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dynamic_conditional_counters

🔀 Dynamic Counters with Conditional Logic​

When you need to increment counters only for records meeting certain conditions, use a Proc for column_name. This allows skipping updates or targeting different cache columns based on record state. After defining, run counter_culture_fix_counts to backfill existing data.

# app/models/comment.rb
class Comment < ApplicationRecord
  belongs_to :post

  # Only count comments that are not marked as spam
  counter_culture :post,
    column_name: ->(comment) { comment.spam? ? nil : 'comments_count' }
end

# Backfill existing counts
Comment.counter_culture_fix_counts

In this setup, any comment where spam? returns true will be skipped (no nil counter), ensuring your posts.comments_count only reflects legitimate comments.