Add basic support for "eligible purchases" for receiving batch API

tailbone/api/batch/core.py

@@ -117,9 +117,12 @@ class APIBatchView(APIBatchMixin, APIMasterView):
         Here we'll invoke the handler for actual batch creation, instead of
         typical logic used for simple records.
         """
+        user = self.request.user
         kwargs = dict(data)
-        kwargs['user'] = self.request.user
+        kwargs['user'] = user
         batch = self.handler.make_batch(self.Session(), **kwargs)
+        if self.handler.should_populate(batch):
+            self.handler.do_populate(batch, user)
         return batch
 
     def update_object(self, batch, data):