working on displaying data

app/models/category.rb

@@ -3,7 +3,28 @@ class Category < ApplicationRecord
   has_many :questions
   belongs_to :parent_category, class_name: 'Category', foreign_key: :parent_category_id
   has_many :child_categories, class_name: 'Category', foreign_key: :parent_category_id
+  has_many :school_categories
 
   validates :name, presence: true
 
+  scope :for_parent, -> (category=nil) { where(parent_category_id: category.try(:id)) }
+
+  def root_identifier
+    p = self
+    while p.parent_category.present?
+      p = p.parent_category
+    end
+    p.name.downcase.gsub(/\s/, '-')
+  end
+
+  def root_index
+    [
+      "teachers-and-the-teaching-environment",
+      "school-culture",
+      "resources",
+      "indicators-of-academic-learning",
+      "character-and-wellbeing-outcomes"
+    ].index(root_identifier)
+  end
+
 end

app/models/school.rb

@@ -3,6 +3,7 @@ class School < ApplicationRecord
   has_many :recipient_lists
   belongs_to :district
   has_many :recipients
+  has_many :school_categories
 
   validates :name, presence: true
 

app/models/school_category.rb

@@ -7,6 +7,11 @@ class SchoolCategory < ApplicationRecord
   validates_associated :category
 
   scope :for, -> (school, category) { where(school: school).where(category: category) }
+  scope :for_parent_category, -> (category=nil) { joins(:category).merge(Category.for_parent(category)) }
+
+  def answer_index_average
+    answer_index_total.to_f / response_count.to_f
+  end
 
   def aggregated_responses
     attempt_data = Attempt.
@@ -47,7 +52,11 @@ class SchoolCategory < ApplicationRecord
     return if ENV['BULK_PROCESS']
     update_attributes(chained_aggregated_responses)
     if category.parent_category.present?
-      SchoolCategory.for(school, category.parent_category).each { |sc| sc.sync_aggregated_responses }
+      parent_school_category = SchoolCategory.for(school, category.parent_category).first
+      if parent_school_category.nil?
+        parent_school_category = SchoolCategory.create(school: school, category: category.parent_category)
+      end
+      parent_school_category.sync_aggregated_responses
     end
   end
 end