dirty commit: can't get references to work correctly between any tables

app/controllers/dashboard/home_controller.rb

@@ -0,0 +1,59 @@
+# frozen_string_literal: true
+
+module Dashboard
+  class HomeController < ApplicationController
+    helper HeaderHelper
+
+    def index
+      @districts = districts
+      @district =  district
+
+      @schools = schools
+      @school = school
+
+      @year = year
+      @categories = Category.sorted.map { |category| CategoryPresenter.new(category:) }
+    end
+
+    private
+
+    def districts
+      District.all.order(:name).map do |district|
+        [district.name, district.id]
+      end
+    end
+
+    def district
+      return District.find(params[:district]) if params[:district].present?
+
+      District.first
+    end
+
+    def schools
+      if district.present?
+        district.dashboard_schools.order(:name).map do |school|
+          [school.name, school.id]
+        end
+      else
+        []
+      end
+    end
+
+    def school
+      School.find(params[:school]) if params[:school].present?
+    end
+
+    def year
+      return nil unless school.present?
+
+      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
+end