Jira issue originally created by user maryo:
When trying to apply a [NOT] NULL condition on LEFT JOINed association. It ends with an error.
"Cannot add having condition on a non result variable."
->leftJoin('r.players', 'players', 'WITH', 'players = :player')
->where('players IS NULL');
It was working 3 month ago. But then, this commit broke it.
Or in other words if this is not a bug. How to test if the collection does not contain let's say a user with ID 5 (AND XX OR YY) with DQL/queryBuilder API? IN SQL I would just simply LEFT JOIN it with ON condition and then i would test it for existence using IS NULL in WHERE condition. How to do this using DQL when the pasted example ends with an error?
Comment created by maryo:
OK. players.id IS NULL (but it's uglier)
Comment created by Soullivaneuh:
r.players IS NULL works too.
r.players IS NULL
But I don't understand why this will be not fixed. I agree, it's uglier.
I am checking the activity and it looks It was me who changed it to "Won't fix". If it's true then it was an accident. Sorry if I'm wrong.
Comment created by pejot:
also experiencing this error. Worked fine with 2.4.7, now trying to migrate to 2.5.0 and getting this error. The problem is, even when I do select the variable to SELECT, still getting the error.
Comment created by mrthehud:
I'm seeing this too - but I actually think the "players.id IS NULL" is right - otherwise what you're really asking for is something like "COUNT(r.players) == 0" - which might cause problems when you combine the query with pagination (for instance, using the KNP Paginator in Symfony).
Comment created by benjamin:
Still no updates on this bug, two years after? I'm surprised that a potential bug introduced by a commit is left without any comment from the core team for so long.