allow_nan and catch list field

Author: tschaume

flask_mongorest/resources.py

@@ -472,7 +472,7 @@ def serialize_list_field(self, field_instance, field_name, field_value, **kwargs
         return [val for val in [
             self.get_field_value(elem, field_name, field_instance=field_instance.field, **kwargs)
             for elem in field_value
-        ] if val is not None]
+        ] if val is not None] if field_value else []
 
     def serialize_document_field(self, field_name, field_value, **kwargs):
         """If this field is a reference or an embedded document, either return

flask_mongorest/views.py

@@ -28,7 +28,7 @@
 register_mime('gz', ('application/gzip',))
 
 def render_json(**payload):
-    return json.dumps(payload, allow_nan=False, cls=MongoEncoder)
+    return json.dumps(payload, allow_nan=True, cls=MongoEncoder)
 
 def render_html(**payload):
     d = json.dumps(payload, cls=MongoEncoder, sort_keys=True, indent=4)
@@ -41,7 +41,7 @@ def render_gz(**payload):
         fmt = request.args.get('format')
         content_type = 'text/csv' if fmt == 'csv' else 'application/json'
         if fmt == 'json':
-            contents = json.dumps(payload['data'], allow_nan=False, cls=MongoEncoder)
+            contents = json.dumps(payload['data'], allow_nan=True, cls=MongoEncoder)
         elif fmt == 'csv':
             from pandas import DataFrame
             from cherrypicker import CherryPicker