config__initializers__eager_load_association_with_interpolation.rb

# This patch enables access to the records being preloaded when eager loading
# an association whose conditions use interpolation to call class methods.

module ActiveRecord::AssociationPreload::ClassMethods
  [:has_and_belongs_to_many, :has_one, :has_many, :belongs_to].each do |type|
    define_method "preload_#{type}_association_with_access_to_records" do |records, reflection, *args|
      @records_to_preload_for_reflection ||= {}
      @records_to_preload_for_reflection[reflection] = records
      send "preload_#{type}_association_without_access_to_records", records, reflection, *args
      @records_to_preload_for_reflection.delete reflection
    end
    alias_method_chain "preload_#{type}_association", :access_to_records
  end

  def append_conditions_with_access_to_records reflection, *args
    @records_to_preload = @records_to_preload_for_reflection[reflection]
    sql = append_conditions_without_access_to_records reflection, *args
    remove_instance_variable :@records_to_preload
    sql
  end
  alias_method_chain :append_conditions, :access_to_records
end