Make SensorReadings a timescaledb table

requirements/base.txt

@@ -78,3 +78,6 @@ django-braces==1.14.0
 django-oauth-toolkit==1.2.0
 
 future==0.18.3
+
+# db
+django-timescaledb

seed/migrations/0211_auto_20240105_1306.py

@@ -0,0 +1,23 @@
+# Generated by Django 3.2.23 on 2024-01-05 21:06
+
+import timescale.db.models.fields
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('seed', '0210_natural_sort'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='sensorreading',
+            name='timestamp',
+            field=timescale.db.models.fields.TimescaleDateTimeField(interval='1 second'),
+        ),
+        migrations.AlterUniqueTogether(
+            name='sensor',
+            unique_together={('data_logger', 'column_name'), ('data_logger', 'display_name')},
+        ),
+    ]

seed/models/sensors.py

@@ -4,6 +4,7 @@
 See also https://github.com/seed-platform/seed/main/LICENSE.md
 """
 from django.db import models
+from timescale.db.models.fields import TimescaleDateTimeField
 
 from seed.models import Property
 
@@ -44,13 +45,15 @@ class Sensor(models.Model):
     column_name = models.CharField(max_length=255)
 
     class Meta:
-        unique_together = ('data_logger', 'display_name')
-        unique_together = ('data_logger', 'column_name')
+        unique_together = (
+            ('data_logger', 'display_name'),
+            ('data_logger', 'column_name'),
+        )
 
 
 class SensorReading(models.Model):
     reading = models.FloatField(null=True)
-    timestamp = models.DateTimeField()
+    timestamp = TimescaleDateTimeField(interval="1 second")
     sensor = models.ForeignKey(
         Sensor,
         on_delete=models.CASCADE,