json: exclude None in output, and sort keys

These are both size/performance enhancements. Not including 'None'
values will reduce document sizes on-disk and over network, particularly
for intermediate objects. Sorting by key should improve compression
ratios across multiple documents, both on-disk (gzip) and in
elasticsearch itself:

  https://www.elastic.co/guide/en/elasticsearch/reference/current/tune-for-disk-usage.html#_put_fields_in_the_same_order_in_documents

1 files changed, 1 insertions, 1 deletions

diff --git a/fatcat_scholar/sim_pipeline.py b/fatcat_scholar/sim_pipeline.py
index f99471f..95e5cad 100644
--- a/fatcat_scholar/sim_pipeline.py
+++ b/fatcat_scholar/sim_pipeline.py
@@ -149,7 +149,7 @@ class SimPipeline:
                         issue_item_metadata=full_issue["issue_item_metadata"],
                     ),
                 )
-                print(bundle.json())
+                print(bundle.json(exclude_none=True, sort_keys=True))
                 count += 1
                 if limit is not None and count >= limit:
                     break