fix error for:

1494: Исправление ошибок
https://expomap.ru/tag/medicinskoe-oborydovanie/

settings/redirect_views.py

@@ -38,32 +38,34 @@ class TagRedirect(RedirectMixin):
     model = Tag
 
     def get_object_url(self, key, value):
-        Model = self.model
-        try:
-            obj = Model.objects.get(old_url=value)
-        except Model.DoesNotExist:
-            try:
-                obj = Model.objects.get(url=value)
-            except Model.DoesNotExist:
-                if value.endwith('-expo'):
-                    value = value.replace('-expo', '')
-                elif value.endwith('-conf'):
-                    value = value.replace('-conf', '')
-
-                obj = get_object_or_404(old_url=value)
-
+        obj = self._get_object(value)
+        if not obj:
+            if value.endswith('-expo'):
+                value = value.replace('-expo', '')
+            elif value.endswith('-conf'):
+                value = value.replace('-conf', '')
+        obj = self._get_object(value)
         if obj:
             return {key: obj.url}
         else:
             raise Http404
 
+    def _get_object(self, value):
+        obj = None
+        try:
+            obj = self.model.objects.get(old_url=value)
+        except self.model.DoesNotExist:
+            try:
+                obj = self.model.objects.get(url=value)
+            except self.model.DoesNotExist:
+                pass
+        return obj
 
 
 class CompanyRedirect(RedirectMixin):
     model = Company
 
 
-
 class EventRedirect(object):
 
     def get_object_url(self,key, value):
@@ -173,4 +175,4 @@ def old_profile(request):
     if user.is_authenticated():
         return HttpResponseRedirect('/%s/'%user.url)
     else:
-        raise Http404
+        raise Http404