On Fri, Feb 17, 2012 at 12:13 PM, Tom Evans <[email protected]> wrote: > On Fri, Feb 17, 2012 at 12:00 PM, andreas <[email protected]> wrote: >> Sorry for the vague description, but i find it hard to exactly name >> the problem i am facing. Hopefully my description is clear enough: >> >> I am working on a reporting app that collects and displays events/ >> actions that happened in my application. >> >> I wrote a litte plugin base class and added plugins for all of the >> relevant events i am interested in. >> Basically a plugin only defines the query that is used to return the >> matching events. >> >> Now i am facing the situation that the queries are only evaluated >> once: >> A view that instantiates all my plugins and collects their events >> (get_plugin_data) always returns the same data unless i restart my >> server. >> >> class DigestPluginBase(object): >> >> def get_plugin_data(self): >> if self.queryset: >> data = list(self.queryset) >> else: >> data = [] >> return data >> > class UpdatesNew(DigestPluginBase): > def __init__(self, *args, **kwargs): > self.queryset = > Update.objects.filter(timestamp__gte=yesterday) >> >> Querysets are lazy, so i assume this is a problem with the way i >> assign/define the queryset for my plugin. >> But then i don't see how the old data is stored in my class as the >> there should be a new instance (and new queries) of my class every >> time the view is called. >> So where do i go wrong? >> >> On a side note: Can you think of more elegant ways to define the >> querysets for my plugins? > > FTFY > > How you had it before set a class level attribute. It exists on each > instance, but only as a copy of that on the class. Set it up as an > instance attribute (see inline fix) and it will be recalculated each > time your class is instantiated. > > Cheers > > Tom
Oh, in my rush I failed to spot the variable 'yesterday'. That will only be yesterday when that datetime object was instantiated (not shown in your snippet). You would need to re-instantiate that each time you want to evaluate the queryset. Cheers Tom -- You received this message because you are subscribed to the Google Groups "Django users" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/django-users?hl=en.
