Fix facility limit hierarchy display

modules/trade_finance/facility.py

@@ -101,7 +101,8 @@ class Facility(ModelSQL, ModelView):
         depends=['is_tpa'])
 
     limits = fields.One2Many('trade_finance.facility_limit', 'facility',
-        'Limits', domain=[('parent', '=', None)])
+        'Limits', domain=[('parent', '=', None)],
+        filter=[('parent', '=', None)])
     currencies = fields.One2Many('trade_finance.facility_currency', 'facility',
         'Accepted Currencies')
     caps = fields.One2Many('trade_finance.facility_cap', 'facility', 'Caps')

modules/trade_finance/tests/test_module.py

@@ -61,6 +61,34 @@ class TradeFinanceTestCase(ModuleTestCase):
         self.assertEqual(child.date_from, root.date_from)
         self.assertEqual(child.date_to, root.date_to)
 
+    @with_transaction()
+    def test_facility_limits_only_returns_root_limits(self):
+        'Test facility limits exclude nested sublimits'
+        pool = Pool()
+        Facility = pool.get('trade_finance.facility')
+        Limit = pool.get('trade_finance.facility_limit')
+
+        facility, currency = self.create_facility()
+        root, = Limit.create([{
+                    'facility': facility.id,
+                    'name': 'Global limit',
+                    'currency': currency.id,
+                    'amount': Decimal('100.00'),
+                    'date_from': date(2026, 1, 1),
+                    'date_to': date(2026, 12, 31),
+                    }])
+        child, = Limit.create([{
+                    'parent': root.id,
+                    'name': 'Trading limit',
+                    'amount': Decimal('50.00'),
+                    }])
+
+        facility = Facility(facility.id)
+        root = Limit(root.id)
+
+        self.assertEqual(list(facility.limits), [root])
+        self.assertEqual(list(root.children), [child])
+
     @with_transaction()
     def test_sublimit_dates_must_stay_within_parent(self):
         'Test sublimit dates stay within parent dates'