Se agregaron asserts a las entidades

src/StatsBundle/Entity/DeviceServer.php

@@ -39,6 +39,7 @@ class DeviceServer
      * @ORM\Column(type="string", length=255)
      * 
      * @Assert\NotNull
+     * @Assert\Url
      */
     private $url;
 
@@ -48,6 +49,9 @@ class DeviceServer
      * @ORM\Column(type="array")
      * 
      * @Assert\NotNull
+     * @Assert\All({
+     *     @Assert\Choice(callback={"StatsBundle\Utils\DeviceTypes","getChoices"})
+     * })
      */
     private $deviceTypes;
 

src/StatsBundle/Entity/StatsDevice.php

@@ -40,6 +40,7 @@ class StatsDevice
      * @ORM\Column(type="string", length=255)
      * 
      * @Assert\NotNull
+     * @Assert\Choice(callback={"StatsBundle\Utils\DeviceTypes","getChoices"})
      */
     private $deviceType;