Ruby on Rails Debugging Debugging Rails Application
Example
To be able to debug an application is very important to understand the flow of an application's logic and data. It helps solving logical bugs and adds value to the programming experience and code quality. Two popular gems for debugging are debugger (for ruby 1.9.2 and 1.9.3) and byebug (for ruby >= 2.x).
For debugging .rb files, follow these steps:
- Add
debuggerorbyebugto thedevelopmentgroup ofGemfile - Run
bundle install - Add
debuggerorbyebugas the breakpoint - Run the code or make request
- See the rails server log stopped at the specified breakpoint
- At this point you can use your server terminal just like
rails consoleand check the values of variable and params - For moving to next instruction, type
nextand pressenter - For stepping out type
cand pressenter
If you want to debug .html.erb files, break point will be added as <% debugger %>
