PREQUEL-2025-0080
Ruby NoMethodError - undefined methodMediumImpact: 8/10Mitigation: 4/10
Description
A Ruby application has encountered a NoMethodError exception, indicating that code is attempting to call a method \nthat does not exist for a given object. This typically happens when referencing an undefined method, when method names \nare misspelled, or when interacting with nil/null objects. NoMethodError is one of the most common runtime errors \nin Ruby applications and can cause immediate crashes or unexpected behavior.\n
Mitigation
- Check the stack trace to identify the location and context of the error\n- Verify that the object is of the expected type using methods like .class or .is_a?\n- Add nil checks before calling methods on potentially nil objects\n- Use the .respond_to? method to verify an object supports a method before calling it\n- Consider implementing method_missing for more graceful handling of undefined methods\n- For production environments, wrap critical sections in begin/rescue blocks to handle NoMethodError\n- Implement proper testing, including unit tests that verify method availability\n- Keep dependencies updated to avoid using deprecated or removed methods\n