```ruby
class IrsGroup
  include Mongoid::Document
  include Mongoid::Timestamps
  include Mongoid::Versioning
  include Mongoid::Paranoia

  # Unique identifier for this Household used for reporting enrollment and premium tax credits to IRS
  auto_increment :_id

  embedded_in :application_group

  has_many :tax_households
  has_many :hbx_enrollments

  embeds_many :comments
  accepts_nested_attributes_for :comments, reject_if: proc { |attribs| attribs['content'].blank? }, allow_destroy: true


end
```

Refactor embedded models. Add associations between embedded models
user
```ruby
class IrsGroup
  include Mongoid::Document
  include Mongoid::Timestamps

  embedded_in :application_group

  # Unique identifier for this Household used for reporting enrollment and premium tax credits to IRS
  auto_increment :_id, seed: 9999

  embeds_many :comments
  accepts_nested_attributes_for :comments, reject_if: proc { |attribs| attribs['content'].blank? }, allow_destroy: true

  def parent
    self.application_group
  end

  # embedded has_many :tax_households
  def tax_households
    parent.tax_households.where(:irs_group_id => self.id)
  end
 
  # embedded has_many :hbx_enrollments
  def hbx_enrollments
    parent.hbx_enrollments.where(:irs_group_id => self.id)
  end

end```
assistant