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

app/presenters/dashboard/analyze/graph/students_by_gender.rb

@@ -0,0 +1,45 @@
+# frozen_string_literal: true
+
+module Analyze
+  module Graph
+    class StudentsByGender
+      include Analyze::Graph::Column::GenderColumn
+      attr_reader :genders
+
+      def initialize(genders:)
+        @genders = genders
+      end
+
+      def to_s
+        "Students by Gender"
+      end
+
+      def slug
+        "students-by-gender"
+      end
+
+      def columns
+        [].tap do |array|
+          genders.each do |gender|
+            array << column_for_gender_code(code: gender.qualtrics_code)
+          end
+          array.sort_by!(&:to_s)
+          array << Analyze::Graph::Column::AllStudent
+        end
+      end
+
+      private
+
+      def column_for_gender_code(code:)
+        CFR[code]
+      end
+
+      CFR = {
+        1 => Analyze::Graph::Column::GenderColumn::Female,
+        2 => Analyze::Graph::Column::GenderColumn::Male,
+        4 => Analyze::Graph::Column::GenderColumn::NonBinary,
+        99 => Analyze::Graph::Column::GenderColumn::Unknown
+      }.freeze
+    end
+  end
+end