UPDATE

config/__init__.py

@@ -1,3 +1,15 @@
+try:
+    import pymysql
+except ImportError:  # pragma: no cover - optional fallback when mysqlclient is unavailable
+    pymysql = None
+else:  # pragma: no cover - import side effect
+    # Django 5's MySQL backend checks the mysqlclient version string during import.
+    # PyMySQL exposes a legacy compatibility version, so override it before installing
+    # the MySQLdb shim.
+    pymysql.version_info = (2, 2, 1, "final", 0)
+    pymysql.__version__ = "2.2.1"
+    pymysql.install_as_MySQLdb()
+
 try:
     from .celery import app as celery_app
 except ImportError:  # pragma: no cover - fallback for test environments

config/settings.py

@@ -12,7 +12,21 @@ load_dotenv()
 
 BASE_DIR = Path(__file__).resolve().parent.parent
 LOG_DIR = Path(os.environ.get("LOG_DIR", BASE_DIR / "logs"))
-LOG_DIR.mkdir(parents=True, exist_ok=True)
+
+
+def _can_use_file_logging(log_dir: Path) -> bool:
+    try:
+        log_dir.mkdir(parents=True, exist_ok=True)
+        probe_file = log_dir / ".write_test"
+        with probe_file.open("a", encoding="utf-8"):
+            pass
+        probe_file.unlink(missing_ok=True)
+        return True
+    except OSError:
+        return False
+
+
+FILE_LOGGING_ENABLED = _can_use_file_logging(LOG_DIR)
 
 SECRET_KEY = os.environ.get("SECRET_KEY", "django-insecure-dev-only")
 DEBUG = os.environ.get("DEBUG", "0") == "1"
@@ -192,29 +206,34 @@ LOGGING = {
             "class": "logging.StreamHandler",
             "formatter": "standard",
         },
-        "file": {
-            "class": "logging.handlers.TimedRotatingFileHandler",
-            "filename": str(LOG_DIR / "app.log"),
-            "when": "midnight",
-            "backupCount": 14,
-            "encoding": "utf-8",
-            "formatter": "standard",
-        },
     },
     "loggers": {
         "django": {
-            "handlers": ["console", "file"],
+            "handlers": ["console"],
             "level": os.environ.get("DJANGO_LOG_LEVEL", "INFO"),
             "propagate": False,
         },
         "rag": {
-            "handlers": ["console", "file"],
+            "handlers": ["console"],
             "level": os.environ.get("RAG_LOG_LEVEL", "INFO"),
             "propagate": False,
         },
     },
     "root": {
-        "handlers": ["console", "file"],
+        "handlers": ["console"],
         "level": os.environ.get("ROOT_LOG_LEVEL", "INFO"),
     },
 }
+
+if FILE_LOGGING_ENABLED:
+    LOGGING["handlers"]["file"] = {
+        "class": "logging.handlers.TimedRotatingFileHandler",
+        "filename": str(LOG_DIR / "app.log"),
+        "when": "midnight",
+        "backupCount": 14,
+        "encoding": "utf-8",
+        "formatter": "standard",
+    }
+    LOGGING["loggers"]["django"]["handlers"].append("file")
+    LOGGING["loggers"]["rag"]["handlers"].append("file")
+    LOGGING["root"]["handlers"].append("file")

integration_tests/test_reporting_and_ai_api_flow.py

@@ -5,6 +5,7 @@ from types import SimpleNamespace
 from unittest.mock import patch
 import uuid
 
+from django.apps import apps
 from django.test import override_settings
 
 from crop_simulation.models import SimulationRun, SimulationScenario
@@ -206,9 +207,11 @@ class ReportingAndAiJourneyTests(IntegrationAPITestCase):
         broken_simulation_service = SimpleNamespace(
             get_water_stress=lambda **_kwargs: (_ for _ in ()).throw(RuntimeError("simulation offline"))
         )
-        with patch(
-            "irrigation.indicators.apps.get_app_config",
-            return_value=SimpleNamespace(get_water_stress_service=lambda: broken_simulation_service),
+        crop_simulation_app = apps.get_app_config("crop_simulation")
+        with patch.object(
+            crop_simulation_app,
+            "get_water_stress_service",
+            return_value=broken_simulation_service,
         ):
             water_stress_response = self.client.post(
                 "/api/irrigation/water-stress/",
@@ -509,12 +512,22 @@ class ReportingAndAiJourneyTests(IntegrationAPITestCase):
                 "supportingMetrics": {"biomass": 12.1},
             }
         )
-        with patch(
-            "crop_simulation.views.apps.get_app_config",
-            return_value=SimpleNamespace(
-                get_current_farm_chart_simulator=lambda: current_chart_service,
-                get_harvest_prediction_service=lambda: harvest_service,
-                get_yield_prediction_service=lambda: yield_service,
+        crop_simulation_app = apps.get_app_config("crop_simulation")
+        with (
+            patch.object(
+                crop_simulation_app,
+                "get_current_farm_chart_simulator",
+                return_value=current_chart_service,
+            ),
+            patch.object(
+                crop_simulation_app,
+                "get_harvest_prediction_service",
+                return_value=harvest_service,
+            ),
+            patch.object(
+                crop_simulation_app,
+                "get_yield_prediction_service",
+                return_value=yield_service,
             ),
         ):
             current_chart_response = self.client.post(
@@ -539,11 +552,15 @@ class ReportingAndAiJourneyTests(IntegrationAPITestCase):
         task_state: dict[str, object] = {}
 
         def growth_delay_stub(payload):
+            serializable_payload = {
+                **payload,
+                "farm_uuid": str(payload["farm_uuid"]) if payload.get("farm_uuid") else None,
+            }
             scenario = SimulationScenario.objects.create(
                 name=f"integration-{payload['plant_name']}",
                 scenario_type=SimulationScenario.ScenarioType.SINGLE,
                 status=SimulationScenario.Status.SUCCESS,
-                input_payload=payload,
+                input_payload=serializable_payload,
                 result_payload={"engine": "stub"},
             )
             SimulationRun.objects.create(

location_data/migrations/0007_ndviobservation.py

@@ -0,0 +1,46 @@
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("location_data", "0006_remove_soillocation_ideal_sensor_profile"),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name="NdviObservation",
+            fields=[
+                ("id", models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name="ID")),
+                ("observation_date", models.DateField(db_index=True)),
+                ("mean_ndvi", models.FloatField()),
+                ("ndvi_map", models.JSONField(blank=True, default=dict)),
+                ("vegetation_health_class", models.CharField(max_length=64)),
+                ("satellite_source", models.CharField(default="sentinel-2", max_length=64)),
+                ("cloud_cover", models.FloatField(blank=True, null=True)),
+                ("metadata", models.JSONField(blank=True, default=dict)),
+                ("created_at", models.DateTimeField(auto_now_add=True, db_index=True)),
+                (
+                    "location",
+                    models.ForeignKey(
+                        on_delete=django.db.models.deletion.CASCADE,
+                        related_name="ndvi_observations",
+                        to="location_data.soillocation",
+                    ),
+                ),
+            ],
+            options={
+                "verbose_name": "NDVI Observation",
+                "verbose_name_plural": "NDVI Observations",
+                "db_table": "dashboard_data_ndviobservation",
+                "ordering": ["-observation_date", "-created_at"],
+                "constraints": [
+                    models.UniqueConstraint(
+                        fields=("location", "observation_date", "satellite_source"),
+                        name="ndvi_unique_location_date_source",
+                    ),
+                ],
+            },
+        ),
+    ]