Django-admin導出到表格

class AdminReport(admin.ModelAdmin):
    actions = ["saveexecl"]                 # 自定義的action（導出到excel表格）
    list_display = ("id",'offer','day_time', 'idfa', 'submit_result_text', 'callback_result_text')    # 顯示的列
    search_fields = ('day_time','callback_result_text')      # 能夠搜索的字段
    date_hierarchy = 'day_time'      # 按照日期顯示
    list_filter = ('offer',)         # 過濾條件
    list_per_page = 500              # 每頁顯示500條，太多了可能會出現服務器崩掉的狀況
    
    def saveexecl(self,request,queryset):
        Begin = xlwt.Workbook()
        sheet = Begin.add_sheet("response")
        cols = 0
        for query in queryset:
            # you need write colms                     # 好像有個方法能夠一次性寫入全部列，記不清了，只能用這種簡單的方法去實現
            sheet.write(cols,1,str(query.idfa))        # 寫入第一列
            sheet.write(cols,2,str(query.day_time))    # 寫入第二列
            sheet.write(cols,3,str(query.keyword))     # 寫入第三列
            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 = "導出Excel"            # 按鈕顯示名字


admin.site.register(Report, AdminReport)     # 註冊到admin