```ruby
class DueItem < ActiveRecord::Base
  include MyplaceonlineActiveRecordIdentityConcern
  
  belongs_to :calendar
end
```

Add due items to full text search results
user
```ruby
class DueItem < ActiveRecord::Base
  include MyplaceonlineActiveRecordIdentityConcern
  
  belongs_to :calendar
  
  def final_search_result
    self.calendar
  end
end
```
assistant