--- /dev/null
+<?php
+
+namespace Application\Migrations;
+
+use Doctrine\DBAL\Migrations\AbstractMigration;
+use Doctrine\DBAL\Schema\Schema;
+use Symfony\Component\DependencyInjection\ContainerAwareInterface;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+
+/**
+ * Add published_at in `entry` table.
+ */
+class Version20170405182620 extends AbstractMigration implements ContainerAwareInterface
+{
+ /**
+ * @var ContainerInterface
+ */
+ private $container;
+
+ public function setContainer(ContainerInterface $container = null)
+ {
+ $this->container = $container;
+ }
+
+ private function getTable($tableName)
+ {
+ return $this->container->getParameter('database_table_prefix').$tableName;
+ }
+
+ /**
+ * @param Schema $schema
+ */
+ public function up(Schema $schema)
+ {
+ $entryTable = $schema->getTable($this->getTable('entry'));
+
+ $this->skipIf($entryTable->hasColumn('published_at'), 'It seems that you already played this migration.');
+
+ $entryTable->addColumn('published_at', 'datetime', [
+ 'notnull' => false,
+ ]);
+ }
+
+ /**
+ * @param Schema $schema
+ */
+ public function down(Schema $schema)
+ {
+ $entryTable = $schema->getTable($this->getTable('entry'));
+
+ $this->skipIf(!$entryTable->hasColumn('published_at'), 'It seems that you already played this migration.');
+
+ $entryTable->dropColumn('published_at');
+ }
+}