diff -r 0c96f2c5603e -r 8f47c67c6d28 web/hdalab/views/ajax.py
--- a/web/hdalab/views/ajax.py	Thu Mar 15 16:37:28 2012 +0100
+++ b/web/hdalab/views/ajax.py	Mon Mar 19 16:32:36 2012 +0100
@@ -9,14 +9,14 @@
 from django.db.models import Q, Count
 from django.http import HttpResponse
 from hdabo.models import Tag, Datasheet, TaggedSheet
-from hdalab.models import (TagLinks, HdaSession, Country, TagYears, 
-    DatasheetExtras)
+from hdalab.models import HdaSession, Country, TagYears, DatasheetExtras
 from hdalab.models.dataviz import DbpediaFieldsTranslation, DbpediaFields
+from hdalab.utils import fix_cache_key
+import copy
 import django.utils.simplejson as json
 import hmac
 import itertools
 import uuid
-from hdalab.utils import fix_cache_key
 
 def taginfo(request):
     label = request.GET.get('label', None)
@@ -182,6 +182,7 @@
         labeltranslations = []
     
         if label or periode or country or contentlist :
+            matchtagqslist = []
             
             if periode:
                 years = periode.split(",")
@@ -196,34 +197,38 @@
                                                 years__end_year__lte = maxend,
                                                 years__start_year__gte = minstart,
                                                 )
-                matchtagids += [t.id for t in matchtagqs]
-                contentqs = contentqs.filter(taggedsheet__tag__in = matchtagqs,
-                               taggedsheet__order__lte = max_tag_order)
+                matchtagqslist.append(matchtagqs)
                 
             if label:
-                masters = []
                 for txtlbl in label.split(","):
                     matchtagqs = Tag.objects.select_related('dbpedia_fields').filter(~Q(dbpedia_uri = None), label__iexact = txtlbl.strip())
-                    for t in matchtagqs:
-                        if t.id not in matchtagids:
-                            matchtagids.append(t.id)
-                        if t.dbpedia_fields:
-                            masters.append(t.dbpedia_fields)
-                        
-                    contentqs = contentqs.filter(taggedsheet__tag__in = matchtagqs,
-                                   taggedsheet__order__lte = max_tag_order)
-                translationqs = DbpediaFieldsTranslation.objects.select_related("master", "master__tag").filter(master__in = masters, language_code=request.LANGUAGE_CODE)    
-                labeltranslations = [{'label':t.master.label, 'translated_label':t.label} for t in translationqs]
+                    matchtagqslist.append(matchtagqs)
                 
             if country:
                 for country_uri in country.split(","):
                     matchtagqs = Tag.objects.filter(~Q(dbpedia_uri = None),locatedin__country__dbpedia_uri = country_uri)
                     matchtagids += [t.id for t in matchtagqs if t.id not in matchtagids]
-                    contentqs = contentqs.filter(taggedsheet__tag__in = matchtagqs,
-                                   taggedsheet__order__lte = max_tag_order)
+                    matchtagqslist.append(matchtagqs)
             if contentlist:
                 contentqs = contentqs.filter(id__in = contentlist.split(","))
-                
+
+            tagcond = None
+            tagcondid = None
+            for matchtagqs in matchtagqslist:
+                newcond = Q(id__in = TaggedSheet.objects.filter(tag__in = copy.deepcopy(matchtagqs), order__lte = max_tag_order).values('datasheet_id'))
+                newcondid = Q(id__in = matchtagqs)
+                tagcond = newcond if tagcond is None else (tagcond & newcond)
+                tagcondid = newcondid if tagcondid is None else (tagcondid | newcondid)
+            
+            contentqs = contentqs.filter(tagcond).distinct()
+            matchtagidsqs = list(Tag.objects.select_related("dbpedia_fields").only("id").filter(tagcondid))
+            matchtagids = [t.id for t in matchtagidsqs]            
+            masters = [t.dbpedia_fields for t in matchtagidsqs if t.dbpedia_fields is not None]
+            
+            translationqs = DbpediaFieldsTranslation.objects.select_related("master", "master__tag").filter(master__in = masters, language_code=request.LANGUAGE_CODE)    
+            labeltranslations = [{'label':t.master.label, 'translated_label':t.label} for t in translationqs]
+
+            
             tagqs = tagqs.filter(datasheet__in = contentqs)
             countryqs = countryqs.filter(includes__tag__taggedsheet__datasheet__in = contentqs)
             discqs = discqs.filter(datasheet__in = contentqs)
@@ -231,7 +236,7 @@
             
         if contentlist is None:
             contentqs.order_by('?')
-                
+                        
         cont_count = contentqs.count()
         
         contenus = dict([(content.id, {'score' : 0, 'tags' : [], 'id':content.id, 'title': content.title, 'description': content.description, 'url': content.url}) for content in contentqs[0:content_count]])