Symfony - DateTime as param - php

Question

I have trouble defining my datetime param with Symfony.
I am trying to return null if last_scan_date is null
and if not to return results!
Error says:
Argument 2 passed to checkLastScan() must be an instance of DateTime, string given
My function:
public function checkLastScan($hash, \DateTime $lastScanDate)
{
$findLastScan = $this->getMyRepository()->findOneBy([
'hash' => $hash,
'lastScanDate' => $lastScanDate
]);
if (!$findLastScan) {
throw new \Exception('Not found!');
}
if ($lastScanDate === null) {
return null;
} else {
return $findLastScan;
}
}
and my call:
$this->requirePostParams(['hash', 'last_scan_date']);
$this->container->get('app')->checkLastScan(
$this->data['hash'],
$this->data['last_scan_date']
);
return $this->success();
And enitity:
/**
* #ORM\Column(name="last_scan_date", type="date", nullable=true)
*/
private $lastScanDate;
Maybe problem is when requiring post params like:
/**
* Require post params
*
* #param $params
*/
protected function requirePostParams($params)
{
$currentRequest = $this->get('request_stack')->getCurrentRequest();
$postData = $currentRequest->request->all();
$postContent = json_decode($currentRequest->getContent(), true);
if (!empty($postContent)) {
$postData = $postContent;
}
$this->data = $postData;
$missingParams = [];
foreach ($params as $param) {
if (!array_key_exists($param, $postData)) {
$missingParams[] = $param;
}
}

Answer 1

If $this->data (I asked at first but you did not answer to me properly) is just the POST array, of course all members of the array are treated as string.
You have to parse last_scan_date string and transform it to DateTime type.
Here is the code of the function (change the value of YOUR_POST_FORMAT to the format you use in your HTML form):
/**
* Require post params
*
* #param $params
*/
protected function requirePostParams($params)
{
$currentRequest = $this->get('request_stack')->getCurrentRequest();
$postData = $currentRequest->request->all();
$postContent = json_decode($currentRequest->getContent(), true);
if (!empty($postContent)) {
$postData = $postContent;
}
// HERE YOU PARSE STRING TO DATETIME TYPE
if (isset($postData['last_scan_date']) && !empty($postData['last_scan_date'])) {
$postData['last_scan_date'] = DateTime::createFromFormat('YOUR POST FORMAT', $postData['last_scan_date'])
} else {
$postData['last_scan_date'] = null;
}
$this->data = $postData;
$missingParams = [];
foreach ($params as $param) {
if (!array_key_exists($param, $postData)) {
$missingParams[] = $param;
}
}
}