Attributes are not included in document payload when updating if names don't match.

This is a common scenario, i.e. your model has latitude and longitude attributes where your elasticsearch mapping has a location field.

def as_indexed_json(opts={})
 {location: {latitude: self.latitude, longitude: self.longitude}}
end

In this case, if latitude or longitude change the location field won't be included in the payload (since names don't match).

Relevant code:

https://github.com/elastic/elasticsearch-rails/blob/master/elasticsearch-model/lib/elasticsearch/model/indexing.rb#L391

attributes = if respond_to?(:as_indexed_json)
 self.as_indexed_json.select { |k,v| changed_attributes.keys.map(&:to_s).include? k.to_s }
else
 changed_attributes
end