Add temporary rake task to record duplicate school names and slugs in CSV format

lib/tasks/produce_csv.rake

@@ -0,0 +1,23 @@
+require 'csv'
+
+namespace :dupes do
+  task record_csv: :environment do
+    csv_string = CSV.generate do |csv|
+      csv << [ 'District Name', 'School Name', 'School Slug', 'Creation Time', 'Updated Time' ]
+
+      School.all.order(:district_id, :name, :created_at).each do |school|
+        schools = School.where name: school.name, district: school.district
+        if schools.length > 1
+          csv << [school.district.name, school.name, school.slug, school.created_at.to_date, school.updated_at.to_date]
+        end
+      end
+    end
+
+    puts csv_string
+  end
+end
+
+# produce CSV file that displays:
+    # | district_name | school_name    | school_slug | created_at | updated_at |
+    # | Dist1         | Jefferson High | jefferson-high | created_at | updated_at |
+    # | Dist1         | Jefferson High | lincoln-high | created_at | updated_at |