Can someone provide scan API example of python elasticsearch helpers client?
res = elasticsearch.helpers.scan(....)
How can i get all results from elasticsearch with res object?
The documentation includes an example, although if I'm reading it right, helpers.scan
by default sets search_type=scan
, which was removed in ES 5.1. This causes the example code to fail with ES returning No search type for [scan]
. We can amend this with preserve_order=True
(I am however not sure about the performance implications here):
import elasticsearch
import elasticsearch.helpers
es = elasticsearch.Elasticsearch()
results = elasticsearch.helpers.scan(es,
index="test_index",
doc_type="my_document",
preserve_order=True,
query={"query": {"match_all": {}}},
)
for item in results:
print(item['_id'], item['_source']['name'])
This helper returns an object which you can iterate to obtain the actual results from the query.
item
is of form
{'_index': <str>, '_type': <str>, '_id': <str>, '_score': <float or None>, '_source': {'key': val}, 'sort': [<int>]}