Implement invoice model and admin API

gnuviechadmin/invoices/views.py

@@ -0,0 +1,28 @@
+from django.contrib.auth import get_user_model
+from rest_framework import generics
+
+from invoices.models import Invoice
+from invoices.serializers import InvoiceSerializer
+
+
+# Create your views here.
+class ListInvoiceAPIView(generics.ListCreateAPIView):
+    """
+    API endpoint that allows invoice to be viewed or edited.
+
+    """
+
+    queryset = Invoice.objects.all().order_by("-invoice_date", "customer__username")
+    serializer_class = InvoiceSerializer
+
+
+class InvoiceAPIView(generics.RetrieveUpdateAPIView):
+    """
+    API endpoint for retrieving and updating invoices.
+
+    """
+
+    queryset = Invoice.objects.all()
+    serializer_class = InvoiceSerializer
+    lookup_field = "invoice_number"
+    lookup_url_kwarg = "invoice_number"