Question

In my Symfony/Doctrine app, I have a query that orders by RANDOM(). I call this same method several times, but it looks like the query’s result is being cached.

Here’s my relevant code:

$query = $table->createQuery('p')
    ->select('p.*, RANDOM() as rnd')
    ->orderBy('rnd')
    ->limit(1)
    ->useQueryCache(null)
    ->useResultCache(null);
$result = $query->fetchOne();

Unfortunately, the same record is returned every time, regardless of me passing null to both useQueryCache and useResultCache. I tried using false instead of null, but that didn’t work either. Lastly, I also tried calling both setResultCacheLifeSpan(0) and setResultCacheLifeSpan(-1), but neither call made a difference.

Any insight on how to prevent caching since I want a different random row to be selected each time I call this method?

Edit: I also tried calling clearResultCache(), but that just ended up causing an error stating: “Result Cache driver not initialized”.

Edit 2: As requested, here’s the SQL generated by calling $query->getSqlQuery():

SELECT c.id AS c__id, c.name AS c__name, c.image_url AS c__image_url,
c.level AS c__level, c.created_at AS c__created_at, c.updated_at
AS c__updated_at, RANDOM() AS c__0 FROM cards c ORDER BY c__0 LIMIT 1

Answer 1

It turns out I’m a moron. I tried to simplify my query for this question, and in doing so, I didn’t capture the true cause. I had a where() and andWhere() call, and the combination of conditions resulted in only one possible record being matched. Thanks for taking the time to respond, everyone, sorry to have wasted your time!