Rails Error Prevention Skill

This skill provides preventative checklists and error patterns for common Rails mistakes. Review relevant sections BEFORE writing code.

When to Use This Skill

• Before creating ViewComponents
• Before writing ActiveRecord queries with GROUP BY or joins
• Before writing view code that calls component methods
• Before creating controller actions
• When debugging undefined method errors
• When debugging template not found errors
• When debugging ActiveRecord grouping errors

Critical Rule: Method Exposure Verification

This is the #1 cause of runtime errors in Rails applications.