CODEWITHSUNDEEP
ruby-on-railsrubydebugging
Dope Man
Dope Man

Reputation: 65

Getting started with byebug in Rails

I am making my way from Django to Rails. So far I just created a new Rails app and found in the Gemfile this line:

  # Call 'debugger' anywhere in the code to stop execution and get a
  # debugger console
  gem 'byebug'

How this supposed to work? Is it as straightforward as it said in the comment? I can put debugger somewhere in code and get a debugger console in my browser?

Upvotes: 4

Views: 12407

Answers (2)

aelor
aelor

Reputation: 11126

start rails server

rails s

and monitor the logs.

enter image description here

Now try accessing the page which points to the place where debugger is written in the code The log will stop at a point where you have put the debugger/byebug word.

enter image description here You can print out variables at that instant

update for rails 4

On suggestion of Deivid, I would like to quote him here

drop the --debug flag. You don't need to do anything special to make byebug work in Rails 4. Just require 'byebug' and call byebug

Upvotes: 6

Frederick Cheung
Frederick Cheung

Reputation: 84182

You won't get a debugger in your browser - calling debugger or byebug will drop you into the byebug prompt in the terminal window that was used to run your rails server (note that this is not the same as the rails console - there is a overview of what you can do in the rails debugging guide).

Another tool you may be interested in is the web-console gem (included by default in rails 4.2 and above). This allows you call console (in a controller, view etc.) and will dump you into a browser based IRB session at that point

Upvotes: 2

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