From a25ddf6c03b691eb2418d64032ce86e4508ed8e7 Mon Sep 17 00:00:00 2001
From: Steve Polito <stevepolito@hey.com>
Date: Tue, 20 Feb 2024 07:36:14 -0500
Subject: [PATCH] Introduce `suspenders:migrate` task

Lifted from our [dotfiles][], this task runs the latest migration, rolls
it back, and runs it again in an effort to ensure it's reversible. More
context can be found [in these comments][].

Unfortunately, this implementation did not work because Rake recognized
that it `db:migrate` was already invoked, so it wasn't invoked a second
time. Instead, we needed to `reenable` the task manually.

```ruby
task migrate: ["db:migrate", "db:rollback", "db:migrate", "db:test:prepare"]
```

[dotfiles]: https://github.com/thoughtbot/dotfiles/blob/f149484269ef98e2bc80b7daa1988e214ddf8e8b/aliases#L12
[in these comments]: https://github.com/thoughtbot/dotfiles/commit/4882c418fd1cb4d052193d4e70a8df316e6cf9c6#r1933964
---
 NEWS.md                   |  1 +
 README.md                 |  9 +++++++++
 lib/tasks/suspenders.rake | 11 +++++++++++
 3 files changed, 21 insertions(+)

diff --git a/NEWS.md b/NEWS.md
index b9d879e86..349dbb106 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -12,6 +12,7 @@ Unreleased
 * Introduce `suspenders:views` generator
 * Introduce `suspenders:setup` generator
 * Introduce `suspenders:tasks` generator
+* Introduce `suspenders:migrate` task
 
 20230113.0 (January, 13, 2023)
 
diff --git a/README.md b/README.md
index c32f3554b..d274bcd37 100644
--- a/README.md
+++ b/README.md
@@ -150,6 +150,15 @@ Creates local Rake tasks for development
 bin/rails dev:prime
 ```
 
+#### Suspenders Tasks
+
+Custom Suspenders tasks
+
+```
+bin/rails suspenders:rake
+bin/rails suspenders:migrate
+```
+
 ## Contributing
 
 See the [CONTRIBUTING] document.
diff --git a/lib/tasks/suspenders.rake b/lib/tasks/suspenders.rake
index 2a76754b5..5cbae9cf4 100644
--- a/lib/tasks/suspenders.rake
+++ b/lib/tasks/suspenders.rake
@@ -9,4 +9,15 @@ namespace :suspenders do
       Rake::Task[:standard].invoke
     end
   end
+
+  desc "Ensure a migration is reversible"
+  task :migrate do
+    Rake::Task["db:migrate"].invoke
+    Rake::Task["db:rollback"].invoke
+
+    Rake::Task["db:migrate"].reenable
+    Rake::Task["db:migrate"].invoke
+
+    Rake::Task["db:test:prepare"].invoke
+  end
 end