text: from rest_framework import generics
  
  from circuits.models import Provider, CircuitType, Circuit
  from circuits.filters import CircuitFilter
  
  from . import serializers
  
  
  class ProviderListView(generics.ListAPIView):
      """
      List all providers
      """
      queryset = Provider.objects.all()
      serializer_class = serializers.ProviderSerializer
  
  
  class ProviderDetailView(generics.RetrieveAPIView):
      """
      Retrieve a single provider
      """
      queryset = Provider.objects.all()
      serializer_class = serializers.ProviderSerializer
  
  
  class CircuitTypeListView(generics.ListAPIView):
      """
      List all circuit types
      """
      queryset = CircuitType.objects.all()
      serializer_class = serializers.CircuitTypeSerializer
  
  
  class CircuitTypeDetailView(generics.RetrieveAPIView):
      """
      Retrieve a single circuit type
      """
      queryset = CircuitType.objects.all()
      serializer_class = serializers.CircuitTypeSerializer
  
  
  class CircuitListView(generics.ListAPIView):
      """
      List circuits (filterable)
      """
      queryset = Circuit.objects.select_related('type', 'provider', 'site', 'interface__device')
      serializer_class = serializers.CircuitSerializer
      filter_class = CircuitFilter
  
  
  class CircuitDetailView(generics.RetrieveAPIView):
      """
      Retrieve a single circuit
      """
      queryset = Circuit.objects.select_related('type', 'provider', 'site', 'interface__device')
      serializer_class = serializers.CircuitSerializer
  