Debug
RubyMine provides a debugger for Ruby code, including the ERB and HAML files. Debugging Ruby 2.0+ projects requires the debase and ruby-debug-ide gems installed in the project SDK. If these gems are not installed, RubyMine will suggest doing this when you run debugging for the first time.
General debugging procedure
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(Optional) Configure the debugger settings in the page.
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If necessary, create or modify an existing run/debug configuration.
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Place breakpoints in your code.
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During a debug session, examine the program state: see variable values, evaluate expressions, and so on. You can also use the Debug console to do this.