Ruby on Rails: Debugging

1h 6mIntermediate2022-06-17

Authors

David Morales

Web Developer, Technical Instructor

Course details

Fixing bugs is one of the most in-demand (and frustrating) skills for developers. Just when your application seems to be running smoothly—a bug appears. Where did it come from? Is it your code? A bug in the framework? Where do you even start looking for the solution? In this course, David Morales takes a hands-on approach to guide you through techniques and tools you can use to fix bugs with ease. Bugs may be unavoidable, but learning David’s bug detection and troubleshooting techniques can give you confidence and skills that are in demand today for any Ruby on Rails developer.

Skills covered

Ruby on RailsBack-End Web DevelopmentFull-Stack Web DevelopmentWeb DevelopmentOpen SourceDeep Dive (X:Y)

Concepts

0. Introduction

01 - Debugging and fixing errors on Ruby on Rails applications
02 - What you should know
03 - Why debugging

1. Backtraces

04 - Reading backtraces
05 - Unlocking full backtraces
06 - Challenge - Backtraces
07 - Solution - Backtraces

2. Debugging in Templates

08 - Debugging variables
09 - Debugging functions
10 - Debugging objects

3. Binary Searching

11 - Binary searching your code
12 - Manual binary searching in tests
13 - Automatic binary searching in tests
14 - Binary searching in Git
15 - Automatic binary searching in Git

4. Logging

16 - Using logs
17 - Logging - Practical case in a test
18 - Logging - Practical case fixing N+1

5. Interactive Debugging

19 - Introduction to the debug gem
20 - Navigating the execution flow
21 - Adding breakpoints
22 - Integrating with Visual Studio Code
23 - Using the web-console gem

6. Fixing Common Errors and Researching

24 - Fixing the most common errors when using Ruby on Rails
25 - Researching on the internet

Conclusion

26 - Putting it all together
27 - Next steps