old_contents: from core.models import Application as Image
  
  from api import permissions
  from api.v2.serializers.details import ImageSerializer
  from api.v2.views.base import AuthOptionalViewSet
  from api.v2.views.mixins import MultipleFieldLookup
  
  
  class ImageViewSet(MultipleFieldLookup, AuthOptionalViewSet):
  
      """
      API endpoint that allows images to be viewed or edited.
      """
      lookup_fields = ("id", "uuid")
  
      http_method_names = ['get', 'put', 'patch', 'head', 'options', 'trace']
  
      filter_fields = ('created_by__username', 'tags__name', 'projects__id')
  
      permission_classes = (permissions.InMaintenance,
                            permissions.ApiAuthOptional,
                            permissions.CanEditOrReadOnly,
                            permissions.ApplicationMemberOrReadOnly)
  
      serializer_class = ImageSerializer
  
      search_fields = ('id', 'name', 'versions__change_log', 'tags__name',
                       'tags__description', 'created_by__username', 'versions__machines__instance_source__provider__location')
  
      def get_queryset(self):
          request_user = self.request.user
          return Image.current_apps(request_user)
  
new_contents: from core.models import Application as Image
  
  from api import permissions
  from api.v2.serializers.details import ImageSerializer
  from api.v2.views.base import AuthOptionalViewSet
  from api.v2.views.mixins import MultipleFieldLookup
  
  
  class ImageViewSet(MultipleFieldLookup, AuthOptionalViewSet):
  
      """
      API endpoint that allows images to be viewed or edited.
      """
      lookup_fields = ("id", "uuid")
  
      http_method_names = ['get', 'put', 'patch', 'head', 'options', 'trace']
  
      filter_fields = ('created_by__username', 'tags__name', 'projects__id')
  
      permission_classes = (permissions.InMaintenance,
                            permissions.ApiAuthOptional,
                            permissions.CanEditOrReadOnly,
                            permissions.ApplicationMemberOrReadOnly)
  
      serializer_class = ImageSerializer
  
      search_fields = ('id', 'name', 'versions__change_log', 'tags__name',
                       'tags__description', 'created_by__username',
                       'versions__machines__instance_source__identifier',
                       'versions__machines__instance_source__provider__location')
  
      def get_queryset(self):
          request_user = self.request.user
          return Image.current_apps(request_user)
  
subject: Add 'Machine Identifier' for easy support lookups in Troposphere