UPDATE

farm_data/tests/test_farm_detail_api.py

@@ -7,7 +7,12 @@ from rest_framework.test import APIClient
 
 from location_data.models import SoilDepthData, SoilLocation
 from farm_data.models import PlantCatalogSnapshot, SensorData, SensorParameter
-from farm_data.services import assign_farm_plants_from_backend_ids
+from farm_data.services import (
+    assign_farm_plants_from_backend_ids,
+    get_canonical_farm_record,
+    get_runtime_plant_for_farm,
+    list_runtime_plants_for_farm,
+)
 from irrigation.models import IrrigationMethod
 from weather.models import WeatherForecast
 
@@ -77,6 +82,25 @@ class FarmDetailApiTests(TestCase):
         )
         assign_farm_plants_from_backend_ids(self.farm, [self.plant2.backend_plant_id, self.plant1.backend_plant_id])
 
+    def test_canonical_plant_runtime_path_uses_assignments_not_legacy_relation(self):
+        farm = get_canonical_farm_record(str(self.farm_uuid))
+
+        self.assertIsNotNone(farm)
+        self.assertEqual([plant.name for plant in list_runtime_plants_for_farm(farm)], ["خیار", "گوجه‌فرنگی"])
+        self.assertEqual(get_runtime_plant_for_farm(farm).name, "خیار")
+
+    def test_assignment_sync_reconciles_legacy_relation_for_transition(self):
+        self.assertEqual(list(self.farm.plants.values_list("name", flat=True)), ["خیار", "گوجه‌فرنگی"])
+
+    def test_runtime_plant_lookup_resolves_by_name_from_canonical_assignments(self):
+        farm = get_canonical_farm_record(str(self.farm_uuid))
+
+        resolved = get_runtime_plant_for_farm(farm, plant_name="گوجه‌فرنگی")
+
+        self.assertIsNotNone(resolved)
+        self.assertEqual(resolved.name, "گوجه‌فرنگی")
+        self.assertEqual(resolved.id, self.plant1.backend_plant_id)
+
     def test_returns_farm_detail_and_prioritizes_sensor_metrics_over_soil(self):
         response = self.client.get(f"/api/farm-data/{self.farm_uuid}/detail/")