UPDATE

crop_simulation/growth_simulation.py

@@ -10,8 +10,8 @@ import logging
 from django.apps import apps
 from django.core.paginator import EmptyPage, Paginator
 
-from farm_data.models import SensorData
-from farm_data.services import get_canonical_farm_record, get_runtime_plant_for_farm
+from farm_data.models import PlantCatalogSnapshot, SensorData
+from farm_data.services import clone_snapshot_as_runtime_plant, get_canonical_farm_record, get_runtime_plant_for_farm
 from location_data.satellite_snapshot import build_location_satellite_snapshot
 from plant.gdd import calculate_daily_gdd, resolve_growth_profile
 from weather.models import WeatherForecast
@@ -277,9 +277,11 @@ def _resolve_plant_simulation_defaults(plant: Any) -> tuple[dict[str, Any] | Non
 
 def build_growth_context(payload: dict[str, Any]) -> GrowthSimulationContext:
     plant_name = apps.get_app_config("plant").resolve_plant_name(payload["plant_name"]) or payload["plant_name"]
-    from plant.models import Plant
-
-    plant = Plant.objects.filter(name=plant_name).first()
+    snapshot = (
+        PlantCatalogSnapshot.objects.filter(name=plant_name).first()
+        or PlantCatalogSnapshot.objects.filter(name__iexact=plant_name).first()
+    )
+    plant = clone_snapshot_as_runtime_plant(snapshot)
     if plant is None:
         raise GrowthSimulationError("Plant not found.")
 

crop_simulation/test_growth_simulation_api.py

@@ -6,7 +6,7 @@ from unittest.mock import patch
 from django.test import TestCase, override_settings
 from rest_framework.test import APIClient
 
-from plant.models import Plant
+from farm_data.models import PlantCatalogSnapshot
 
 from .growth_simulation import paginate_growth_stages, run_growth_simulation
 
@@ -15,7 +15,8 @@ from .growth_simulation import paginate_growth_stages, run_growth_simulation
 class PlantGrowthSimulationApiTests(TestCase):
     def setUp(self):
         self.client = APIClient()
-        self.plant = Plant.objects.create(
+        self.plant = PlantCatalogSnapshot.objects.create(
+            backend_plant_id=301,
             name="گوجه‌فرنگی",
             growth_profile={
                 "base_temperature": 10,

crop_simulation/tests.py

@@ -12,6 +12,7 @@ from rest_framework.test import APIRequestFactory
 
 from .models import SimulationRun, SimulationScenario
 from farm_data.models import PlantCatalogSnapshot, SensorData
+from farm_data.services import assign_farm_plants_from_backend_ids
 from irrigation.models import IrrigationMethod
 from location_data.models import SoilLocation
 from weather.models import WeatherForecast
@@ -393,7 +394,7 @@ class CropSimulationCanonicalSnapshotTests(TestCase):
             weather_forecast=self.weather,
             irrigation_method=self.irrigation_method,
         )
-        self.farm.plants.add(self.plant)
+        assign_farm_plants_from_backend_ids(self.farm, [self.plant.backend_plant_id])
 
     @patch("crop_simulation.services.build_ai_farm_snapshot")
     def test_build_simulation_payload_from_farm_uses_aggregated_metrics(self, mock_snapshot):