Show pending migrations in rails

🚂 How to Show Pending Migrations in Rails? 🕒

So, you're building your awesome Rails app, and it's time to deploy your latest features. But wait, do you know if there are any pending migrations that still need to be run before going live? Don't worry! In this blog post, we'll show you how to easily check for pending migrations in your Rails application. 🙌

🤔 The Problem

The question we often encounter is whether there's a handy rake task to display pending migrations in a Rails app. Sometimes, it can be a challenge to keep track of all the migrations that are yet to be executed, especially in larger projects with numerous contributors. Knowing which migrations are pending is crucial to ensuring a smooth deployment process and avoiding potential conflicts. 🚧

🔍 The Solution

Good news! Rails provides a straightforward solution to this problem in the form of a simple rake task. To display the pending migrations in your Rails app, run the following command in your terminal:

rails db:migrate:status

This command will present you with a clear overview of the pending migrations, showing their timestamp, version, and name. You'll quickly see the status of each migration, whether it's pending, migrated, or missing. 😎

🧩 Example Output

To help you better understand the output of the db:migrate:status command, let's consider an example scenario. Imagine you have three pending migrations:

1. 20210504120000_create_users.rb
2. 20210515150000_add_email_to_users.rb
3. 20210601103000_add_admin_to_users.rb

When you run rails db:migrate:status, the output might look something like this:

Status   Migration ID    Migration Name
--------------------------------------------------
  down    20210504120000  Create users
  down    20210515150000  Add email to users
  down    20210601103000  Add admin to users

In this example, all three migrations are pending as indicated by the "down" status. You can now easily identify which migrations need to be executed before deployment. ✅

💡 Pro Tip

If you find yourself constantly checking for pending migrations, you can create a custom rake task or a simple script to automate the process. This way, you won't have to remember the exact command every time. Make your developer life easier by adding a task like rake db:check_migrations that includes the db:migrate:status command internally! 🤓

📣 Your Turn!

Now that you know how to show pending migrations in Rails, go ahead and try it out in your own app. Take a moment to run rails db:migrate:status and see if you have any pending migrations lurking around. Share your experience or any questions you have in the comments below! Let's keep those migrations in check and ensure smooth deployments for everyone! 🚀