Code Cleanup: Usage of Polymorphic User instead of ExternalUser and InternalUser

Renamed requestor_user_id -> user_id
Index of request_for_comments now returns the n (5?) newest requests per user. Solved via sliding windows in postgres, code added to model.
Added route to /my_request_for_comments/ that shows all requests for the current user.
Changed view from ERB to slim

config/locales/de.yml

@@ -73,6 +73,11 @@ de:
         password: Passwort
         password_confirmation: Passwort-Bestätigung
         role: Rolle
+      request_for_comments:
+        exercise: Aufgabe
+        execution_environment: Sprache
+        username: Benutzername
+        requested_at: Angefragezeitpunkt
       submission:
         cause: Anlass
         code: Code
@@ -176,7 +181,7 @@ de:
       run: Ausführen
       run_failure: Ihr Code konnte nicht auf der Plattform ausgeführt werden.
       run_success: Ihr Code wurde auf der Plattform ausgeführt.
-      requestComments: Rückmeldung erbitten
+      requestComments: Kommentare erbitten
       save: Speichern
       score: Bewerten
       start_over: Von vorne anfangen
@@ -272,6 +277,9 @@ de:
       reset_password:
         body: 'Bitte besuchen Sie %{link}, sofern Sie Ihr Passwort zurücksetzen wollen.'
         subject: Anweisungen zum Zurücksetzen Ihres Passworts
+  request_for_comments:
+    index:
+      get_my_comment_requests: Meine Kommentaranfragen
   sessions:
     create:
       failure: Fehlerhafte E-Mail oder Passwort.

config/locales/en.yml

@@ -73,6 +73,11 @@ en:
         password: Password
         password_confirmation: Passwort Confirmation
         role: Role
+      request_for_comments:
+        exercise: Exercise
+        execution_environment: Language
+        username: Username
+        requested_at: Request Date
       submission:
         cause: Cause
         code: Code
@@ -272,6 +277,9 @@ en:
       reset_password:
         body: 'Please visit %{link} if you want to reset your password.'
         subject: Password reset instructions
+  request_for_comments:
+    index:
+      get_my_comment_requests: My Requests for Comments
   sessions:
     create:
       failure: Invalid email or password.

config/routes.rb

@@ -2,6 +2,7 @@ FILENAME_REGEXP = /[\w\.]+/ unless Kernel.const_defined?(:FILENAME_REGEXP)
 
 Rails.application.routes.draw do
   resources :request_for_comments
+    get '/my_request_for_comments', as: 'my_request_for_comments', to: 'request_for_comments#get_my_comment_requests'
   resources :comments, except: [:destroy] do
     collection do
       delete :destroy