this is the error: reduce() of empty sequence with no initial value
Request Method: GET Request URL: http://dsfffffffffffffffffffff/search/ Exception Type: TypeError Exception Value: reduce() of empty sequence with no initial value Exception Location: /dsfffffffffffffffffffff/models.py in search, line 59 views.py in searching 68. results = Entry.objects.search(query_string) models.py in search 59. return qs.filter(reduce(operator.or_, q_objects)) On 22 Apr, 09:17, tyrrrr <electioneer...@gmail.com> wrote: > Hi > I am trying to add a search view to an application I wrote in django > but my EntryManager() seems to be getting hung up on the last line of > code when django tries to call the url of the search. > > This EntryManager() (models.py) is excellent for performing searches > in the django shell ($ python manage.py shell) like > > x = Entry.objects.search('spam') > list(x) > > for example > > However when I attempt to visit the url of the search I am met with > the error " reduce() of empty sequence with no initial value " and a > reference to the last line of EntryManager() > > return qs.filter(reduce(operator.or_, q_objects)) > I use this method to strip multiple word queries and place underscores > between the words > > type error: > reduce() of empty sequence with no initial value > > The problems seems to be that the EntryManager() requires a string > from the beginning and I haven't been able to make it work without > one. > > The rest of my code works perfectly. > > Obviously the value will be empty before a query is made. What am I > doing wrong? Is there perhaps a better way to connect my search view > to this object? > > ps: I am aware that this isn't exactly a very efficient, scalable or > long-term solution to my search issue. It is however important that I > get this work as a temporary solution before I move to whoosh/ > haystack. > > Thanks everyone! > > ////////////////////// > models.py > > import operator > from django.db import models > from django.db.models import Q > > class EntryManager(models.Manager): > def search(self, search_terms): > terms = [term.strip() for term in search_terms.split > ()] > q_objects = [] > for term in terms: > q_objects.append(Q(name__icontains=term)) > q_objects.append(Q > (description__icontains=term)) > qs = self.get_query_set() > return qs.filter(reduce(operator.or_, q_objects)) > > ////////////////////// > views.py > > def searching(request): > query_string = '' > if ('q' in request.GET) and request.GET['q'].strip(): > query_string = request.GET['q'].strip() > results = Entry.objects.search(query_string) > return render_to_response("search_results.html", > {'query_string': query_string, 'results' : results}) > > ////////////////////// > search_results.html > > <div>Searched Results</div> > > {%if results%} > {% for e in results%} > <a href=../{{e.slug}}>{{e.name}}</a></div> > {% endfor %} > {% else %} Nothing to see here... > {% endif %} > > ////////////////////// --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Django users" group. To post to this group, send email to django-users@googlegroups.com To unsubscribe from this group, send email to django-users+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/django-users?hl=en -~----------~----~----~----~------~----~------~--~---
