fix: add unique constraint to test flag bridge (#414)

* fix: add unique constraint to test flag bridge

* fix: tests

shared/django_apps/reports/migrations/0030_testflagbridge_reports_test_results_flag_bridge_flag_test.py

@@ -0,0 +1,28 @@
+# Generated by Django 4.2.16 on 2024-11-05 20:47
+
+from django.db import migrations, models
+
+"""
+BEGIN;
+--
+-- Create constraint reports_test_results_flag_bridge_flag_test on model testflagbridge
+--
+ALTER TABLE "reports_test_results_flag_bridge" ADD CONSTRAINT "reports_test_results_flag_bridge_flag_test" UNIQUE ("flag_id", "test_id");
+COMMIT;
+"""
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("reports", "0029_alter_dailytestrollup_branch"),
+    ]
+
+    operations = [
+        migrations.AddConstraint(
+            model_name="testflagbridge",
+            constraint=models.UniqueConstraint(
+                fields=("flag", "test"),
+                name="reports_test_results_flag_bridge_flag_test",
+            ),
+        ),
+    ]

shared/django_apps/reports/models.py

@@ -466,3 +466,9 @@ class TestFlagBridge(models.Model):
     class Meta:
         app_label = REPORTS_APP_LABEL
         db_table = "reports_test_results_flag_bridge"
+        constraints = [
+            models.UniqueConstraint(
+                fields=["flag", "test"],
+                name="reports_test_results_flag_bridge_flag_test",
+            )
+        ]