mirror of
https://github.com/QingdaoU/OnlineJudge.git
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85 lines
2.3 KiB
Python
85 lines
2.3 KiB
Python
# coding=utf-8
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from django.core.paginator import Paginator
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from rest_framework.response import Response
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def error_response(error_reason):
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return Response(data={"code": 1, "data": error_reason})
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def serializer_invalid_response(serializer):
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return error_response(serializer.errors)
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def success_response(data):
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return Response(data={"code": 0, "data": data})
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def paginate(request, query_set, object_serializer):
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"""
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用于分页的函数
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如果 url 里面不含有paging=true，那么将返回全部数据。类似
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[
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{
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"username": "1111111",
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"password": "123456"
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}
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]
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如果 url 中有 paging=true 的参数，
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然后还需要读取其余的两个参数，page=[int]，需要的页码，p
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age_size=[int]，一页的数据条数
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参数错误的时候，返回{"code": 1, "data": u"参数错误"}
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返回的数据格式
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{
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"code": 0,
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"data": {
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"previous_page": null,
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"results": [
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{
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"username": "1111111",
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"password": "123456"
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}
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],
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"next_page": 2
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}
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}
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:param query_set 数据库查询结果
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:param object_serializer: 序列化单个object的serializer
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:return response
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"""
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need_paginate = request.GET.get("paging", None)
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# 如果请求的参数里面没有paging=true的话 就返回全部数据
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if need_paginate != "true":
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return success_response(data=object_serializer(query_set, many=True).data)
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page_size = request.GET.get("page_size", None)
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if not page_size:
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return error_response(u"参数错误")
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try:
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page_size = int(page_size)
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except Exception:
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return error_response(u"参数错误")
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paginator = Paginator(query_set, page_size)
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page = request.GET.get("page", None)
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try:
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current_page = paginator.page(page)
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except Exception:
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return error_response(u"参数错误")
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data = {"results": object_serializer(current_page, many=True).data, "previous_page": None, "next_page": None}
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try:
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data["previous_page"] = current_page.previous_page_number()
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except Exception:
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pass
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try:
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data["next_page"] = current_page.next_page_number()
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except Exception:
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pass
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return success_response(data) |