Module: StudySubjectOperationalEvents

Included in:
StudySubject
Defined in:
app/models/study_subject_operational_events.rb

Overview

Simply extracted some code to clean up model. I’d like to do this to all of the really big classes but let’s see how this goes first.

Class Method Summary collapse

Class Method Details

.included(base) ⇒ Object 



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# File 'app/models/study_subject_operational_events.rb', line 7

def self.included(base)
# Must delay the calls to these ActiveRecord methods
# or it will raise many "undefined method"s.
base.class_eval do

  has_many :operational_events, :through => :enrollments

  after_create :add_new_subject_operational_event
  after_save   :add_subject_died_operational_event

  #  All subjects are to have a CCLS project enrollment, so create after create.
  #  All subjects are to have this operational event, so create after create.
  #  I suspect that this'll be attached to the CCLS project enrollment.
  def add_new_subject_operational_event
    ccls_enrollment = enrollments.find_or_create_by_project_id(Project['ccls'].id)
    OperationalEvent.create!(
      :enrollment => ccls_enrollment,
      :operational_event_type => OperationalEventType['newSubject'],
      :occurred_on            => Date.today
    )
  end

  #  Add this if the vital status changes to deceased.
  #  I suspect that this'll be attached to the CCLS project enrollment.
  def add_subject_died_operational_event
    if( ( vital_status_id == VitalStatus['deceased'].id ) && 
        ( vital_status_id_was != VitalStatus['deceased'].id ) )
      ccls_enrollment = enrollments.find_or_create_by_project_id(Project['ccls'].id)
      OperationalEvent.create!(
        :enrollment => ccls_enrollment,
        :operational_event_type => OperationalEventType['subjectDied'],
        :occurred_on            => Date.today
      )
    end
  end

# operational_events.occurred_on where operational_event_type_id = 26 and enrollment_id is for any open project (where projects.ended_on is null) for study_subject_id

  def screener_complete_date_for_open_project
    OperationalEvent.find(:first,
      :joins => [
        'LEFT JOIN enrollments ON operational_events.enrollment_id = enrollments.id',
        'LEFT JOIN projects ON enrollments.project_id = projects.id'
      ],
      :conditions => [
        "study_subject_id = :subject_id AND " <<
        "operational_event_type_id = :screener_complete AND " <<
        'projects.ended_on IS NULL', 
        {
          :subject_id => self.id,
          :screener_complete => OperationalEventType['screener_complete'].id
        }
      ]
    ).try(:occurred_on)
  end

end # class_eval
end