Now creating periodic task via button

app/views/tasks/_form.html.haml

@@ -23,8 +23,9 @@
   = f.input :required_users
   = f.association :workgroup
   = f.input :due_date, as: :date_picker
-  = f.input :periodic, as: :boolean
   = f.input :done
   .form-actions
-    = f.submit class: 'btn'
+    = f.submit class: 'btn btn-primary'
+    - unless @task.id
+      = f.submit 'Wöchentliche Aufgabe erstellen', name: 'periodic', class: 'btn'
     = link_to t('ui.or_cancel'), :back

app/views/tasks/show.haml

@@ -29,6 +29,6 @@
   = link_to t('ui.edit'), edit_task_path(@task), class: 'btn'
   = link_to t('ui.delete'), task_path(@task), :method => :delete, :confirm => "Die Aufgabe wirklich löschen?",
     class: 'btn btn-danger'
-  - if @task.periodic
+  - if @task.periodic?
     = link_to t('ui.delete_all'), periodic_task_group_path(@task.periodic_task_group), :method => :delete, 
       :confirm => "Alle Aufgaben dieser wöchentlichen Aufgabe wirklich löschen?", class: 'btn btn-danger'