On Dec 31, 2011, at 5:17 PM, sungchi wrote:
> If I do that "limitby" range is only in the sort.
> I want to sort on the entire range.
You're right. I can't think of a way to do it in one pass.
>
> On 1월1일, 오전9시17분, Jonathan Lundell <jlund...@pobox.com> wrote:
>> On Dec 31, 2011, at 4:07 PM, sungchi wrote:
>>
>>> Thanks Jonathan!
>>
>>> But, sort() function When using the "limitby" using the "pagination"
>>> to be harder.
>>
>> True. What if you order by (post_time, score) in the request, and then
>> re-sort the result?
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>> On 1월1일, 오전2시11분, Jonathan Lundell <jlund...@pobox.com> wrote:
>>>> On Dec 31, 2011, at 8:46 AM, sungchi wrote:
>>
>>>>> now=time.time()
>>>>> sorts={
>>>>> 'hot':~db.news.hotness,
>>>>> 'score:~db.news.score,
>>>>> 'new':~db.news.post_time}
>>>>> orderby=sorts[sort]
>>>>> limitby=(50,101)
>>>>> news =db(db.news.post_time>(now-25922000.0)).select(limitby=limitby,
>>>>> orderby=orderby)
>>
>>>>> Traceback (most recent call last):
>>>>> File "/Users/web2py/gluon/restricted.py", line 204, in restricted
>>>>> exec ccode in environment
>>>>> File "/Users/web2py/applications/feed9/controllers/default.py", line
>>>>> 352, in <module>
>>>>> File "/User/web2py/gluon/globals.py", line 162, in <lambda>
>>>>> self._caller = lambda f: f()
>>>>> File "/Users/web2py/applications/feed9/controllers/default.py", line
>>>>> 123, in index
>>
>>>>> news=db(db.news.post_time>(now-2592000.0)).select(limitby=limitby,orderby=o
>>>>> rderby)
>>>>> File "/Users/web2py/gluon/dal.py", line 6330, in select
>>>>> return self.db._adapter.select(self.query,fields,attributes)
>>>>> File "/Users/web2py/gluon/dal.py", line 3463, in select
>>>>> (items, tablename, fields) =
>>>>> self.select_raw(query,fields,attributes)
>>>>> File "/Users/sungchi9/Dropbox/python/web2py/gluon/dal.py", line
>>>>> 3458, in select_raw
>>>>> items = items.fetch(limit, offset=offset)
>>>>> File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/
>>>>> GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/
>>>>> google/appengine/ext/db/__init__.py", line 2084, in fetch
>>>>> return list(self.run(limit=limit, offset=offset, **kwargs))
>>>>> File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/
>>>>> GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/
>>>>> google/appengine/ext/db/__init__.py", line 2001, in run
>>>>> raw_query = self._get_query()
>>>>> File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/
>>>>> GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/
>>>>> google/appengine/ext/db/__init__.py", line 2357, in _get_query
>>>>> query.Order(*self.__orderings)
>>>>> File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/
>>>>> GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/
>>>>> google/appengine/api/datastore.py", line 1398, in Order
>>>>> (orderings[0][0], self.__inequality_prop))
>>>>> BadArgumentError: First ordering property must be the same as
>>>>> inequalityfilterproperty, if specified for thisquery; received
>>>>> score, expected post_time
>>
>>>>> what's wrong? why not post_timefilterwithorderbyargument?
>>
>>>> http://code.google.com/appengine/docs/java/datastore/queries.html#Res...
>>
>>>>> If aqueryhas both afilterwith an inequality comparison and one or more
>>>>> sort orders, thequerymust include a sort order for the property used in
>>>>> the inequality, and the sort order must appear before sort orders on
>>>>> other properties.
>>
>>>> Just sort the result in code.
