haystack/rest_api/schema.py

from typing import Dict, List, Optional, Union, Any
from pydantic import BaseModel, Field
from haystack.schema import Answer, Document, Label, Span
from pydantic import BaseConfig
from pydantic.dataclasses import dataclass as pydantic_dataclass

try:
    from typing import Literal
except ImportError:
    from typing_extensions import Literal #type: ignore

BaseConfig.arbitrary_types_allowed = True


class QueryRequest(BaseModel):
    query: str
    params: Optional[dict] = None


class FilterRequest(BaseModel):
    filters: Optional[Dict[str, Optional[Union[str, List[str]]]]] = None



@pydantic_dataclass
class AnswerSerialized(Answer):
    context: Optional[str] = None

@pydantic_dataclass
class DocumentSerialized(Document):
    content: str
    embedding: List[float]

@pydantic_dataclass
class LabelSerialized(Label):
    document: DocumentSerialized
    answer: Optional[AnswerSerialized] = None


class QueryResponse(BaseModel):
    query: str
    answers: List[AnswerSerialized]
    documents: Optional[List[DocumentSerialized]]