* Michael Watkins wrote [2005-09-08 16:18:08 -0700]:
(resent from the right email address...)

Anyone - can you think of reasons why ComputedAttribute's __dict__['value']
could be empty, under the following:

- web app running SCGI, or simple server or medusa server
- 3.0a and 3.0 release Durus
- simple object, something like:

  Pages()

        def get_recent_items(self):
                def compute():
                        result = [page for page in self.items.itervalues()
                                                if page.is_published()]
                        result = attr_sort(result, 'creation_date']
                        return result

                return self._v_recentitems(compute)

where:
- Pages.items is either a dict or Btree()
- no calls to self._v_recentitems.invalidate() made
- get_recent_items() gets called from a _q_index page
- refreshing browser on same page without navigating away invariably causes
  the compute() function to be called again; third refresh is returned
  quickly as get_recent_items() returns from ComputedAttribute cached data.


I've not experienced this when using a python client like 'opendb', and have
also confirmed that this occurs in Durus 2 as well as 3.0x.

Any thoughts or suggestions on where to go from here?

Mike