Thanks Jonathan!
But, sort() function When using the "limitby" using the "pagination"
to be harder.
On 1월1일, 오전2시11분, Jonathan Lundell <jlund...@pobox.com> wrote:
> On Dec 31, 2011, at 8:46 AM, sungchi wrote:
>
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>
> > 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_timefilterwith orderby argument?
>
> 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.
