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43 lines
1.3 KiB
Python
43 lines
1.3 KiB
Python
"""Logic for converting internal query language to a valid Chroma query."""
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from typing import Dict, Tuple, Union
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from langchain.chains.query_constructor.ir import (
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Comparator,
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Comparison,
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Operation,
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Operator,
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StructuredQuery,
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Visitor,
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)
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class ChromaTranslator(Visitor):
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"""Logic for converting internal query language elements to valid filters."""
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allowed_operators = [Operator.AND, Operator.OR]
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"""Subset of allowed logical operators."""
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def _format_func(self, func: Union[Operator, Comparator]) -> str:
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self._validate_func(func)
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return f"${func.value}"
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def visit_operation(self, operation: Operation) -> Dict:
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args = [arg.accept(self) for arg in operation.arguments]
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return {self._format_func(operation.operator): args}
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def visit_comparison(self, comparison: Comparison) -> Dict:
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return {
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comparison.attribute: {
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self._format_func(comparison.comparator): comparison.value
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}
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}
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def visit_structured_query(
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self, structured_query: StructuredQuery
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) -> Tuple[str, dict]:
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if structured_query.filter is None:
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kwargs = {}
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else:
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kwargs = {"filter": structured_query.filter.accept(self)}
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return structured_query.query, kwargs
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