rollback ci script

.github/workflows/ci.yml

@@ -55,6 +55,11 @@ jobs:
         run: |
           npx prisma generate
           npx prisma migrate deploy || true
+      - name: Test Migration Rollbacks
+        working-directory: ./backend
+        env:
+          DATABASE_URL: postgresql://test:test@localhost:5432/test_db
+        run: npm run test:migrations
       - name: Run tests
         working-directory: ./backend
         env:

backend/package.json

@@ -10,6 +10,7 @@
     "dev": "tsx watch src/index.ts",
     "test": "jest --runInBand --forceExit",
     "test:coverage": "jest --coverage --runInBand --forceExit",
+    "test:migrations": "bash scripts/test-migration-rollback.sh",
     "collaboration": "tsx src/collaborationServer.ts"
   },
   "keywords": [],

backend/scripts/test-migration-rollback.sh

@@ -0,0 +1,66 @@
+#!/bin/bash
+
+# Exit on any error
+set -e
+
+echo "Running Database Migration Rollback Checker..."
+
+# Ensure we are in the backend directory
+cd "$(dirname "$0")/.."
+
+# Check if migrations directory exists
+if [ ! -d "prisma/migrations" ]; then
+  echo "No migrations found. Exiting gracefully."
+  exit 0
+fi
+
+# Find all migrations (excluding migration_lock.toml and any non-directories)
+MIGRATIONS=($(find prisma/migrations -mindepth 1 -maxdepth 1 -type d | sort))
+NUM_MIGRATIONS=${#MIGRATIONS[@]}
+
+if [ "$NUM_MIGRATIONS" -lt 1 ]; then
+  echo "Not enough migrations to test rollback."
+  exit 0
+fi
+
+LATEST_MIGRATION="${MIGRATIONS[$((NUM_MIGRATIONS-1))]}"
+echo "Latest migration is: $(basename "$LATEST_MIGRATION")"
+
+# Prepare N-1 migrations directory
+echo "Preparing previous migration state..."
+rm -rf prisma/migrations_prev
+mkdir -p prisma/migrations_prev
+cp -r prisma/migrations/* prisma/migrations_prev/ 2>/dev/null || true
+rm -rf "prisma/migrations_prev/$(basename "$LATEST_MIGRATION")"
+
+# Make sure database is fully migrated to state N
+echo "Applying all migrations up to state N..."
+npx prisma migrate deploy
+
+# Generate the DOWN migration script by diffing N against N-1
+echo "Generating down migration for $(basename "$LATEST_MIGRATION")..."
+npx prisma migrate diff \
+  --from-migrations prisma/migrations \
+  --to-migrations prisma/migrations_prev \
+  --script > down.sql
+
+echo "Down migration generated:"
+cat down.sql
+
+# Execute the DOWN migration
+echo "Executing down migration..."
+npx prisma db execute --file down.sql --schema prisma/schema.prisma
+
+# Verify the database schema matches state N-1
+echo "Verifying database schema integrity post-rollback..."
+# diff DB vs N-1 migrations. Exit code 0 means no differences (schema matches perfectly).
+npx prisma migrate diff \
+  --from-schema-datasource prisma/schema.prisma \
+  --to-migrations prisma/migrations_prev \
+  --exit-code
+
+echo "Rollback successful! Database schema matches state prior to the latest migration."
+
+# Clean up
+rm -rf prisma/migrations_prev down.sql
+echo "Database Migration Rollback Checker completed successfully."