Add submission volume metric

app/helpers/statistics_helper.rb

@@ -55,7 +55,13 @@ module StatisticsHelper
         {
             key: 'average_submissions',
             name: t('statistics.entries.exercises.average_number_of_submissions'),
-            data: Submission.count / Exercise.count
+            data: (Submission.count.to_f / Exercise.count).round(2)
+        },
+        {
+            key: 'submissions_per_minute',
+            name: t('statistics.entries.exercises.submissions_per_minute'),
+            data: (Submission.where('created_at >= ?', DateTime.now - 1.hours).count.to_f / 60).round(2),
+            unit: '/min'
         },
         {
             key: 'execution_environments',

config/locales/de.yml

@@ -744,6 +744,7 @@ de:
     entries:
       exercises:
         average_number_of_submissions: "Durchschnittliche Zahl von Abgaben"
+        submissions_per_minute: "Aktuelle Abgabenhäufigkeit (1h)"
       request_for_comments:
         percent_solved: "Beantwortete Anfragen"
         percent_unsolved: "Unbeantwortete Anfragen"

config/locales/en.yml

@@ -744,6 +744,7 @@ en:
     entries:
       exercises:
         average_number_of_submissions: "Average Number of Submissions"
+        submissions_per_minute: "Current Submission Volume (1h)"
       request_for_comments:
         percent_solved: "Solved Requests"
         percent_unsolved: "Unsolved Requests"