Add soft delete API for signups

webapp/views.py

@@ -106,7 +106,7 @@ class SignupFormViewSet(ModelViewSet):
 
 
 class SignupViewSet(ModelViewSet):
-    queryset = Signup.objects.all()
+    queryset = Signup.objects.filter(deleted=False)
     serializer_class = SignupSerializer
     permission_classes = [SignupPermission]
 
@@ -156,6 +156,15 @@ class SignupViewSet(ModelViewSet):
         else:
             return JsonResponse(status=404, data={"error": f"SignupForm {id} not found"})
 
+    def destroy(self, request, pk=None, *args, **kwargs):
+        try:
+            signup = self.get_object()
+            signup.deleted = True
+            signup.save()
+            return JsonResponse(status=200, data={"message": "OK"})
+        except ObjectDoesNotExist:
+            return JsonResponse(status=404, data={"error": f"Signup {pk} not found"})
+
 
 class SavedQuestionsViewSet(ModelViewSet):
     queryset = TemplateQuestion.objects.all()