Hi Massimo Just came across this post and got a bit alarmed, so when i check if a record exists i don't have to use the usual '==' but instead '=' ?
On Monday, October 10, 2011 at 3:55:27 PM UTC+2, Massimo Di Pierro wrote: > > row = db.postcode_cache(postcode=postcode) > if not row: > db.postcode_cache.insert(postcode=postcode,nearset=nearest) > elif not row.nearest: row.update_record(nearset=nearest) > else: pass # do nothing > > On Oct 10, 8:22 am, Chris Rowson <[email protected]> wrote: > > Hi list, > > > > I have a database table which looks like this: > > > > postcode_cache > > ------------------------ > > postcode (UNIQUE) > > lat > > lon > > nearest > > > > I want to test first whether or not a record exists for 'postcode' and > > if a record does exist, I want to check whether the 'nearest' field > > contains any data. > > > > I've tried this: > > > > if db(db.postcode_cache.postcode==postcode).select().first()==None: > > create_a_new_postcode_record() > > > > elif > db(db.postcode_cache.postcode==postcode).select(db.postcode_cache.nearest)= > =None: > > populate_the_nearest_field() > > > > else: > > nothing_to_do() > > > > And while the check to establish whether or not a record exists seems > > to work, the check to see whether or not the 'nearest' field within > > the record is populated doesn't seem to work. > > > > Can anyone tell me what I'm doing wrong please? > > > > Thank you, > > > > Chris -- Resources: - http://web2py.com - http://web2py.com/book (Documentation) - http://github.com/web2py/web2py (Source code) - https://code.google.com/p/web2py/issues/list (Report Issues) --- You received this message because you are subscribed to the Google Groups "web2py-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
