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

app/models/dashboard/academic_year.rb

@@ -0,0 +1,40 @@
+module Dashboard
+  class AcademicYear < ApplicationRecord
+    def self.find_by_date(date)
+      year = parse_year_range(date:)
+      range = "#{year.start}-#{year.end.to_s[2, 3]}"
+      academic_years[range]
+    end
+
+    def formatted_range
+      years = range.split("-")
+      "#{years.first} – 20#{years.second}"
+    end
+
+    private
+
+    def self.parse_year_range(date:)
+      year = date.year
+      if date.month > 6
+        AcademicYearRange.new(year, year + 1)
+      else
+        AcademicYearRange.new(year - 1, year)
+      end
+    end
+
+    # This may cause problems if academic years get loaded from csv instead of the current method that requires a code change to the seeder script.  This is because a change in code will trigger a complete reload of the application whereas loading from csv does not.  This means if we change academic year to load from csv, the set of academic years will be stale when new years are added.
+    def self.academic_years
+      @@academic_years ||= AcademicYear.all.map { |academic_year| [academic_year.range, academic_year] }.to_h
+    end
+
+    # Needed to reset the academic years when testing with specs that create the same academic year in a before :each block
+    def self.reset_academic_years
+      @@academic_years = nil
+    end
+
+    private_class_method :academic_years
+    private_class_method :parse_year_range
+  end
+end
+
+AcademicYearRange = Struct.new(:start, :end)