feat: add per-deployment timezone metadata

ami/main/admin.py

@@ -131,6 +131,7 @@ class DeploymentAdmin(admin.ModelAdmin[Deployment]):
     list_display = (
         "name",
         "project",
+        "time_zone",
         "data_source_uri",
         "captures_count",
         "captures_size",
@@ -142,6 +143,7 @@ class DeploymentAdmin(admin.ModelAdmin[Deployment]):
     search_fields = (
         "id",
         "name",
+        "time_zone",
     )
 
     def start_date(self, obj) -> str | None:

ami/main/api/serializers.py

@@ -186,6 +186,7 @@ class Meta:
             "updated_at",
             "latitude",
             "longitude",
+            "time_zone",
             "first_date",
             "last_date",
             "device",
@@ -235,6 +236,7 @@ class Meta:
             "id",
             "name",
             "details",
+            "time_zone",
         ]
 
 
@@ -248,6 +250,7 @@ class Meta:
             "details",
             "latitude",
             "longitude",
+            "time_zone",
             "events_count",
             # "captures_count",
             # "detections_count",

ami/main/migrations/0083_deployment_time_zone.py

@@ -0,0 +1,23 @@
+# Generated by Django 4.2.10
+
+import ami.main.models
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("main", "0082_add_taxalist_permissions"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="deployment",
+            name="time_zone",
+            field=models.CharField(
+                default="America/New_York",
+                help_text="IANA time zone identifier (e.g. 'America/New_York', 'Europe/London').",
+                max_length=63,
+                validators=[ami.main.models.validate_time_zone],
+            ),
+        ),
+    ]

ami/main/models.py

@@ -6,6 +6,7 @@
 import time
 import typing
 import urllib.parse
+import zoneinfo
 from io import BytesIO
 from typing import Final, final  # noqa: F401
 
@@ -680,6 +681,22 @@ def _compare_totals_for_sync(deployment: "Deployment", total_files_found: int):
         )
 
 
+def validate_time_zone(value):
+    """Validate that value is a recognized IANA time zone identifier."""
+    if not isinstance(value, str) or not value:
+        raise ValidationError("Time zone must be a non-empty string.")
+    cleaned = value.strip()
+    if cleaned != value:
+        raise ValidationError("Time zone must not contain leading or trailing whitespace.")
+    try:
+        zoneinfo.ZoneInfo(cleaned)
+    except (KeyError, zoneinfo.ZoneInfoNotFoundError) as exc:
+        raise ValidationError(
+            "%(value)s is not a valid IANA time zone.",
+            params={"value": value},
+        ) from exc
+
+
 @final
 class Deployment(BaseModel):
     """
@@ -690,6 +707,12 @@ class Deployment(BaseModel):
     description = models.TextField(blank=True)
     latitude = models.FloatField(null=True, blank=True)
     longitude = models.FloatField(null=True, blank=True)
+    time_zone = models.CharField(
+        max_length=63,
+        default=settings.TIME_ZONE,
+        validators=[validate_time_zone],
+        help_text="IANA time zone identifier (e.g. 'America/New_York', 'Europe/London').",
+    )
     image = models.ImageField(upload_to="deployments", blank=True, null=True)
 
     project = models.ForeignKey(Project, on_delete=models.SET_NULL, null=True, related_name="deployments")

ami/main/tests.py

@@ -4,6 +4,7 @@
 from io import BytesIO
 
 from django.contrib.auth.models import AnonymousUser
+from django.core.exceptions import ValidationError
 from django.core.files.uploadedfile import SimpleUploadedFile
 from django.db import connection, models
 from django.test import TestCase, override_settings
@@ -15,6 +16,11 @@
 
 from ami.exports.models import DataExport
 from ami.jobs.models import VALID_JOB_TYPES, Job
+from ami.main.api.serializers import (
+    DeploymentListSerializer,
+    DeploymentNestedSerializer,
+    DeploymentNestedSerializerWithLocationAndCounts,
+)
 from ami.main.models import (
     Classification,
     Deployment,
@@ -3744,3 +3750,87 @@ def test_list_pipelines_public_project_non_member(self):
         self.client.force_authenticate(user=non_member)
         response = self.client.get(url)
         self.assertEqual(response.status_code, status.HTTP_200_OK)
+
+
+class TestDeploymentTimeZone(TestCase):
+    """Tests for Deployment.time_zone field validation and serializer exposure."""
+
+    @classmethod
+    def setUpTestData(cls):
+        cls.project, cls.deployment = setup_test_project(reuse=False)
+
+    def test_valid_iana_zones_accepted(self):
+        for tz in ["Europe/London", "Asia/Tokyo", "UTC", "US/Eastern", "Etc/GMT+5"]:
+            self.deployment.time_zone = tz
+            self.deployment.full_clean()
+
+    def test_invalid_zone_rejected(self):
+        for bad in ["Fake/Zone", "Not_A_Zone", "123"]:
+            self.deployment.time_zone = bad
+            with self.assertRaises(ValidationError):
+                self.deployment.full_clean()
+
+    def test_empty_string_rejected(self):
+        self.deployment.time_zone = ""
+        with self.assertRaises(ValidationError):
+            self.deployment.full_clean()
+
+    def test_none_rejected(self):
+        self.deployment.time_zone = None
+        with self.assertRaises(ValidationError):
+            self.deployment.full_clean()
+
+    def test_whitespace_padded_rejected(self):
+        self.deployment.time_zone = " UTC "
+        with self.assertRaises(ValidationError):
+            self.deployment.full_clean()
+
+    def test_default_is_america_new_york(self):
+        d = Deployment(name="tz-default-test", project=self.project)
+        self.assertEqual(d.time_zone, "America/New_York")
+
+    def test_list_serializer_includes_time_zone(self):
+        self.assertIn("time_zone", DeploymentListSerializer.Meta.fields)
+
+    def test_nested_serializer_includes_time_zone(self):
+        self.assertIn("time_zone", DeploymentNestedSerializer.Meta.fields)
+
+    def test_nested_with_location_serializer_includes_time_zone(self):
+        self.assertIn("time_zone", DeploymentNestedSerializerWithLocationAndCounts.Meta.fields)
+
+
+class TestDeploymentTimeZoneAPI(APITestCase):
+    """Tests for Deployment.time_zone via the REST API."""
+
+    def setUp(self):
+        self.user = User.objects.create_superuser(email="tz-test@insectai.org", is_staff=True)
+        self.client.force_authenticate(user=self.user)
+        self.project, self.deployment = setup_test_project(reuse=False)
+
+    def test_api_rejects_invalid_time_zone(self):
+        url = f"/api/v2/deployments/{self.deployment.pk}/"
+        response = self.client.patch(url, {"time_zone": "Fake/Zone"}, format="json")
+        self.assertEqual(response.status_code, status.HTTP_400_BAD_REQUEST)
+
+    def test_api_accepts_valid_time_zone(self):
+        url = f"/api/v2/deployments/{self.deployment.pk}/"
+        response = self.client.patch(url, {"time_zone": "Europe/Berlin"}, format="json")
+        self.assertEqual(response.status_code, status.HTTP_200_OK)
+        self.deployment.refresh_from_db()
+        self.assertEqual(self.deployment.time_zone, "Europe/Berlin")
+
+    def test_api_list_includes_time_zone(self):
+        url = f"/api/v2/deployments/?project_id={self.project.pk}"
+        response = self.client.get(url)
+        self.assertEqual(response.status_code, status.HTTP_200_OK)
+        results = response.data["results"]
+        row = next((r for r in results if r["id"] == self.deployment.pk), None)
+        self.assertIsNotNone(row)
+        self.assertEqual(row["time_zone"], "America/New_York")
+
+    def test_api_detail_includes_time_zone(self):
+        url = f"/api/v2/deployments/{self.deployment.pk}/"
+        response = self.client.get(url)
+        self.assertEqual(response.status_code, status.HTTP_200_OK)
+        self.assertIn("time_zone", response.data)
+        self.assertEqual(response.data["time_zone"], "America/New_York")