diff --git a/db/migrate/20171120153705_add_timestamps_to_user_exercise_feedbacks.rb b/db/migrate/20171120153705_add_timestamps_to_user_exercise_feedbacks.rb
new file mode 100644
index 00000000..4529d527
--- /dev/null
+++ b/db/migrate/20171120153705_add_timestamps_to_user_exercise_feedbacks.rb
@@ -0,0 +1,6 @@
+class AddTimestampsToUserExerciseFeedbacks < ActiveRecord::Migration
+  def up
+    add_column :user_exercise_feedbacks, :created_at, :datetime, null: false, default: Time.now
+    add_column :user_exercise_feedbacks, :updated_at, :datetime, null: false, default: Time.now
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index 818030b1..2c0c1314 100644
--- a/db/schema.rb
+++ b/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: 20171002131135) do
+ActiveRecord::Schema.define(version: 20171120153705) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -104,6 +104,7 @@ ActiveRecord::Schema.define(version: 20171002131135) do
     t.string   "name"
     t.datetime "created_at"
     t.datetime "updated_at"
+    t.boolean  "use_anomaly_detection", default: false
   end
 
   create_table "exercise_collections_exercises", id: false, force: :cascade do |t|
@@ -123,14 +124,14 @@ ActiveRecord::Schema.define(version: 20171002131135) do
   create_table "exercises", force: :cascade do |t|
     t.text     "description"
     t.integer  "execution_environment_id"
-    t.string   "title",                     limit: 255
+    t.string   "title",                    limit: 255
     t.datetime "created_at"
     t.datetime "updated_at"
     t.integer  "user_id"
     t.text     "instructions"
     t.boolean  "public"
-    t.string   "user_type",                 limit: 255
-    t.string   "token",                     limit: 255
+    t.string   "user_type",                limit: 255
+    t.string   "token",                    limit: 255
     t.boolean  "hide_file_tree"
     t.boolean  "allow_file_creation"
     t.boolean  "allow_auto_completion",                default: false
@@ -347,13 +348,15 @@ ActiveRecord::Schema.define(version: 20171002131135) do
   end
 
   create_table "user_exercise_feedbacks", force: :cascade do |t|
-    t.integer "exercise_id",             null: false
-    t.integer "user_id",                 null: false
-    t.string  "user_type",               null: false
-    t.integer "difficulty"
-    t.integer "working_time_seconds"
-    t.string  "feedback_text"
-    t.integer "user_estimated_worktime"
+    t.integer  "exercise_id",                                             null: false
+    t.integer  "user_id",                                                 null: false
+    t.string   "user_type",                                               null: false
+    t.integer  "difficulty"
+    t.integer  "working_time_seconds"
+    t.string   "feedback_text"
+    t.integer  "user_estimated_worktime"
+    t.datetime "created_at",              default: '2017-11-20 18:20:25', null: false
+    t.datetime "updated_at",              default: '2017-11-20 18:20:25', null: false
   end
 
   create_table "user_exercise_interventions", force: :cascade do |t|