statistics: always allow group by channel (#85530)

tests/api/test_statistics.py

@@ -991,6 +991,10 @@ def test_statistics_forms_count_group_by(pub, formdef, anonymise):
         {'data': [6, None, None], 'label': 'Backoffice'},
     ]
 
+    # group by channel without form filter
+    new_resp = get_app(pub).get(sign_uri('/api/statistics/forms/count/?group-by=channel'))
+    assert new_resp.json['data']['series'] == resp.json['data']['series']
+
     # group by item field without time interval
     resp = get_app(pub).get(sign_uri(url + '&group-by=test-item&time_interval=none'))
     # Foo is first because it has a display value, baz is second because it has not, None is always last
@@ -1100,7 +1104,10 @@ def test_statistics_forms_count_group_by_form(pub):
     assert resp.json['data']['subfilters'][1] == {
         'id': 'group-by',
         'label': 'Group by',
-        'options': [{'id': 'form', 'label': 'Form'}],
+        'options': [
+            {'id': 'channel', 'label': 'Channel'},
+            {'id': 'form', 'label': 'Form'},
+        ],
         'has_subfilters': True,
     }
 
@@ -1726,8 +1733,8 @@ def test_statistics_multiple_forms_count_subfilters(pub, formdef):
     # group-by subfilter shows all common fields
     group_by_filter = [x for x in resp.json['data']['subfilters'] if x['id'] == 'group-by'][0]
     assert group_by_filter['options'] == [
-        {'id': 'form', 'label': 'Form'},
         {'id': 'channel', 'label': 'Channel'},
+        {'id': 'form', 'label': 'Form'},
         {'id': 'simple-status', 'label': 'Simplified status'},
         {'id': 'test-item', 'label': 'Test item'},
         {'id': 'checkbox', 'label': 'Checkbox'},

wcs/statistics/views.py

@@ -383,7 +383,9 @@ class FormsCountView(RestrictedView):
             'id': 'group-by',
             'label': _('Group by'),
             'has_subfilters': True,
-            'options': [],
+            'options': [
+                {'id': 'channel', 'label': _('Channel')},
+            ],
         }
 
         if len(formdefs) != 1:
@@ -430,12 +432,9 @@ class FormsCountView(RestrictedView):
                 subfilter['options'].sort(key=lambda x: x['label'])
 
         group_by_filter = [x for x in common_subfilters if x['id'] == 'group-by'][0]
+        group_by_filter['options'].append({'id': 'simple-status', 'label': _('Simplified status')})
         group_by_filter['options'].extend(
-            [
-                {'id': 'channel', 'label': _('Channel')},
-                {'id': 'simple-status', 'label': _('Simplified status')},
-            ]
-            + [{'id': x['id'].removeprefix('filter-'), 'label': x['label']} for x in subfilters]
+            [{'id': x['id'].removeprefix('filter-'), 'label': x['label']} for x in subfilters]
         )
 
         if group_by not in (None, 'channel', 'simple-status', 'status'):