其实这个东西跟restframework没有卵关系，顺便写在这里

Django REST framework的各种技巧【目录索引】

导入导出在cms中是一个非常常用的功能，思考做成通用的东西，最终选择django-import-export，虽然这玩意儿最初是想放在admin中用的，虽然用起来很繁琐，但是可以做成通用的东西，而且用起来比较像rest的serializer。

django-import-export==0.4.2 文档

需要看的源码 cd 你的virtualenv/local/lib/python2.7/site-packages/import_export

resources.py instance_loaders.py

先看用法

通过view可以看到，代码在这里是很干净的，跟一个正常的restframework的api没有什么区别。

class SchoolExportView(ExportMixin, GenericAPIView):serializer_class = SchoolSerializerpermission_classes = (IsAuthenticated, ModulePermission)queryset = School.objects.filter(is_active=True).order_by('-id')resource_class = SchoolResourcefilter_backends = (filters.DjangoFilterBackend, filters.SearchFilter)filter_class = SchoolFiltersearch_fields = ('name', 'contact')module_perms = ['school.school']class SchoolImportView(ImportMixin, GenericAPIView):serializer_class = SchoolSerializerpermission_classes = (IsAuthenticated, ModulePermission)queryset = School.objects.filter(is_active=True).order_by('-id')resource_class = SchoolResourcemodule_perms = ['school.school']

Mixin

class ExportMixin(object):@GET('filename', type='string', default='download.xls')@GET('format', type='string', default='xls', validators='in: xls,xlsx')@GET('empty', type='bool', default=False)def get(self, request, format, filename, empty):queryset = Noneif not empty:queryset = self.filter_queryset(self.get_queryset())resourse = self.resource_class()export_data = resourse.export(queryset, empty)return attachment_response(getattr(export_data, format), filename=filename)class ImportMixin(object):@POST('file', validators='required')def post(self, request, file):import_file = request.FILES['file']resource = self.resource_class()extra_data = {} if not hasattr(self, 'get_resoucre_extra_data') else self.get_resoucre_extra_data()resource.set_extra_data(extra_data)dataset = resource.get_dataset(import_file)result = resource.import_data(dataset, use_transactions=True, raise_errors=True)return Response()

重点是实现Resource, 先说export

export非常简单，因此先说export,先看demo(仅仅写export)

# -*- coding: utf-8 -*-
from __future__ import absolute_import
from import_export import resources
from school.models import School
class SchoolResource(resources.ModelResource):def dehydrate_category(self, school):if school.category == School.MIDDLE_SCHOOL:return u'中学'elif school.category == School.COLLEGE:return u'高校'return ''def get_export_headers(self):return [u'分类', u'省份', u'城市', u'学校', u'地址', u'联系人',u'职务', u'联系电话', u'邮箱']class Meta:model = Schoolfields = ('category', 'cit