moving to a more industry standard grading scale of 0,1,2,3 from out …

…0 to 4, and eliminating the middle choice (#206)

db/migrate/20200911180507_change_to_zero_to_three_grading.rb

@@ -0,0 +1,17 @@
+class ChangeToZeroToThreeGrading < ActiveRecord::Migration
+  def change
+
+    scale_with_labels = {"0":"Poor","1":"Fair","2":"Good","3":"Perfect"}
+
+    scorers_to_update = ['nDCG@5', 'DCG@5', 'CG@5']
+
+    scorers_to_update.each do |scorer_name|
+      scorer = Scorer.where(name: scorer_name).first
+      unless scorer.nil?
+        scorer.scale = (0..3).to_a
+        scorer.scale_with_labels = scale_with_labels
+      end
+
+    end
+  end
+end

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20200522215022) do
+ActiveRecord::Schema.define(version: 20200911180507) do
 
   create_table "annotations", force: :cascade do |t|
     t.text     "message",    limit: 65535

db/seeds.rb

@@ -7,8 +7,8 @@
 #   Mayor.create(name: 'Emanuel', city: cities.first)
 
 Scorer.where(name: 'nDCG@5').first_or_create(
-  scale:                  (0..4).to_a,
-  scale_with_labels:      {"0":"Irrelevant","1":"Poor","2":"Fair","3":"Good","4":"Perfect"},
+  scale:                  (0..3).to_a,
+  scale_with_labels:      {"0":"Poor","1":"Fair","2":"Good","3":"Perfect"},
   show_scale_labels:      true,
   code:                   File.readlines('./db/scorers/[email protected]','\n').join('\n'),
   name:                   'nDCG@5',
@@ -18,17 +18,17 @@
 )
 
 Scorer.where(name: 'DCG@5').first_or_create(
-  scale:              (0..4).to_a,
-  scale_with_labels:  {"0":"Irrelevant","1":"Poor","2":"Fair","3":"Good","4":"Perfect"},
+  scale:              (0..3).to_a,
+  scale_with_labels:  {"0":"Poor","1":"Fair","2":"Good","3":"Perfect"},
   show_scale_labels:  true,
   code:               File.readlines('./db/scorers/[email protected]','\n').join('\n'),
   name:               'DCG@5',
   communal:           true
 )
 
 Scorer.where(name: 'CG@5').first_or_create(
-  scale:              (0..4).to_a,
-  scale_with_labels:  {"0":"Irrelevant","1":"Poor","2":"Fair","3":"Good","4":"Perfect"},
+  scale:              (0..3).to_a,
+  scale_with_labels:  {"0":"Poor","1":"Fair","2":"Good","3":"Perfect"},
   show_scale_labels:  true,
   code:               File.readlines('./db/scorers/[email protected]','\n').join('\n'),
   name:               'CG@5',