enhance exercise_collection_statistics

app/models/exercise.rb

@@ -44,7 +44,7 @@ class Exercise < ApplicationRecord
 
   def average_percentage
     if average_score and maximum_score != 0.0 and submissions.exists?(cause: 'submit')
-      (average_score / maximum_score * 100).round
+      (average_score / maximum_score * 100).round(2)
     else
       0
     end

app/views/exercise_collections/statistics.html.slim

@@ -15,3 +15,27 @@ h1 = @exercise_collection
       .legend-entry
         div(class="box #{klass}")
         .box-label = label
+
+h4.mt-4 = t('activerecord.attributes.exercise_collections.exercises')
+.table-responsive#exercise-list
+  table.table
+    thead
+      tr
+        th = '#'
+        th = t('activerecord.attributes.exercise.title')
+        th = t('activerecord.attributes.exercise.number_of_users')
+        th = t('activerecord.attributes.exercise.distinct_final_submissions')
+        th = t('activerecord.attributes.exercise.finishing_rate')
+        th = t('activerecord.attributes.exercise.average_score_percentage')
+        th = t('shared.actions')
+    tbody
+      - @exercise_collection.items.sort_by{|item| item.position}.each do |exercise_collection_item|
+        - exercise = exercise_collection_item.exercise
+        tr
+          td = exercise_collection_item.position
+          td = link_to_if(policy(exercise).show?, exercise.title, exercise)
+          td = exercise.users.distinct.count
+          td = exercise.submissions.send(:final).distinct.count(:user_id)
+          td = finishers_percentage = exercise.users.distinct.count == 0 ? 0 : (100.0 / exercise.users.distinct.count * exercise.finishers.count).round(2)
+          td = exercise.average_percentage
+          td = link_to(t('shared.statistics'), statistics_exercise_path(exercise), 'data-turbolinks' => "false") if policy(exercise).statistics?