Django import export实现数据库导入导出方式

INSTALLED_APPS = (
 'django.contrib.admin',
 'django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.messages',
 'django.contrib.staticfiles',
 'customer',
 'publisher',
 'import_export',
)

class Author(models.Model):
 name = models.CharField(max_length=100)

 def __unicode__(self):
  return self.name


class Category(models.Model):
 name = models.CharField(max_length=100)

 def __unicode__(self):
  return self.name


class Book(models.Model):
 name = models.CharField('Book name', max_length=100)
 author = models.ForeignKey(Author, blank=True, null=True)
 author_email = models.EmailField('Author email', max_length=75, blank=True)
 imported = models.BooleanField(default=False)
 published = models.DateField('Published', blank=True, null=True)
 price = models.DecimalField(max_digits=10, decimal_places=2, null=True, blank=True)
 categories = models.ManyToManyField(Category, blank=True)

 def __unicode__(self):
  return self.name

from import_export import resources
from core.models import Book
from import_export.admin import ImportExportModelAdmin


class BookResource(resources.ModelResource):

 class Meta:
  model = Book
  export_order = ('id', 'name', 'author', 'author_email', 'imported', 'click', 'published', 'price', 'categories')

@admin.register(Book)
class BookAdmin(ImportExportModelAdmin):
 list_display = ('name', 'author', 'author_email', 'imported', 'published', 'price', 'categories')
 search_fields = ('name', 'author','published')
 date_hierarchy = 'date' 
 resource_class = BookResource

import xlwt
#导出Excel
from django.http import StreamingHttpResponse
class AdminReport(admin.ModelAdmin):
 actions = ["saveexecl"]     # 自定义的action（导出到excel表格）
 list_display = ("id",'offer','day_time', 'idfa', 'submit_result_text', 'callback_result_text') # 显示的列
 search_fields = ('day_time','callback_result_text')  # 可以搜索的字段
 date_hierarchy = 'day_time'  # 按照日期显示
 list_filter = ('offer',)   # 过滤条件
 list_per_page = 500    # 每页显示500条，太多了可能会出现服务器崩掉的情况
 
 def saveexecl(self,request,queryset):
  Begin = xlwt.Workbook()
  sheet = Begin.add_sheet("response")
  cols = 0
  for query in queryset:
   # you need write colms      # 好像有个方法可以一次性写入所有列，记不清了，只能用这种简单的方法去实现
   sheet.write(cols,1,str(query.idfa))  # 写入第一列
   sheet.write(cols,2,str(query.day_time)) # 写入第二列
   sheet.write(cols,3,str(query.keyword))  # 写入第三列
   cols += 1
  Begin.save("%s" %(filename))
  def file_iterator(filename,chuck_size=512):
   with open(filename,"rb") as f:
    while True:
     c = f.read(chuck_size)
     if c:
      yield c
     else:
      break
  response = StreamingHttpResponse(file_iterator(filename))
  response['Content-Type'] = 'application/octet-stream'
  response['Content-Disposition'] = 'attachment;filename="{}"'.format("result.xls")
  return response
 saveexecl.short_description = "导出Excel"   # 按钮显示名字


admin.site.register(Report, AdminReport)  # 注册到admin