Agregado de validaciones para ver si existen cada una de las columnas

app/DoctrineMigrations/Version20180315124145.php

@@ -2,13 +2,13 @@
 
 namespace Application\Migrations;
 
-use Doctrine\DBAL\Migrations\AbstractMigration;
 use Doctrine\DBAL\Schema\Schema;
+use MigrationsBundle\Migrations\MigrationsBase;
 
 /**
  * Auto-generated Migration: Please modify to your needs!
  */
-class Version20180315124145 extends AbstractMigration
+class Version201a80315124145 extends MigrationsBase
 {
     /**
      * @param Schema $schema
@@ -16,10 +16,18 @@ class Version20180315124145 extends AbstractMigration
     public function up(Schema $schema)
     {
         // this up() migration is auto-generated, please modify it to your needs
-        $this->addsql("ALTER TABLE oltmodel ADD netmiko VARCHAR(255) DEFAULT NULL;");
-        $this->addsql("ALTER TABLE oltmodel_audit ADD netmiko VARCHAR(255) DEFAULT NULL;");
-        $this->addSql("ALTER TABLE olt ADD backups TINYINT(1) DEFAULT '1' NOT NULL, CHANGE execute_snmp execute_snmp BOOLEAN DEFAULT TRUE;");
-        $this->addSql("ALTER TABLE olt_audit ADD backups TINYINT(1) DEFAULT '1', CHANGE execute_snmp execute_snmp BOOLEAN DEFAULT TRUE;");
+        if (!$this->existFieldInTable('oltmodel', 'netmiko')) {
+            $this->addsql("ALTER TABLE oltmodel ADD netmiko VARCHAR(255) DEFAULT NULL;");
+        }
+        if (!$this->existFieldInTable('oltmodel_audit', 'netmiko')) {
+            $this->addsql("ALTER TABLE oltmodel_audit ADD netmiko VARCHAR(255) DEFAULT NULL;");
+        }
+        if (!$this->existFieldInTable('olt', 'backups')) {
+            $this->addSql("ALTER TABLE olt ADD backups TINYINT(1) DEFAULT '1' NOT NULL, CHANGE execute_snmp execute_snmp BOOLEAN DEFAULT TRUE;");
+        }
+        if (!$this->existFieldInTable('olt_audit', 'backups')) {
+            $this->addSql("ALTER TABLE olt_audit ADD backups TINYINT(1) DEFAULT '1', CHANGE execute_snmp execute_snmp BOOLEAN DEFAULT TRUE;");
+        }
     }
 
     /**