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Learn how to test Active Jo...
Setup your development environment.
Configure your production server.
Learn how to modify production to run websockets.
Testing integrations with external APIs in your Rails app can be hard. You don't know what requests are being made (or even the responses), so how can you properly mock them out? VCR to the rescue.
Learn how to write integration tests in Rails to test controllers and actions
You can use Fixtures in Rails to create sample database records for your tests to run against. They're easy to setup and extremely quick.
Test Driven Development, or TDD, is a pretty simple process that allows you to write your code in conjunction with tests to ensure a high level of confidence and code coverage.
Race conditions can cause problems with data integrity. We can prevent these issues with Pessimistic Locking in ActiveRecord which uses database row-level locking.
When things (users, jobs, etc) attempt to update the same record at the same time, we can often lose changes. Optimistic locking uses a lock version number to warn you about updating stale objects so you can handle that safely.
Learn how to add support for Accelerated Mobile Pages (AMP) from Google to Ruby on Rails in this tutorial
Reply to inbound SMS and phone calls using TwiML to create XML responses to Twilio conversations
Receiving inbound SMS in Rails with Twilio is very similar to handling inbound emails with Action Mailbox
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