152 lines
4.5 KiB
Python
152 lines
4.5 KiB
Python
from typing import List, Optional
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from redis.utils import decode_field_value, str_if_bytes
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from ._util import to_string
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from .document import Document
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class Result:
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"""
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Represents the result of a search query, and has an array of Document
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objects
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"""
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def __init__(
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self,
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res,
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hascontent,
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duration=0,
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has_payload=False,
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with_scores=False,
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field_encodings: Optional[dict] = None,
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warnings: Optional[List[str]] = None,
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):
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"""
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- duration: the execution time of the query
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- has_payload: whether the query has payloads
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- with_scores: whether the query has scores
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- field_encodings: a dictionary of field encodings if any is provided
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- warnings: list of server warnings (from RESP3 responses)
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"""
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self.total = res[0]
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self.duration = duration
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self.docs = []
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self.warnings = warnings or []
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step = 1
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if hascontent:
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step = step + 1
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if has_payload:
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step = step + 1
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if with_scores:
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step = step + 1
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offset = 2 if with_scores else 1
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for i in range(1, len(res), step):
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id = to_string(res[i])
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payload = to_string(res[i + offset]) if has_payload else None
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# fields_offset = 2 if has_payload else 1
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fields_offset = offset + 1 if has_payload else offset
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score = float(res[i + 1]) if with_scores else None
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fields = {}
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if hascontent and res[i + fields_offset] is not None:
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keys = map(to_string, res[i + fields_offset][::2])
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values = res[i + fields_offset][1::2]
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for key, value in zip(keys, values):
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if field_encodings is None or key not in field_encodings:
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fields[key] = to_string(value)
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continue
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encoding = field_encodings[key]
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# If the encoding is None, we don't need to decode the value
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if encoding is None:
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fields[key] = value
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else:
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fields[key] = to_string(value, encoding=encoding)
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try:
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del fields["id"]
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except KeyError:
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pass
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try:
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fields["json"] = fields["$"]
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del fields["$"]
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except KeyError:
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pass
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doc = (
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Document(id, score=score, payload=payload, **fields)
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if with_scores
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else Document(id, payload=payload, **fields)
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)
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self.docs.append(doc)
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@classmethod
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def from_resp3(
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cls,
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res: dict,
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duration: float = 0,
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with_scores: bool = False,
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field_encodings: Optional[dict] = None,
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) -> "Result":
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"""Construct a Result from a RESP3 dict response.
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RESP3 format:
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{
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"total_results": N,
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"results": [
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{"id": "doc1", "score": 1.5, "extra_attributes": {"f1": "v1"}},
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...
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],
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"warning": [...]
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}
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"""
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instance = cls.__new__(cls)
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if res is None:
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res = {}
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instance.total = res.get("total_results", 0)
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instance.duration = duration
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instance.docs = []
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instance.warnings = [str_if_bytes(w) for w in res.get("warning", [])]
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for result_item in res.get("results", []):
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doc_id = str_if_bytes(result_item.get("id", ""))
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score = None
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if with_scores and "score" in result_item:
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score = float(result_item["score"])
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fields = {}
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extra_attrs = result_item.get("extra_attributes") or {}
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for key, value in extra_attrs.items():
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key = str_if_bytes(key)
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fields[key] = decode_field_value(value, key, field_encodings)
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try:
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del fields["id"]
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except KeyError:
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pass
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try:
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fields["json"] = fields["$"]
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del fields["$"]
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except KeyError:
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pass
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doc = (
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Document(doc_id, score=score, payload=None, **fields)
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if with_scores
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else Document(doc_id, payload=None, **fields)
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)
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instance.docs.append(doc)
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return instance
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def __repr__(self) -> str:
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return f"Result{{{self.total} total, docs: {self.docs}}}"
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