🚂 Lab 3.1 - Migrations

⏰ Estimated time: 5-15 minutes

We'll learn about migration generators and use them to jump to a specific lab in the workshop.

📚 Learning outcomes:

• Understand the nx migrate command
• Install the @nrwl/nx-workshop package
• Migrate to a specific version
• Modify the migrations.json file
  
  
  

📲 After this workshop, you should have:

App Screenshot

File structure

🏋️‍♀️ Steps:

1. Install an old version of the @nrwl/nx-workshop npm package: nx-workshop@0.0.1

2. Make sure you've committed all your changes to this point: git commit -am "lab 3"

3. Migrate to the latest version of @nrwl/nx-workshop

   🐳 Hint

   nx migrate @nrwl/nx-workshop@latest

   
   

4. Look at the migrations.json file. It contains the generators to complete every lab in the workshop. We don't want to run everything, so let's delete every migration entry except for labs 1 through 3.

5. The migrations.json file should now only contain generators for the first 3 labs. Let's run those migrations: nx migrate --run-migrations.

6. There's also a generator that comes with @nrwl/nx-workshop to help you set up the migrations.json file to complete a specific lab or to complete a range of labs in option 1 or option 2. Experiment with the complete-labs generator so that later on you can catch up if you get stuck on a lab. nx g @nrwl/nx-workshop:complete-labs --help

➡️ Next lab ➡️