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[1.x] Add fallback for constant_keyword (#1046) #1056

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Oct 28, 2020
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[1.x] Add fallback for constant_keyword (#1046) #1056

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1 change: 1 addition & 0 deletions CHANGELOG.next.md
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Original file line number Diff line number Diff line change
Expand Up @@ -30,6 +30,7 @@ Thanks, you're awesome :-) -->

* Added the `path` key when type is `alias`, to support the [alias field type](https://www.elastic.co/guide/en/elasticsearch/reference/current/alias.html). #877
* Added support for `scaled_float`'s mandatory parameter `scaling_factor`. #1042
* Added ability for --oss flag to fall back `constant_keyword` to `keyword`. #1046

#### Improvements

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6 changes: 4 additions & 2 deletions scripts/schema/oss.py
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Expand Up @@ -13,6 +13,7 @@
from schema import visitor

TYPE_FALLBACKS = {
'constant_keyword': 'keyword',
'wildcard': 'keyword',
'version': 'keyword'
}
Expand All @@ -25,5 +26,6 @@ def fallback(fields):

def perform_fallback(field):
"""Performs a best effort fallback of basic data types to equivalent OSS data types."""
if field['field_details']['type'] in TYPE_FALLBACKS.keys():
field['field_details']['type'] = TYPE_FALLBACKS[field['field_details']['type']]
fallback_type = TYPE_FALLBACKS.get(field['field_details']['type'])
if fallback_type:
field['field_details']['type'] = fallback_type
11 changes: 10 additions & 1 deletion scripts/tests/unit/test_schema_oss.py
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Expand Up @@ -14,6 +14,8 @@ class TestSchemaOss(unittest.TestCase):
def setUp(self):
self.maxDiff = None

# Fallbacks

def test_wildcard_fallback(self):
field = {'field_details': {'name': 'myfield', 'type': 'wildcard'}}
oss.perform_fallback(field)
Expand All @@ -24,12 +26,19 @@ def test_version_fallback(self):
oss.perform_fallback(field)
self.assertEqual('keyword', field['field_details']['type'])

def test_constant_keyword_fallback(self):
field = {'field_details': {'name': 'myfield', 'type': 'constant_keyword'}}
oss.perform_fallback(field)
self.assertEqual('keyword', field['field_details']['type'])

# Not falling back

def test_basic_without_fallback(self):
field = {'field_details': {'name': 'myfield', 'type': 'histogram'}}
oss.perform_fallback(field)
self.assertEqual('histogram', field['field_details']['type'])

def test_oss_no_fallback(self):
def test_oss_no_fallback_needed(self):
field = {'field_details': {'name': 'myfield', 'type': 'keyword'}}
oss.perform_fallback(field)
self.assertEqual('keyword', field['field_details']['type'])