RubyMine 2019.2 Help


This section describes the procedures that are common for various types of applications.

RubyMine provides a full range of facilities for debugging your source code:

  • Breakpoints in Ruby (including the ERB and HAML files).

  • Breakpoints in JavaScript.

  • Multiple simultaneous debugging sessions.

  • Customizable breakpoint properties: conditions, pass count, and so on.

  • Frames, variables, and watches views in the debugger UI.

  • Runtime evaluation of expressions.


RubyMine requires the debase and ruby-debug-ide gems installed in the project SDK to debug Ruby 2.0+ projects. If these gems are not installed, RubyMine will suggest doing this when you run debugging for the first time.

Install debugging gems

Start a debugging session

  1. Define a run/debug configuration for the application to be debugged.

  2. Create a breakpoint.

  3. Click the Debug <configuration_name> button Debug. Learn more from Starting the Debugger Session.


Customize breakpoint settings

To customize breakpoint settings, press Ctrl+Shift+F8. To see all breakpoints in the project (with additional settings), click More or press the same shortcut Ctrl+Shift+F8 again.

Breakpoint properties

Do not suspend code execution

Use action breakpoints to evaluate a variable at a particular line of code without suspending code execution. To create an action breakpoint, click the gutter while pressing Shift.

Adding an action breakpoint

Create a temporary breakpoint

To create a breakpoint that stops only once, click the left gutter while holding Shift+Alt. For more information, refer to the section Breakpoints.

Disable breakpoints

To disable a breakpoint, click the breakpoint while pressing Alt. Refer to the section Breakpoints for details.

Debugger session

Run to cursor

  1. Create a breakpoint.

  2. Run a debugging session. To run a debugging session, click the Run Application icon (the Run Application icon) in the gutter area and select Debug <configuration_name>.

To stop code execution at the cursor position without adding another breakpoint, click the Run to cursor icon (the Run to cursor icon) or press Alt+F9. Alternatively, you can click the line number in the gutter area.

Run to cursor

The icon Run to Cursor is described in the toolbar reference of the Debug tool window.

Evaluate expression

In the debug mode, you can evaluate an expression by pressing Alt+F8.

The Evaluate dialog supports code completion.

To see how the behavior of various function calls changes during your debugging session, set custom watches. You can read more about watches in Adding, editing and removing watches.

Evaluate dialog

Refer to the section Evaluating Expressions for details.

Configuring debugger settings

To change debugger settings, click File | Settings. In the Settings menu, click Build, Execution, Deployment | Debugger.

Useful debugger shortcuts



Toggle breakpointCtrl+F8
Resume programF9
Step overF8
Step intoF7


View breakpoint details/all breakpointsCtrl+Shift+F8

Debug code at caret

Shift+F9 (within the main method), or Shift+Alt+F9

Remote debug

The final thing you definitely should know about debugging in RubyMine is Remote debug. Remote debug means attaching debugger to a process which is already running on a specific port on your or any other’s host. This way you can attach the debugger to your application server which is running standalone.

To create a remote configuration, go to Edit configurations and add Remote run configuration. Make sure to specify the correct host and port before you run this configuration.

Last modified: 5 September 2019

See Also