86 lines
2.4 KiB
Python
86 lines
2.4 KiB
Python
"""
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Response handler for MongoDB query results.
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This module provides a wrapper class for MongoDB query results,
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adding convenience methods for accessing data and managing query state.
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"""
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from typing import Any, Dict, List, Optional, TypeVar, Generic, Union
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from pymongo.cursor import Cursor
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T = TypeVar("T")
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class MongoResponse(Generic[T]):
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"""
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Wrapper for MongoDB query results.
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Attributes:
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cursor: MongoDB cursor object
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first: Whether to return first result only
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data: Query results (lazy loaded)
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count: Total count of results
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"""
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def __init__(
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self,
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cursor: Optional[Cursor] = None,
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first: bool = False,
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status: bool = True,
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message: str = "",
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error: Optional[str] = None,
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data: Optional[Union[List[T], T]] = None,
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):
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self._cursor = cursor
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self._first = first
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self.status = status
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self.message = message
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self.error = error
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self._data: Optional[Union[List[T], T]] = data
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self._count: Optional[int] = None
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@property
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def data(self) -> Union[List[T], T, None]:
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"""
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Lazy load and return query results.
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Returns first item if first=True, otherwise returns all results.
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"""
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if self._data is None and self._cursor is not None:
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results = list(self._cursor)
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self._data = results[0] if self._first and results else results
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return self._data
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@property
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def count(self) -> int:
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"""Lazy load and return total count of results."""
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if self._count is None:
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if self._cursor is not None:
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self._count = self._cursor.count()
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else:
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self._count = len(self.all)
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return self._count
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@property
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def all(self) -> List[T]:
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"""Get all results as list."""
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return (
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self.data
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if isinstance(self.data, list)
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else [self.data] if self.data else []
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)
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@property
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def first(self) -> Optional[T]:
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"""Get first result only."""
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return self.data if self._first else (self.data[0] if self.data else None)
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def as_dict(self) -> Dict[str, Any]:
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"""Convert response to dictionary format."""
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return {
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"status": self.status,
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"message": self.message,
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"data": self.data,
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"count": self.count,
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"error": self.error,
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}
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