Add on delete cascade to foreign key constraints. Fixes #1

Resources/migrations/VersionTos20180615080524.php

@@ -0,0 +1,30 @@
+<?php
+namespace Application\Migrations;
+
+use Doctrine\DBAL\Migrations\AbstractMigration;
+use Doctrine\DBAL\Schema\Schema;
+
+class VersionTos20180615080524 extends AbstractMigration
+{
+
+    public function up(Schema $schema)
+    {
+        $tos = $schema->getTable('vierbergenlars_tos');
+
+        foreach ($tos->getForeignKeys() as $fk) {
+            $tos->removeForeignKey($fk->getName());
+            $tos->addForeignKeyConstraint($fk->getForeignTableName(), $fk->getColumns(), $fk->getForeignColumns(), [
+                'onDelete' => 'CASCADE'
+            ]);
+        }
+    }
+
+    public function down(Schema $schema)
+    {
+        $tos = $schema->getTable('vierbergenlars_tos');
+        foreach ($tos->getForeignKeys() as $fk) {
+            $tos->removeForeignKey($fk->getName());
+            $tos->addForeignKeyConstraint($fk->getForeignTableName(), $fk->getColumns(), $fk->getForeignColumns());
+        }
+    }
+}