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Add explanation field if meta is enabled #49

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Add explanation field if meta is enabled #49

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a5f8eb2
Add explanation field if meta is enable
david-gero-cp May 8, 2018
adfc7f7
update documentation
david-gero-cp May 8, 2018
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2 changes: 1 addition & 1 deletion docs/EXAMPLES.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -275,7 +275,7 @@ Very long queries can be read from file

meta-fields
-----------
Selecting meta-fields: _id, _index, _score, _type
Selecting meta-fields: _id, _index, _score, _type, _explanation. If the selected meta-field is not available than we use `NaN` as a default.

.. code-block:: bash

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5 changes: 3 additions & 2 deletions es2csv.py
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Expand Up @@ -12,7 +12,8 @@
CONNECTION_TIMEOUT = 120
TIMES_TO_TRY = 3
RETRY_DELAY = 60
META_FIELDS = [u'_id', u'_index', u'_score', u'_type']
META_FIELDS = [u'_id', u'_index', u'_score', u'_type', u'_explanation']
NaN = "NaN"


# Retry decorator for functions with exceptions
Expand Down Expand Up @@ -198,7 +199,7 @@ def is_dict(arg):

with codecs.open(self.tmp_file, mode='a', encoding='utf-8') as tmp_file:
for hit in hit_list:
out = {field: hit[field] for field in META_FIELDS} if self.opts.meta_fields else {}
out = {field: hit.get(field, NaN) for field in META_FIELDS} if self.opts.meta_fields else {}
if '_source' in hit and len(hit['_source']) > 0:
to_keyvalue_pairs(hit['_source'])
tmp_file.write('{}\n'.format(json.dumps(out)))
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