There is a new community resource available on writing “Safe Ecto Migrations”. When we get a migration wrong, it can lock up your production servers with table locks!

This 4 part guide walks through:

• Understanding Ecto migrations and what Postgres is actually doing
• Setting up your mix release project for running migrations
• Recipes for safely making many common changes
• How to safely make batch data changes
• Includes a Github repo with samples!

I hope this becomes a valuable resource for the Elixir community!