 use Sylius\Component\Shipping\Model\ShippableInterface;
 use Sylius\Component\Shipping\Model\ShippingCategoryInterface;
 use Sylius\Component\Taxation\Model\TaxableInterface;
@@ -26,7 +27,8 @@ interface ProductVariantInterface extends
     BaseVariantInterface,
     ShippableInterface,
     StockableInterface,
-    TaxableInterface
+    TaxableInterface,
+    VersionedInterface
 {
     /**
      * @return float

src/Sylius/Component/Core/spec/Model/ProductVariantSpec.php

@@ -16,10 +16,10 @@ use Doctrine\Common\Collections\Collection;
 use PhpSpec\ObjectBehavior;
 use Sylius\Component\Core\Model\ChannelInterface;
 use Sylius\Component\Core\Model\ChannelPricingInterface;
-use Sylius\Component\Core\Model\ProductInterface;
 use Sylius\Component\Core\Model\ProductVariant;
 use Sylius\Component\Core\Model\ProductVariantInterface;
 use Sylius\Component\Product\Model\ProductVariant as BaseProductVariant;
+use Sylius\Component\Resource\Model\VersionedInterface;
 use Sylius\Component\Shipping\Model\ShippableInterface;
 use Sylius\Component\Shipping\Model\ShippingCategoryInterface;
 use Sylius\Component\Taxation\Model\TaxableInterface;
@@ -55,6 +55,16 @@ final class ProductVariantSpec extends ObjectBehavior
         $this->shouldImplement(ShippableInterface::class);
     }
 
+    function it_implements_versioned_interface()
+    {
+        $this->shouldImplement(VersionedInterface::class);
+    }
+
+    function it_has_version_1_by_default()
+    {
+        $this->getVersion()->shouldReturn(1);
+    }
+
     function it_has_no_weight_by_default()
     {
         $this->getWeight()->shouldReturn(null);