backoffice: display drafts stats (#72542)

wcs/admin/forms.py

@@ -1769,25 +1769,26 @@ class FormDefPage(Directory, TempfileDirectoryMixin):
             temp_drafts[page_id] += 1
             total_drafts += 1
         drafts = {}
-        for key in ('_unkown', '_confirmation_page', '_first_page'):
-            try:
-                num_drafts = temp_drafts.pop(key)
-            except KeyError:
-                num_drafts = 0
-            drafts[key] = {'total': num_drafts, 'field': None}
-        for page_id, num_drafts in temp_drafts.items():
-            for field in self.formdef.iter_fields(with_backoffice_fields=False):
-                if page_id == field.id and isinstance(field, PageField):
-                    drafts[page_id] = {'total': num_drafts, 'field': field}
-                    break
-            else:
-                drafts['_unkown']['total'] += num_drafts
-        for draft_data in drafts.values():
-            draft_percent = 100 * draft_data['total'] / total_drafts
-            draft_data['percent'] = draft_percent
-            draft_data['percent_rounded'] = '%d' % draft_percent
-        context['drafts'] = sorted(drafts.items(), reverse=True, key=lambda x: x[1]['total'])
-        context['drafts_total'] = total_drafts
+        if total_drafts:
+            for key in ('_unkown', '_confirmation_page', '_first_page'):
+                try:
+                    num_drafts = temp_drafts.pop(key)
+                except KeyError:
+                    num_drafts = 0
+                drafts[key] = {'total': num_drafts, 'field': None}
+            for page_id, num_drafts in temp_drafts.items():
+                for field in self.formdef.iter_fields(with_backoffice_fields=False):
+                    if page_id == field.id and isinstance(field, PageField):
+                        drafts[page_id] = {'total': num_drafts, 'field': field}
+                        break
+                else:
+                    drafts['_unkown']['total'] += num_drafts
+            for draft_data in drafts.values():
+                draft_percent = 100 * draft_data['total'] / total_drafts
+                draft_data['percent'] = draft_percent
+                draft_data['percent_rounded'] = '%d' % draft_percent
+            context['drafts'] = sorted(drafts.items(), reverse=True, key=lambda x: x[1]['total'])
+            context['drafts_total'] = total_drafts
 
         return template.QommonTemplateResponse(
             templates=[self.inspect_template_name],