diff --git a/src/DataFixtures/AppPollFixtures.php b/src/DataFixtures/AppPollFixtures.php
index 5245756..ae5c00f 100644
--- a/src/DataFixtures/AppPollFixtures.php
+++ b/src/DataFixtures/AppPollFixtures.php
@@ -28,12 +28,9 @@ class AppPollFixtures extends Fixture {
 
 		$poll = new Poll();
 		$poll->setTitle( 'citron ou orange' );
-		$poll->setKind( 'text' );
 		$poll->setDescription( 'votre sorbert préféré' );
 		$poll->setAdminKey( uniqid() );
 		$poll->setModificationPolicy( 'nobody' );
-
-		$poll->setExpiracyDate( new DateTime() );
 		$poll->setMailOnVote( true );
 		$poll->setOwner( $owner );
 		$owner->addPoll( $poll );
@@ -74,11 +71,10 @@ class AppPollFixtures extends Fixture {
 
 		$poll->setTitle( 'démo sondage de texte avec deux commentaires' );
 		$poll->setDescription( 'description du sondage 2' );
-		$poll->setKind( 'text' );
+
 		$poll->setAdminKey( uniqid() );
 		$poll->setModificationPolicy( 'self' );
 		$poll->setMailOnComment( true );
-		$poll->setExpiracyDate( new DateTime() );
 
 
 		$poll->addTextChoiceArray( [ 'un truc', 'deux trucs' ] );
@@ -111,14 +107,14 @@ class AppPollFixtures extends Fixture {
 //
 //		$poll = new Poll();
 //		$poll->setTitle( 'accès restreint sondage de texte' );
-//		$poll->setKind( 'text' );
+//		$poll ;
 //		$poll->setPassword( md5( 'mot_de_passe_super' ) );
 //		$poll->setModificationPolicy( 'everybody' );
 //		$poll->setDescription( 'description du sondage a accès restreint. le mot de passe est mot_de_passe_super' );
 //		$poll->setAdminKey( uniqid() );
 //		$poll->setCustomUrl( 'boudoum_podom_podom' );
 //
-//		$poll->setExpiracyDate( new DateTime() );
+//		$poll ;
 //		$poll->setMailOnComment( true );
 //		$poll->setMailOnVote( true );
 //		$poll->setOwner( $owner );
@@ -145,7 +141,6 @@ class AppPollFixtures extends Fixture {
 
 		$poll->setTitle( "c'est pour aujourdhui ou pour demain" )
 		     ->setDescription( 'Vous avez le choix dans la date' )
-		     ->setExpiracyDate( new DateTime() )
 		     ->setKind( 'date' )
 		     ->setOwner( $owner )
 		     ->addChoice( $choice )
@@ -156,8 +151,6 @@ class AppPollFixtures extends Fixture {
 		$poll = new Poll();
 		$poll->setTitle( 'dessin animé préféré' )
 		     ->setDescription( 'choisissez votre animé préféré' )
-		     ->setExpiracyDate( new DateTime() )
-		     ->setKind( 'text' )
 		     ->setOwner( $owner )
 		     ->setModificationPolicy( 'self' )
 		     ->addTextChoiceArray( [
diff --git a/src/Entity/Comment.php b/src/Entity/Comment.php
index 2a9edca..713de7d 100644
--- a/src/Entity/Comment.php
+++ b/src/Entity/Comment.php
@@ -37,7 +37,7 @@ class Comment {
 	private $poll;
 
 	function __construct() {
-		 $this->setCreatedAt( new \DateTime() );
+		$this->setCreatedAt( new \DateTime() );
 	}
 
 	public function getId(): ?int {
diff --git a/src/Entity/Owner.php b/src/Entity/Owner.php
index 4ad6cc7..6ecfe6d 100644
--- a/src/Entity/Owner.php
+++ b/src/Entity/Owner.php
@@ -50,7 +50,7 @@ class Owner {
 	 */
 	private $modifierToken;
 	/**
-	 * @ORM\Column(type="datetime")
+	 * @ORM\Column(type="datetime" , options={"default"="CURRENT_TIMESTAMP"})
 	 */
 	private $createdAt;
 
@@ -62,6 +62,7 @@ class Owner {
 		$this->setModifierToken( uniqid() );
 	}
 
+
 	public function getId(): ?int {
 		return $this->id;
 	}
diff --git a/src/Entity/Poll.php b/src/Entity/Poll.php
index 618356c..c28a115 100644
--- a/src/Entity/Poll.php
+++ b/src/Entity/Poll.php
@@ -40,7 +40,7 @@ class Poll {
 	 */
 	public $description;
 	/**
-	 * @ORM\Column(type="datetime")
+	 * @ORM\Column(type="datetime" , options={"default"="CURRENT_TIMESTAMP"})
 	 * @Serializer\Expose()
 	 */
 	public $creationDate;
@@ -60,7 +60,7 @@ class Poll {
 	 * @Serializer\Type("string")
 	 * @Serializer\Expose()
 	 */
-	public $kind;
+	public $kind = 'text';
 	/**
 	 * array of possible answer to each choice, by default: "yes" or nothing only.
 	 * could be also "yes", "maybe", "no". extensible to anything
@@ -158,7 +158,7 @@ class Poll {
 	public function addDaysToDate( \DateTime $date, int $days ) {
 		$st = strtotime( $date->getTimestamp() . ' + ' . $days . ' days' );
 
-		return new \DateTime( "@$st" );
+		return new \DateTime( $st );
 	}
 
 	public function getId(): ?int {
diff --git a/src/Entity/timedTrait.php b/src/Entity/timedTrait.php
new file mode 100644
index 0000000..2621137
--- /dev/null
+++ b/src/Entity/timedTrait.php
@@ -0,0 +1,12 @@
+<?php
+
+namespace App\Traits;
+
+use Doctrine\ORM\Mapping as ORM;
+
+trait Timed {
+	/**
+	 * @ORM\Column(type="datetime" , options={"default"="CURRENT_TIMESTAMP"})
+	 */
+	private $createdAt;
+}