doctrine extra lazy load doesn't work as expected with count

Question

I have an entity Shop and a related entity ShopProduct, with the following relation:

/**
 * @OR         


        

Answer 1

You are not using twig's count function but the php internal one like this. Twig will execute the functions one by one ( first calling getProducts resulting in the load of all products , then count ).

{{ entity.getProducts().count }}

The getter is called automatically meaning you can just output entity.products and use twigs internal length filter to count the result ... but the result is the same ( fetching all products ).

{{ entity.products|length }}

what you're really looking for is a method setting the count on your Shop entity provided by the ShopRepository.

public function findAllAddCount()
{
    $qb = $this->createQueryBuilder('s');
    $query = $qb
        ->set('s.productCount', $qb->expr()->count('s.products'))
        ->getQuery()
   ;

   return $query->getResult();
}

... and add this to your entity:

protected $productCount;

public function getProductCount()
{
   return $this->productCount;
}

public function setProductCount($count)
{
    $this->productCount = $count;

    return $this;
}

Then ouput the product count in twig like this:

{{ entity.productCount }}

Answer 2

Just encountered the same problem and the solution was very simple:

{{ value.getAlerts.count() }}

instead of

{{ value.getAlerts.count }}

Twig must be overriding the Doctrine count() method meant to "Extra Lazy Load" with a variant of it's own implementation that just dumbly fetches all entities to count them.

That turned all expected SELECT * queries into COUNT(*)...