remove FeatureExposure and SimpleMetric models

shared/django_apps/pg_telemetry/migrations/0002_delete_simplemetric.py

@@ -0,0 +1,15 @@
+# Generated by Django 4.2.16 on 2025-03-12 17:24
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("pg_telemetry", "0001_initial"),
+    ]
+
+    operations = [
+        migrations.DeleteModel(
+            name="SimpleMetric",
+        ),
+    ]

shared/django_apps/pg_telemetry/models.py

@@ -1,58 +1 @@
-from django.conf import settings
-from django.db import models
-
-
-class BaseModel(models.Model):
-    """
-    Base model for timeseries metrics. It provides a timestamp field which
-    represents the time that the data sample was captured at and a few metadata
-    fields that we can filter or group by to investigate issues or identify
-    trends.
-
-    This is the Postgres version. After data flows through both Postgres and
-    Timescale for a time, we'll pick one.
-    """
-
-    class Meta:
-        abstract = True
-
-    timestamp = models.DateTimeField(null=False, primary_key=True)
-
-    repo_id = models.BigIntegerField(null=True)
-    owner_id = models.BigIntegerField(null=True)
-    commit_id = models.BigIntegerField(null=True)
-
-    def save(self, *args, **kwargs):
-        if settings.TELEMETRY_VANILLA_DB:
-            kwargs["using"] = settings.TELEMETRY_VANILLA_DB
-            super().save(*args, **kwargs)
-
-
-class SimpleMetric(BaseModel):
-    """
-    Model for the `telemetry_simple` table which houses many simple metrics.
-    Rather than create a bespoke model, table, and db migration for each timer
-    or quantity we want to measure, we put it in `telemetry_simple`.
-
-    Examples could include `list_repos_duration_seconds` or `uploads_processed`
-
-    This is the Postgres version. After data flows through both Postgres and
-    Timescale for a time, we'll pick one.
-    """
-
-    class Meta(BaseModel.Meta):
-        db_table = "telemetry_simple"
-        indexes = [
-            models.Index(
-                fields=[
-                    "name",
-                    "timestamp",
-                    "repo_id",
-                    "owner_id",
-                    "commit_id",
-                ],
-            ),
-        ]
-
-    name = models.TextField(null=False)
-    value = models.FloatField(null=False)
+# TODO: Delete this Django app after deploying the migration to drop its tables

shared/django_apps/rollouts/migrations/0006_delete_featureexposure.py

@@ -0,0 +1,15 @@
+# Generated by Django 4.2.16 on 2025-03-12 17:19
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("rollouts", "0005_featureflag_is_active_featureflag_platform_and_more"),
+    ]
+
+    operations = [
+        migrations.DeleteModel(
+            name="FeatureExposure",
+        ),
+    ]

shared/django_apps/rollouts/models.py

@@ -1,4 +1,3 @@
-from django.core.exceptions import ValidationError
 from django.db import models
 from django_better_admin_arrayfield.models.fields import ArrayField
 
@@ -118,43 +117,3 @@ class Meta:
 
     def __str__(self):
         return self.feature_flag.__str__() + ": " + self.name
-
-
-class FeatureExposure(models.Model):
-    """
-    Represents a feature variant being exposed to an entity (repo or owner) at
-    a point in time. Used to keep track of when features and variants have been enabled
-    and who they affected for experimentation purposes.
-    """
-
-    exposure_id = models.AutoField(primary_key=True)
-    feature_flag = models.ForeignKey(
-        "FeatureFlag", on_delete=models.CASCADE, related_name="exposures"
-    )
-    feature_flag_variant = models.ForeignKey(
-        "FeatureFlagVariant", on_delete=models.CASCADE, related_name="exposures"
-    )
-
-    # Weak foreign keys to Owner and Respository models respectively
-    owner = models.IntegerField(null=True, blank=True)
-    repo = models.IntegerField(null=True, blank=True)
-
-    timestamp = models.DateTimeField(null=False)
-
-    def clean(self):
-        if not self.owner and not self.repo:
-            raise ValidationError(
-                "Exposure must have either a corresponding owner or repo"
-            )
-
-        super(FeatureExposure, self).clean()
-
-    def save(self, *args, **kwargs):
-        self.full_clean()
-        super(FeatureExposure, self).save(*args, **kwargs)
-
-    class Meta:
-        db_table = "feature_exposures"
-        # indexes = [ # don't use indexes for now
-        #     models.Index(fields=['feature_flag', 'timestamp'], name='feature_flag_timestamp_idx'),
-        # ]

tests/unit/django_apps/test_db_routers.py

@@ -2,7 +2,6 @@
 
 from shared.django_apps.codecov_auth.models import Owner
 from shared.django_apps.db_routers import MultiDatabaseRouter
-from shared.django_apps.pg_telemetry.models import SimpleMetric as PgSimpleMetric
 
 
 class TestMultiDatabaseRouter:
@@ -17,7 +16,6 @@ def test_db_for_read_read_replica(self, mocker):
 
         router = MultiDatabaseRouter()
         assert router.db_for_read(Owner) == "timeseries_read"
-        assert router.db_for_read(PgSimpleMetric) == "default_read"
 
     @override_settings(
         TIMESERIES_DATABASE_READ_REPLICA_ENABLED=False,
@@ -30,7 +28,6 @@ def test_db_for_read_no_read_replica(self, mocker):
 
         router = MultiDatabaseRouter()
         assert router.db_for_read(Owner) == "timeseries"
-        assert router.db_for_read(PgSimpleMetric) == "default"
 
     def test_db_for_write(self, mocker):
         # At time of writing, the Django timeseries models don't live in this
@@ -39,7 +36,6 @@ def test_db_for_write(self, mocker):
 
         router = MultiDatabaseRouter()
         assert router.db_for_write(Owner) == "timeseries"
-        assert router.db_for_write(PgSimpleMetric) == "default"
 
     @override_settings(TIMESERIES_ENABLED=True)
     def test_allow_migrate_timeseries_enabled(self):
@@ -72,6 +68,3 @@ def test_allow_relation(self, mocker):
 
         router = MultiDatabaseRouter()
         assert router.allow_relation(Owner, Owner) == True
-        assert router.allow_relation(PgSimpleMetric, Owner) == False
-        assert router.allow_relation(Owner, PgSimpleMetric) == False
-        assert router.allow_relation(PgSimpleMetric, PgSimpleMetric) == True