Raise an error when one call `\count($entity->getSomethingThatIsACollection()`

[lyrixx]

It would be very nice to raise an error when one call

\count($entity->getSomethingThatIsACollection())

It's an error because doctrine will

1. fetch all data from the DB
2. hydrate everything
3. and finally call count() on the results

=> It will kill the performance when the collection is big

[VincentLanglet]

So $entity->getSomethingThatIsACollection()->count() should be prefered ?

The PersistenCollection still initialize the Collection when calling count on it, unless the fetch mode is FETCH_EXTRA_LAZY which is not often used, isn't it ?

[lyrixx]

It's better but IMHO the best way to do is to let the DB count everything