39 lines
1.2 KiB
Python
39 lines
1.2 KiB
Python
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"""Общая пагинация и режим fetch_all."""
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from __future__ import annotations
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from fastapi import HTTPException
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DEFAULT_FETCH_ALL_MAX = 50_000
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def slice_page(
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items: list,
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*,
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offset: int,
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limit: int,
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fetch_all: bool = False,
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max_all: int = DEFAULT_FETCH_ALL_MAX,
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) -> tuple[list, int, int, int]:
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"""
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Возвращает (page, total, response_limit, response_offset).
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При fetch_all — весь список (с проверкой max_all).
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"""
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total = len(items)
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if fetch_all:
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if total > max_all:
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raise HTTPException(
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status_code=400,
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detail={
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"code": "too_many_rows",
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"message": (
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f"Слишком много строк ({total}); максимум {max_all}. "
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"Сузьте фильтры или используйте пагинацию."
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),
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"total": total,
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"max": max_all,
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},
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)
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return items, total, total, 0
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return items[offset : offset + limit], total, limit, offset
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