perfect. I had 5 records in the database, but only the last one had a date. I put a try ... except and it works fine.
Simon On Sunday, 11 November 2012 22:27:37 UTC, Niphlod wrote: > > print before adding :P > > python exception says that chart.id_chart.lastupdated is None. > > On Sunday, November 11, 2012 11:20:04 PM UTC+1, Simon Carr wrote: >> >> so given this code then >> >> def refresh_charts(): >> import datetime >> charts = db(db.user_chart).select() >> for chart in charts: >> a = chart.id_chart.lastupdated >> print chart.id_chart.lastupdated, a + datetime.timedelta(hours=5) >> >> why do I get an error saying >> >> TypeError: unsupported operand type(s) for +: 'NoneType' and >> 'datetime.timedelta' >> >> >> You can probably see what I am trying to do with the code above. How >> should I do it? >> >> On Sunday, 11 November 2012 21:17:07 UTC, viniciusban wrote: >>> >>> Your myrecord.datetimevalue is already a python datetime.datetime field. >>> >>> >>> On Sun, Nov 11, 2012 at 6:24 PM, Simon Carr <[email protected]> wrote: >>> > What is the best way to create a python datetime object from a >>> datetime >>> > field. i.e >>> > >>> > import datetime >>> > ... >>> > my_date_time_object = datetime.datetime(myrecord.datetimevalue) >>> > >>> > Ultimately what I want to do is add x hours to a datetime value held >>> in a >>> > field and compare the new time to datetime.now to see if it is time >>> for a >>> > file to be updated. >>> > >>> > Thanks >>> > Simon >>> > >>> > -- >>> > >>> > >>> > >>> >> --
