DB change c_survey_invite.reminder_date can be null

src/CoreBundle/Migrations/Schema/V200/Version20.php

@@ -213,6 +213,9 @@ class Version20 extends AbstractMigrationChamilo
         $this->addSql('UPDATE user SET created_at = registration_date WHERE CAST(created_at AS CHAR(20)) = "0000-00-00 00:00:00"');
         $this->addSql('UPDATE user SET updated_at = registration_date WHERE CAST(updated_at AS CHAR(20)) = "0000-00-00 00:00:00"');
 
+        $this->addSql('ALTER TABLE c_survey_invitation CHANGE reminder_date reminder_date DATETIME DEFAULT NULL');
+        $this->addSql('UPDATE c_survey_invitation SET reminder_date = NULL WHERE CAST(reminder_date AS CHAR(20)) = "0000-00-00 00:00:00"');
+
         /*$table = $schema->getTable('course_rel_class');
         if (!$table->hasColumn('c_id')) {
             $this->addSql("ALTER TABLE course_rel_class ADD c_id int NOT NULL");

src/CourseBundle/Entity/CSurveyAnswer.php

@@ -76,6 +76,34 @@ class CSurveyAnswer
      */
     protected $user;
 
+    /**
+     * CSurveyAnswer constructor.
+     */
+    public function __construct()
+    {
+        $this->answerId = 0;
+    }
+
+    /**
+     * @return int
+     */
+    public function getIid(): int
+    {
+        return $this->iid;
+    }
+
+    /**
+     * @param int $iid
+     *
+     * @return CSurveyAnswer
+     */
+    public function setIid(int $iid): CSurveyAnswer
+    {
+        $this->iid = $iid;
+
+        return $this;
+    }
+
     /**
      * Set surveyId.
      *

src/CourseBundle/Entity/CSurveyInvitation.php

@@ -74,7 +74,7 @@ class CSurveyInvitation
     /**
      * @var \DateTime
      *
-     * @ORM\Column(name="reminder_date", type="datetime", nullable=false)
+     * @ORM\Column(name="reminder_date", type="datetime", nullable=true)
      */
     protected $reminderDate;