Doctrine2Fatal error: Call to a member function format() on a non-object

[manjava]

I have the Fields the Type DATETIME and Other DATE but when i INSERT NULL I have This Error : on controller i set that :

$data ['dateCreation']        = $tab['dateCrea'];

$tab['dateCrea'] somtimes NULL other Times 123614 or 21/12/2014 21:05:00 or others time

in Entity I do That

public function setModificationdate($modificationdate)
    {
        $this->modificationdate = new \DateTime($modificationdate);

        return $this;
    }

Fatal error: Call to a member function format() on a non-object in C:\wamp\www\imp rimvert\vendor\ doctrine\dbal\l ib\Doctrine\DBA L\Types\DateTyp e.php on line 53
How can i resolve that

[Dormilich]

How can i resolve that

do not insert NULL values.

if the field allows NULL values, you have to somehow pass the NULL data type in doctrine as well (instead of the date/datetime data type).

[manjava]

so i get the data dynamically sometimes date sometimes contains 2000 or others but always i get this error