migration(crons): Add MonitorIncident table

src/sentry/monitors/migrations/0001_add_monitorincident_table.py

@@ -0,0 +1,81 @@
+# Generated by Django 3.2.20 on 2023-09-18 17:44
+
+import django.db.models.deletion
+import django.utils.timezone
+from django.db import migrations, models
+
+import sentry.db.models.fields.bounded
+import sentry.db.models.fields.foreignkey
+from sentry.new_migrations.migrations import CheckedMigration
+
+
+class Migration(CheckedMigration):
+    # This flag is used to mark that a migration shouldn't be automatically run in production. For
+    # the most part, this should only be used for operations where it's safe to run the migration
+    # after your code has deployed. So this should not be used for most operations that alter the
+    # schema of a table.
+    # Here are some things that make sense to mark as dangerous:
+    # - Large data migrations. Typically we want these to be run manually by ops so that they can
+    #   be monitored and not block the deploy for a long period of time while they run.
+    # - Adding indexes to large tables. Since this can take a long time, we'd generally prefer to
+    #   have ops run this and not block the deploy. Note that while adding an index is a schema
+    #   change, it's completely safe to run the operation after the code has deployed.
+    is_dangerous = False
+
+    initial = True
+
+    dependencies = [
+        ("sentry", "0554_add_team_replica"),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name="MonitorEnvironment",
+            fields=[
+                (
+                    "id",
+                    sentry.db.models.fields.bounded.BoundedBigAutoField(
+                        primary_key=True, serialize=False
+                    ),
+                ),
+                ("grouphash", models.CharField(max_length=32)),
+                ("date_added", models.DateTimeField(default=django.utils.timezone.now)),
+                (
+                    "closing_checkin",
+                    sentry.db.models.fields.foreignkey.FlexibleForeignKey(
+                        null=True,
+                        on_delete=django.db.models.deletion.CASCADE,
+                        related_name="closed_incidents",
+                        to="sentry.monitorcheckin",
+                    ),
+                ),
+                (
+                    "monitor",
+                    sentry.db.models.fields.foreignkey.FlexibleForeignKey(
+                        on_delete=django.db.models.deletion.CASCADE,
+                        related_name="incidents",
+                        to="sentry.monitor",
+                    ),
+                ),
+                (
+                    "monitor_environment",
+                    sentry.db.models.fields.foreignkey.FlexibleForeignKey(
+                        on_delete=django.db.models.deletion.CASCADE,
+                        related_name="incidents",
+                        to="sentry.monitorenvironment",
+                    ),
+                ),
+                (
+                    "opening_checkin",
+                    sentry.db.models.fields.foreignkey.FlexibleForeignKey(
+                        on_delete=django.db.models.deletion.CASCADE,
+                        related_name="created_incidents",
+                        to="sentry.monitorcheckin",
+                    ),
+                ),
+            ],
+            options={
+                "abstract": False,
+            },
+        ),
+    ]

src/sentry/monitors/models.py

@@ -591,3 +591,17 @@ def check_monitor_environment_limits(sender, instance, **kwargs):
         raise MonitorEnvironmentLimitsExceeded(
             f"You may not exceed {settings.MAX_ENVIRONMENTS_PER_MONITOR} environments per monitor"
         )
+
+
+@region_silo_only_model
+class MonitorEnvironment(Model):
+    __relocation_scope__ = RelocationScope.Excluded
+
+    monitor = FlexibleForeignKey("sentry.Monitor", related_name="incidents")
+    monitor_environment = FlexibleForeignKey("sentry.MonitorEnvironment", related_name="incidents")
+    opening_checkin = FlexibleForeignKey("sentry.MonitorCheckIn", related_name="created_incidents")
+    closing_checkin = FlexibleForeignKey(
+        "sentry.MonitorCheckIn", related_name="closed_incidents", null=True
+    )
+    grouphash = models.CharField(max_length=32)
+    date_added = models.DateTimeField(default=timezone.now)