Hi, Karen. Looks like you are making steady progress. This is a bug in the Belchertown skin that I alluded to in another thread <https://groups.google.com/g/weewx-user/c/fKVxr07vMuE/m/I-PdDb7vBgAJ>.
In a convoluted way, the skin is asking for a value from xtypes using the call xtype.get_scalar(obs_type, record, db_manager) (Side note: the actual request is done through a getattr() query of a weewx.tags.CurrentObj object). Unfortunately, the value for record as provided by the Belchertown skin is None. In theory, the xtypes extension could look up the values it needs from the database, but that would require knowing the time, but with record equal to None, that's not possible either. The Belchertown skin needs to provide the current record. On Thu, Feb 18, 2021 at 8:39 AM Karen K <kk4468...@gmail.com> wrote: > My XType extension is working in principle now. It calculates, and it > delivers values, if there is $current.GTS, $latest.GTS, $day.GTS or > $yesterday.GTS included in the skin definition. Also, images are > generated showing the value over time. All is fine so far. > > Then I included the value in the Belchertown skin observation list. And I > got an error message. It turned out, that it is possible that get_scalar() > is called with *record is None*. From documentation I thought otherwise. > That was confusing. > > As I included "if record is None: raise weewx.CannotCalculate(obs_type)" > into get_scalar() no error message was logged any more. But no value was > displayed in Belchertown skin. Again: if I include "$current.GTS" into > the skin, the value is displayed. If I include the value in the observation > list in skin.conf, it is not. I looked around and found out that > Belchertown skin gets the value from calling weewx.tags.CurrentObj()within > their special extension "belchertown.py" That seems to not include GTS > value. > > So I am not sure what to do next. > > -- > You received this message because you are subscribed to the Google Groups > "weewx-development" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to weewx-development+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/weewx-development/bf89f27d-abb4-4943-a2a9-e3ffbf1a8606n%40googlegroups.com > <https://groups.google.com/d/msgid/weewx-development/bf89f27d-abb4-4943-a2a9-e3ffbf1a8606n%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "weewx-development" group. To unsubscribe from this group and stop receiving emails from it, send an email to weewx-development+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/weewx-development/CAPq0zEC_TYwMdNhsPFQUYsnr-fDZybSYPJLDs9Wb%3DSmgDFrSBA%40mail.gmail.com.
