mirror of
https://github.com/fastapi-practices/fastapi-best-architecture.git
synced 2026-09-21 13:12:24 +00:00
62 lines
1.9 KiB
Python
62 lines
1.9 KiB
Python
#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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from __future__ import annotations
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import math
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from typing import TypeVar, Generic, Sequence, Dict, Union
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from fastapi import Query
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from fastapi_pagination.bases import AbstractPage, AbstractParams, RawParams
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from fastapi_pagination.links.bases import create_links
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from pydantic import BaseModel
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T = TypeVar('T')
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"""
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重写分页库：fastapi-pagination
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使用方法：example link: https://github.com/uriyyo/fastapi-pagination/tree/main/examples
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"""
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class Params(BaseModel, AbstractParams):
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page: int = Query(1, ge=1, description='Page number')
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size: int = Query(20, gt=0, le=100, description='Page size') # 默认 20 条记录
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def to_raw_params(self) -> RawParams:
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return RawParams(
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limit=self.size,
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offset=self.size * (self.page - 1),
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)
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class Page(AbstractPage[T], Generic[T]):
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data: Sequence[T] # 数据
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total: int # 总数据数
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page: int # 第n页
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size: int # 每页数量
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total_pages: int # 总页数
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links: Dict[str, Union[str, None]] # 跳转链接
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__params_type__ = Params # 使用自定义的Params
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@classmethod
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def create(
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cls,
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data: Sequence[T],
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total: int,
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params: Params,
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) -> Page[T]:
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page = params.page
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size = params.size
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total_pages = math.ceil(total / params.size)
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links = create_links(
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**{
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'first': {'page': 1, 'size': f'{size}'},
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'last': {'page': f'{math.ceil(total / params.size)}', 'size': f'{size}'} if total > 0 else None,
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'next': {'page': f'{page + 1}', 'size': f'{size}'} if (page + 1) <= total_pages else None,
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'prev': {'page': f'{page - 1}', 'size': f'{size}'} if (page - 1) >= 1 else None,
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}
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).dict()
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return cls(data=data, total=total, page=params.page, size=params.size, total_pages=total_pages, links=links)
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