Cannot use global scope defined in ApplicationRecord

[khiav223577]

class ApplicationRecord < ActiveRecord::Base
  scope :contains, lambda {|column, text|
    next where.not(column => nil) if text.blank?
    next where("#{column} ILIKE ?", "%#{sanitize_sql_like(text)}%")
  }
end

ActsAsTaggableOn::Tag.contains(:name, params[:search])
# => NoMethodError (undefined method `contains' for #<ActiveRecord::Relation []>)