I have a database with 'birth_date' column, which can be NULL or a date.

If I use plain 'echo' to output birth_day, it works in either case - as null and as a date.

If however I'm using Twig as a template engine and accessing birthday through Twig, it works ONLY when there is a date. If there is NULL, then application crashes and browser gives me back ERR_EMPTY_RESPONSE. Nothing more.

I'm pretty sure the problem occurs somewhere in the ORM, but I can't figure out how to solve it. I'd like to have just and empty string outputed in Twig if there's a NULL in db.

This isn't a problem of Twig because if I pass to it a null value, it simply doesn't print it.