109 lines
3.5 KiB
Python
109 lines
3.5 KiB
Python
import logging
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from rest_framework import serializers
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from rest_framework.generics import ListAPIView
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from rest_framework.pagination import PageNumberPagination,_positive_int,InvalidPage
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from rest_framework.response import Response
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from rest_framework.views import exception_handler
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from django.core.paginator import InvalidPage
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from rest_framework.exceptions import NotFound
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error_logger = logging.getLogger('error')
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info_logger = logging.getLogger('info')
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class CommonPagination(PageNumberPagination):
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"""
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分页设置
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"""
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page_size = 10
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page_size_query_param = 'limit'
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def paginate_queryset(self, queryset, request, view=None):
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"""
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重写该方法,确保post请求也可分页
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"""
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page_size = self.get_page_size(request)
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if not page_size:
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return None
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paginator = self.django_paginator_class(queryset, page_size)
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if self.page_query_param in request.query_params:
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page_number = request.query_params.get(self.page_query_param)
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elif self.page_query_param in request.data:
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page_number = request.data.get(self.page_query_param)
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else:
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page_number = 1
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if page_number in self.last_page_strings:
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page_number = paginator.num_pages
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try:
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self.page = paginator.page(page_number)
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except InvalidPage as exc:
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msg = self.invalid_page_message.format(
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page_number=page_number, message=str(exc)
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)
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raise NotFound(msg)
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if paginator.num_pages > 1 and self.template is not None:
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# The browsable API should display pagination controls.
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self.display_page_controls = True
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self.request = request
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return list(self.page)
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def get_page_size(self, request):
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if self.page_size_query_param:
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try:
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if self.page_size_query_param in request.query_params:
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page_size = request.query_params.get(self.page_size_query_param)
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else:
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page_size = request.data.get(self.page_size_query_param)
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return _positive_int(
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page_size,
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strict=True,
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cutoff=self.max_page_size
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)
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except (KeyError, ValueError):
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pass
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return self.page_size
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class TreeSerializer(serializers.Serializer):
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id = serializers.IntegerField()
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label = serializers.CharField(max_length=20, source='name')
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pid = serializers.PrimaryKeyRelatedField(read_only=True)
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class TreeAPIView(ListAPIView):
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"""
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自定义树结构View
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"""
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serializer_class = TreeSerializer
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def list(self, request, *args, **kwargs):
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queryset = self.filter_queryset(self.get_queryset())
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page = self.paginate_queryset(queryset)
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serializer = self.get_serializer(queryset, many=True)
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tree_dict = {}
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tree_data = []
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try:
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for item in serializer.data:
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tree_dict[item['id']] = item
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for i in tree_dict:
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if tree_dict[i]['pid']:
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pid = tree_dict[i]['pid']
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parent = tree_dict[pid]
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parent.setdefault('children', []).append(tree_dict[i])
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else:
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tree_data.append(tree_dict[i])
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results = tree_data
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except KeyError:
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results = serializer.data
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if page is not None:
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return self.get_paginated_response(results)
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return Response(results)
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