fix: I broke the feature where the site would automatically navigate the user to the latest year that had sufficient data when I made response rates calculate on each page load instead of being precalculated and stored in the database. Instead of a database lookup for response rates that meet the sufficiency threshold, I caculate the latest year when a user chooses a school from the welcome page.

app/controllers/home_controller.rb

@@ -43,12 +43,15 @@ class HomeController < ApplicationController
   end
 
   def year
-    latest_response_rate = ResponseRate.where(school:)
-                                       .where('meets_student_threshold = ? or meets_teacher_threshold = ?', true, true)
-                                       .joins('inner join academic_years a on response_rates.academic_year_id=a.id')
-                                       .order('a.range DESC').first
-    academic_year = latest_response_rate.academic_year.range if latest_response_rate.present?
+    return nil unless school.present?
 
-    academic_year || AcademicYear.order('range DESC').first.range
+    academic_year = AcademicYear.all.order(range: :DESC).find do |ay|
+      Subcategory.all.any? do |subcategory|
+        rate = subcategory.response_rate(school:, academic_year: ay)
+        rate.meets_student_threshold || rate.meets_teacher_threshold
+      end
+    end
+
+    academic_year.range || AcademicYear.order("range DESC").first.range
   end
 end