UPDATE

farm_data/models.py

@@ -169,6 +169,57 @@ class SensorData(SensorPayloadMixin, models.Model):
         return [assignment.plant for assignment in self.plant_assignments.select_related("plant").order_by("position", "id")]
 
 
+class Device(models.Model):
+    """نسخه نرمال‌شده هر سنسور داخل farm_data_sensordata."""
+
+    farm = models.ForeignKey(
+        SensorData,
+        on_delete=models.CASCADE,
+        related_name="devices",
+        db_column="farm_uuid",
+    )
+    location = models.ForeignKey(
+        "location_data.SoilLocation",
+        on_delete=models.CASCADE,
+        related_name="devices",
+        db_column="location_id",
+        help_text="location مرتبط با این device",
+    )
+    sensor_name = models.CharField(
+        max_length=64,
+        db_index=True,
+        help_text='نام سنسور مثل "sensor-7-1"',
+    )
+    payload = models.JSONField(
+        default=dict,
+        blank=True,
+        help_text="payload همان سنسور",
+    )
+    cluster_uuid = models.UUIDField(
+        null=True,
+        blank=True,
+        db_index=True,
+        help_text="uuid کلاستر داخل location برای این سنسور",
+    )
+    created_at = models.DateTimeField(auto_now_add=True)
+    updated_at = models.DateTimeField(auto_now=True)
+
+    class Meta:
+        db_table = "farm_data_device"
+        ordering = ["sensor_name", "id"]
+        constraints = [
+            models.UniqueConstraint(
+                fields=["farm", "sensor_name"],
+                name="farm_data_unique_device_per_farm_sensor",
+            )
+        ]
+        verbose_name = "device"
+        verbose_name_plural = "devices"
+
+    def __str__(self):
+        return f"{self.farm_id}::{self.sensor_name}"
+
+
 class PlantCatalogSnapshot(models.Model):
     """
     کپی خواندنی از کاتالوگ گیاه Backend برای مصرف ماژول‌های AI.