Ruby on Rails: Debugging

Introduction

• Debugging and fixing errors on Ruby on Rails applications
• What you should know
• Why debugging?

1. Backtraces

• Reading backtraces
• Unlocking full backtraces
• Challenge: Backtraces
• Solution: Backtraces

2. Debugging in Templates

• Debugging variables
• Debugging functions
• Debugging objects

3. Binary Searching

• Binary searching your code
• Manual binary searching in tests
• Automatic binary searching in tests
• Binary searching in Git
• Automatic binary searching in Git

4. Logging

• Using logs
• Logging: Practical case in a test
• Logging: Practical case fixing N+1

5. Interactive Debugging

• Introduction to the debug gem
• Navigating the execution flow
• Adding breakpoints
• Integrating with Visual Studio Code
• Using the web-console gem

6. Fixing Common Errors and Researching

• Fixing the most common errors when using Ruby on Rails
• Researching on the internet

Conclusion

• Putting it all together
• Next steps