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from enum import Enum
class IndexType(Enum):
"""Enum of the currently supported index types."""
HASH = 1
JSON = 2
class IndexDefinition:
"""IndexDefinition is used to define a index definition for automatic
indexing on Hash or Json update."""
def __init__(
self,
prefix=[],
filter=None,
language_field=None,
language=None,
score_field=None,
score=1.0,
payload_field=None,
index_type=None,
):
self.args = []
self._appendIndexType(index_type)
self._appendPrefix(prefix)
self._appendFilter(filter)
self._appendLanguage(language_field, language)
self._appendScore(score_field, score)
self._appendPayload(payload_field)
def _appendIndexType(self, index_type):
"""Append `ON HASH` or `ON JSON` according to the enum."""
if index_type is IndexType.HASH:
self.args.extend(["ON", "HASH"])
elif index_type is IndexType.JSON:
self.args.extend(["ON", "JSON"])
elif index_type is not None:
raise RuntimeError(f"index_type must be one of {list(IndexType)}")
def _appendPrefix(self, prefix):
"""Append PREFIX."""
if len(prefix) > 0:
self.args.append("PREFIX")
self.args.append(len(prefix))
for p in prefix:
self.args.append(p)
def _appendFilter(self, filter):
"""Append FILTER."""
if filter is not None:
self.args.append("FILTER")
self.args.append(filter)
def _appendLanguage(self, language_field, language):
"""Append LANGUAGE_FIELD and LANGUAGE."""
if language_field is not None:
self.args.append("LANGUAGE_FIELD")
self.args.append(language_field)
if language is not None:
self.args.append("LANGUAGE")
self.args.append(language)
def _appendScore(self, score_field, score):
"""Append SCORE_FIELD and SCORE."""
if score_field is not None:
self.args.append("SCORE_FIELD")
self.args.append(score_field)
if score is not None:
self.args.append("SCORE")
self.args.append(score)
def _appendPayload(self, payload_field):
"""Append PAYLOAD_FIELD."""
if payload_field is not None:
self.args.append("PAYLOAD_FIELD")
self.args.append(payload_field)
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