Elasticsearch 5 has maybe more reason to allow the creation of mapping

[kootenpv]

Maybe it would be possible to ingest a mapping into elasticsearch before writing items? E.g.

ELASTICSEARCH_MAPPING = { ... some json ...}

or

ELASTICSEARCH_MAPPING = "/file/to/mapping.json"

It'd be a nice flow to have it be included at this stage.

[jayzeng]

@kootenpv yeah, I will consider to implement this. https://github.com/knockrentals/scrapy-elasticsearch/issues/51 also asks for the same feature.