Symfony 在 foreach 循环时插入数据库条目

Question

My problem is, that symfony only inserts the last entry in the foreach loop and not all entries.

In my example, only Test 2 will be inserted.

My code: information: $_POST['title'] = Test, Test

$_POST['number'] = 1, 2

$titles = $_POST['title'] ?? [];
$numbers = $_POST['number'] ?? [];

    foreach ($titles as $key => $title) {
        $product->setNumber($numbers[$key]);
        dump($numbers[$key]);
        $product->setTitle($title);
        dump($title);
        $em->persist($product);
    }
    $em->flush();

Screenshot of my dump:

Screenshot of dump

Answer 1

when you call

$em->persist($product); it will store an ID into the $product entity and store it as a record in DB

if you den change the title and store again, it will look at the $product entity and see "OH THERE IS AN ID, SO HE WANTS TO DO UPDATE" so $em stores the title for the ID that is set in $product on your first loop.