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71 lines
3.4 KiB
71 lines
3.4 KiB
class SurveyItemResponse < ActiveRecord::Base
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TEACHER_RESPONSE_THRESHOLD = 17
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STUDENT_RESPONSE_THRESHOLD = 196
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belongs_to :academic_year
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belongs_to :school
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belongs_to :survey_item
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def self.score_for_subcategory(subcategory:, school:, academic_year:)
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measures = subcategory.measures.select { |measure| sufficient_data?(measure: measure, school: school, academic_year: academic_year) }
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SurveyItemResponse.for_measures(measures)
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.where(academic_year: academic_year, school: school)
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.average(:likert_score)
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end
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def self.score_for_measure(measure:, school:, academic_year:)
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meets_teacher_threshold = teacher_sufficient_data? measure: measure, school: school, academic_year: academic_year
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meets_student_threshold = student_sufficient_data? measure: measure, school: school, academic_year: academic_year
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meets_all_thresholds = meets_teacher_threshold && meets_student_threshold
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survey_item_responses = if meets_all_thresholds
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SurveyItemResponse.for_measure(measure)
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elsif meets_teacher_threshold
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SurveyItemResponse.teacher_responses_for_measure(measure)
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elsif meets_student_threshold
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SurveyItemResponse.student_responses_for_measure(measure)
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end
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unless survey_item_responses.nil?
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score_for_measure = survey_item_responses.average(:likert_score)
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end
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Score.new(score_for_measure, meets_teacher_threshold, meets_student_threshold)
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end
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def self.sufficient_data?(measure:, school:, academic_year:)
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meets_teacher_threshold = teacher_sufficient_data? measure: measure, school: school, academic_year: academic_year
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meets_student_threshold = student_sufficient_data? measure: measure, school: school, academic_year: academic_year
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meets_teacher_threshold || meets_student_threshold
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end
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private
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scope :for_measure, ->(measure) { joins(:survey_item).where('survey_items.measure_id': measure.id) }
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scope :for_measures, ->(measures) { joins(:survey_item).where('survey_items.measure_id': measures.map(&:id)) }
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scope :teacher_responses_for_measure, ->(measure) { for_measure(measure).where("survey_items.survey_item_id LIKE 't-%'") }
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scope :student_responses_for_measure, ->(measure) { for_measure(measure).where("survey_items.survey_item_id LIKE 's-%'") }
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def self.student_sufficient_data?(measure:, school:, academic_year:)
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if measure.includes_student_survey_items?
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student_survey_item_responses = SurveyItemResponse.student_responses_for_measure(measure).where(academic_year: academic_year, school: school)
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average_number_of_survey_item_responses = student_survey_item_responses.count / measure.student_survey_items.count
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meets_student_threshold = average_number_of_survey_item_responses >= STUDENT_RESPONSE_THRESHOLD
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end
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!!meets_student_threshold
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end
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def self.teacher_sufficient_data?(measure:, school:, academic_year:)
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if measure.includes_teacher_survey_items?
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teacher_survey_item_responses = SurveyItemResponse.teacher_responses_for_measure(measure).where(academic_year: academic_year, school: school)
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average_number_of_survey_item_responses = teacher_survey_item_responses.count / measure.teacher_survey_items.count
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meets_teacher_threshold = average_number_of_survey_item_responses >= TEACHER_RESPONSE_THRESHOLD
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end
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!!meets_teacher_threshold
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end
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end
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