Use autocomplete for themes in position form

src/memopol/urls.py

@@ -8,6 +8,7 @@ from views.home import HomeView
 from views.autocomplete import (
     ProposalAutocomplete,
     RepresentativeAutocomplete,
+    ThemeAutocomplete,
 )
 
 from views.charts import ThemeScoresJSONView, ChamberScoresJSONView
@@ -132,12 +133,19 @@ urlpatterns = [
         ProposalAutocomplete.as_view(),
         name='proposal-autocomplete',
     ),
+
     url(
         r'^autocomplete/representative/$',
         RepresentativeAutocomplete.as_view(),
         name='representative-autocomplete',
     ),
 
+    url(
+        r'^autocomplete/theme/$',
+        ThemeAutocomplete.as_view(),
+        name='theme-autocomplete',
+    ),
+
 
     # Theme list
 

src/memopol/views/autocomplete.py

@@ -6,6 +6,7 @@ from django.db.models import Q
 
 from representatives.models import Representative
 from representatives_votes.models import Proposal
+from memopol_themes.models import Theme
 
 
 class RepresentativeAutocomplete(autocomplete.Select2QuerySetView):
@@ -32,3 +33,13 @@ class ProposalAutocomplete(autocomplete.Select2QuerySetView):
             )
 
         return qs
+
+
+class ThemeAutocomplete(autocomplete.Select2QuerySetView):
+    def get_queryset(self):
+        qs = Theme.objects.all()
+
+        if self.q:
+            qs = qs.filter(name__icontains=self.q)
+
+        return qs

src/representatives_positions/forms.py

@@ -11,7 +11,9 @@ class PositionForm(forms.ModelForm):
     themes = forms.models.ModelMultipleChoiceField(
         queryset=Theme.objects.all(),
         required=False,
-        widget=forms.CheckboxSelectMultiple
+        widget=ModelSelect2Multiple(
+            url='theme-autocomplete',
+        )
     )
 
     class Meta: