rails model on validation custom column name

# app/models/your_model.rb

class YourModel < ApplicationRecord
  validate :custom_column_validation

  private

  def custom_column_validation
    errors.add(:custom_column, 'Your custom validation message') if custom_column_invalid?
  end

  def custom_column_invalid?
    # Add your custom validation logic for the 'custom_column' here
    # Example: Replace the following line with your actual validation condition
    custom_column.blank? || custom_column.length > 10
  end
end