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Class variable usage

Reports the use of class variables. Class variables form a part of the global runtime state and make it easy to create hidden dependencies accidentally. This can make the system error-prone, and it is recommended to avoid using class variables.

Inspired by 'Reek Code Smells'

Locating this inspection

By ID

Can be used to locate inspection in e.g. Qodana configuration files, where you can quickly enable or disable it, or adjust its settings.

RubyClassVariableUsageInspection
Via Settings dialog

Path to the inspection settings via IntelliJ Platform IDE Settings dialog, when you need to adjust inspection settings directly from your IDE.

Settings or Preferences | Editor | Inspections | Ruby | Code style issues

Inspection ID: RubyClassVariableUsageInspection

Suppressing Inspection

You can suppress this inspection by placing the following comment marker before the code fragment where you no longer want messages from this inspection to appear:

//noinspection RubyClassVariableUsageInspection

More detailed instructions as well as other ways and options that you have can be found in the product documentation:

Inspection Details

By default bundled with:

Qodana for Ruby 2025.2, RubyMine 2025.2,

Last modified: 18 September 2025