How to delete from database with queryBuilder? - php

Question

I want to delete some data and return the number of the deleting.
This is my code :
public function deleteMyData() : ?int
{
$qb = $this->connection->createQueryBuilder()
->delete('myTable')
->where('pays ="us"')
;
return $qb->execute()->rowCount();
}
I already tested other things like :
->delete()
->from('myTable')
->where('pays ="fr"')
When I run my code I've got this error :
[Symfony\Component\Debug\Exception\FatalThrowableError]
Call to a member function rowCount() on integer
I dumped $qb->execute()->rowCount() and it return "0".
Thanks for your help !
PS : I think that the problem isn't the query because :
Error An exception occurred while executing 'DELETE FROM theQueryTest WHERE pays ="us"':
The SQL is great
PS 2 : I can't use ->getQuery()

Answer 1

This code returns an integer
return $qb->execute();
If you want to count row affected try this:
$qb = $this->createQueryBuilder();
//query
$count = $qb->getQuery()->getSingleScalarResult();

Answer 2

I found the solution
In my case, I have to use $this->connection HOWEVER I don't have to use $qb->execute()
I read the doc and I found this in Connection.php (->delete(...)) :
#return integer The number of affected rows.
So I have to use directly $this->connection->delete(...)
public function deleteMyData() : ?int
{
$qb = $this->connection
->delete('myTable', ['pays' => '"us"'])
;
return $qb;
}