old_contents: from django.contrib import admin
  from music.models import Music
  from player.models import Room
  from django.contrib.admin.helpers import ActionForm
  from django import forms
  import copy
  
  from music.serializers import MusicSerializer
  
  class UpdateActionForm(ActionForm):
      rooms = []
      for room in Room.objects.all():
          new_tuple = (room.name,room.name)
          rooms.append(new_tuple)
      nrroom = forms.ChoiceField(required="false",label=" Target Room for duplication",choices=rooms)
  
  class MusicAdmin(admin.ModelAdmin):
      list_display = ('name', 'count', 'music_id', 'source', 'duration', 'last_play', 'thumbnail', 'room', 'timer_start','one_shot')
      actions = ('add_music','duplicate_music')
  
      action_form = UpdateActionForm
      def has_add_permission(self, request):
          return False
  
      def add_music(self, request, queryset):
          for music in queryset:
              # Hack to transform music into dict
              music.room.add_music(**MusicSerializer(music).data)
          return
  
      def duplicate_music(self,request,queryset):
          targetRoom = Room.objects.get(name=request.POST['nrroom'])
          if targetRoom :
              for music in queryset :
                  if targetRoom.name != music.room.name:
                      if not Music.objects.filter(music_id=music.music_id,room=targetRoom).exists() :
                          new_entry = music
                          new_entry.room = targetRoom
                          new_entry.pk = None
                          new_entry.save()
              return
  
  
  
  
  admin.site.register(Music, MusicAdmin)
  
new_contents: from django.contrib import admin
  from music.models import Music
  from player.models import Room
  from django.contrib.admin.helpers import ActionForm
  from django import forms
  
  from music.serializers import MusicSerializer
  
  
  class UpdateActionForm(ActionForm):
      def __init__(self, form, fieldsets, prepopulated_fields, readonly_fields=None, model_admin=None):
          self.rooms = []
          for room in Room.objects.all():
              new_tuple = (room.name, room.name)
              self.rooms.append(new_tuple)
          self.nrroom = forms.ChoiceField(required="false", label="Target Room for duplication", choices=self.rooms)
          super().__init__(self, form, fieldsets, prepopulated_fields, readonly_fields=readonly_fields, model_admin=model_admin)
  
  
  class MusicAdmin(admin.ModelAdmin):
      list_display = ('name', 'count', 'music_id', 'source', 'duration', 'last_play', 'thumbnail', 'room', 'timer_start', 'one_shot')
      actions = ('add_music', 'duplicate_music')
  
      action_form = UpdateActionForm
  
      def has_add_permission(self, request):
          return False
  
      def add_music(self, request, queryset):
          for music in queryset:
              # Hack to transform music into dict
              music.room.add_music(**MusicSerializer(music).data)
          return
  
      def duplicate_music(self, request, queryset):
          targetRoom = Room.objects.get(name=request.POST['nrroom'])
          for music in queryset:
              if targetRoom.name != music.room.name:
                  if not Music.objects.filter(music_id=music.music_id, room=targetRoom).exists():
                      new_entry = music
                      new_entry.room = targetRoom
                      new_entry.pk = None
                      new_entry.save()
  
  
  admin.site.register(Music, MusicAdmin)
  
subject: fix failing test suite