Hi Massimo, I made a simple app, accordingly this example the error seems related to the cache, because without the cache all works fine.
The model: db.define_table('reviews_like_s', Field('review_id', 'reference reviews'), Field('helpful', 'boolean')) db.define_table('reviews_s', Field('title')) db.reviews_s.pos = Field.Lazy(lambda row: db((db.reviews_like_s.review_id == row.reviews_s.id) & (db.reviews_like_s.helpful == True)).count() ) db.reviews_s.neg = Field.Lazy(lambda row: db((db.reviews_like_s.review_id == row.reviews_s.id) & (db.reviews_like_s.helpful == False)).count() ) Function: def test(): id = db.reviews_s.insert(title='xxx') db.reviews_like_s.insert(review_id=id, helpful=True) rows = db(db.reviews_s.id > 0).select( cache=(cache.ram,3600) ) return dict(reviews=rows) The view: {{for review in reviews:}} <p>{{=review.pos()}}</p> {{pass}} On my side the first time works well, the second rises the error. Best, Paolo 2012/8/30 paolo.vall...@gmail.com <paolo.vall...@gmail.com>: > Hi Massimo, > no, I do not have multiple models, I have defined the string > connection only once in db.py, that's all. > I have a few try...except but in other places, I do not thing they are > connected. > I will try to make a simple app ables to reproduce the problem as soon > as possible. > > Paolo > > 2012/8/30 Massimo Di Pierro <massimo.dipie...@gmail.com>: >> Can you make a simple app to reproduce this? >> >> Do you have try .... except anywhere? Do you have multiple models wich >> define the same db = DAL(...) connection? >> >> >> On Thursday, 30 August 2012 15:49:01 UTC-5, Paolo wrote: >>> >>> Hi Bruno, a simple db with sqlite without modules >>> >>> db = DAL('sqlite://storage.sqlite', lazy_tables=True ) >>> >>> sorry, but I've just discovered that the same problem is happened even >>> with lazy_tables=False >>> Paolo >>> >>> 2012/8/30 Bruno Rocha <rocha...@gmail.com>: >>> > How are you defining the db connection? are you using models or modules? >>> > which db? >>> > >>> > -- >>> > >>> > >>> > >>> >>> >>> >>> -- >>> Paolo >> >> -- >> >> >> > > > > -- > Paolo -- Paolo --