Learning Rails 5 by J. Mark Locklear

Author:J. Mark Locklear
Language: eng
Format: epub
Publisher: O'Reilly Media
Published: 2016-08-15T16:00:00+00:00

Debug and Debugger

The console is fun for tinkering and can be extremely useful for trying things out, but it’s a completely separate process from the way you (and your users) normally run Rails applications.

If you’d rather do your debugging within a normal web-served Rails, the most common current approach uses the Rails debugger. Previous versions of Rails required a separate gem install, but Rails 5 comes with the debugger already installed via the byebug gem in your Gemfile. The debug method will return an HTML <pre> tag that renders an object in YAML format. Notice what happens when we add the debug statement to the following show view:

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