mongodb - $or mongoose operator works on localhost but not on production -

mongodb - $or mongoose operator works on localhost but not on production -

i have force web application on prod server , find surprising issue:

var username = 'foo'; var user = this.db.model('user', userschema); user.findone({ $or: [ { username: username }, { email: { value: username } } ] }, 'id', function(err, doc) { if (err) { console.log(err); }else if (doc) { console.log('ok'); }else { console.log('any result'); } });

this exact same code works on localhost not on prod server (i go in else status on production server , in else if (doc) on localhost).

i print variable username before findone phone call , checked manually, username exist.

if drop $or operator , apply status on username, works !! proof $or operator responsible of failure.

i update node modules same way on both environements ("mongoose": ">=3.5.4").

my mongodb version same on both environements:

db version v2.0.4, pdfile version 4.5 git version: nogitversion

my localhost server: unbuntu. prod server: debian.

how explain ?

thanks.

i have upgraded mongodb v2.2.3 on prod server , works...

mongodb mongoose