From d9e9dc0ab7e5c13ba31bb46c41a33765515e1e40 Mon Sep 17 00:00:00 2001
From: Christoph <34290975+Soliseum@users.noreply.github.com>
Date: Wed, 1 Oct 2025 16:24:25 -0500
Subject: [PATCH] Generate Migration based off Drift

Generate Migration scripts to deploy to lower environments based off Drift.
With and without snapshots.
---
 Drift/Drift_GenerateMigration.ps1          | 15 +++++++++++++++
 Drift/Drift_GenerateMigration_Snapshot.ps1 |  3 +++
 2 files changed, 18 insertions(+)
 create mode 100644 Drift/Drift_GenerateMigration.ps1
 create mode 100644 Drift/Drift_GenerateMigration_Snapshot.ps1

diff --git a/Drift/Drift_GenerateMigration.ps1 b/Drift/Drift_GenerateMigration.ps1
new file mode 100644
index 0000000..ba18b8a
--- /dev/null
+++ b/Drift/Drift_GenerateMigration.ps1
@@ -0,0 +1,15 @@
+# Compare Target Database To schemaModel and apply drift to schemaModel
+# Use case: Compare a live environment (e.g., QA) against the schema model to check for drift.
+# Helpful for identifying differences before deploying migrations.
+
+flyway diff model -diff.source=qa -environments.qa.url="jdbc:postgresql://127.0.0.1:5432/qa" -environments.qa.user="flyway_qa" "-environments.qa.password=Flyway123" -diff.target=schemaModel -environments.qa.schemas="mySchema"
+# Note: Ensure that the 'qa' environment is properly configured in your Flyway configuration file or command line.
+
+# Generate Migrations
+# Use case: Automatically generate versioned and undo migrations after drift is detected.
+# Useful for developers to create migration scripts based on schema changes.
+
+flyway generate "-generate.types=versioned,undo" "-generate.description=dev_updates"
+
+# generate to a specific location
+flyway generate -X -generate.types=versioned,undo -generate.description=dev_updates -generate.location=./outputs/drift
\ No newline at end of file
diff --git a/Drift/Drift_GenerateMigration_Snapshot.ps1 b/Drift/Drift_GenerateMigration_Snapshot.ps1
new file mode 100644
index 0000000..9802b6b
--- /dev/null
+++ b/Drift/Drift_GenerateMigration_Snapshot.ps1
@@ -0,0 +1,3 @@
+flyway snapshot "-source=development" "-filename=C:\Projects\AdventureWorks\snapshots\snapshot.json"
+flyway diff "-source=snapshot:.\snapshots\snapshot.json" "-target=schemaModel" model diffText
+flyway generate -X "-generate.types=versioned,undo" "-generate.description=dev_updates" "-generate.location=./outputs/drift"
\ No newline at end of file