Django export CSV

Question

Je veux exporter la base de données sous forme de fichier csv, Je les erreurs suivantes: qui disent indice de tuple hors de portée, je ne sais pas pourquoi

Request Method:  GET 
Request URL: http://www.article/export_excel/ 
Django Version:  1.6.2 
Exception Type:  IndexError 
Exception Value: tuple index out of range 

Exception Location:  /var/www/article/views.py in export_excel, line 191 
Python Executable: /usr/bin/python 
Python Version:  2.6.6 
Python Path:  

['/usr/lib/python2.6/site-packages/pip-1.5.2-py2.6.egg', 
'/usr/lib64/python26.zip', 
'/usr/lib64/python2.6', 
'/usr/lib64/python2.6/plat-linux2', 
'/usr/lib64/python2.6/lib-tk', 
'/usr/lib64/python2.6/lib-old', 
'/usr/lib64/python2.6/lib-dynload', 
'/usr/lib64/python2.6/site-packages', 
'/usr/lib/python2.6/site-packages', 
'/usr/lib/python2.6/site-packages/setuptools-0.6c11-py2.6.egg-info', 
Server time: Thu, 22 May 2014 14:45:02 +0900 
Traceback Switch to copy-and-paste view 
    /usr/lib/python2.6/site-packages/django/core/handlers/base.py in get_response 
          response = wrapped_callback(request, *callback_args, **callback_kwargs) 
     ... 
    ▶ Local vars 
    /var/www/article/views.py in export_excel 
       day = att[2].day 
     ... 
    ▶ Local vars 

Ceci est mon views.py :

from datetime import datetime, time, date, timedelta 
class workLog(object): 
    def __init__(self, name, day, attTime, leaveTime): 
     self.name = name 
     self.day = day 
     self.attTime = attTime 
     self.leaveTime = leaveTime 

def export_excel(request): 
    from staffprofile.models import Myattendance,Myleavework 
    response = HttpResponse(mimetype='application/vnd.ms-excel; charset="Shift_JIS"') 
    response['Content-Disposition'] = 'attachment; filename=file.csv' 
    writer = csv.writer(response) 
    titles = ["No","name","day","attendance_time", "leave_time" 
    writer.writerow(titles) 
    obj_all = attendance.objects.filter(user_id = 3).values_list('user', 'contact_date', 'contact_time').order_by("-contact_date") 
    lea = leavework.objects.filter(user_id = 3).values_list('contact_time').order_by('-contact_date') 
    S = Staff.objects.all() 
    row = [workLog('name', i, None, None) for i in range(32)] 


    for att in obj_all.filter(user_id = 3).values_list('contact_date'): 
     day = att[2] 
     log = row[day] 

     if log.attTime is None: 
      log.attTime = att[2] 
     elif log.attTime < att[2]: 
      log.attTime = att[2] 

    for leav in lea: 
     day = leav[2].day 
     log = row[day] 
     if log.leaveTime is None: 
      log.leaveTime = leav[2] 
     elif log.leaveTime < leav[2]: 
      log.leaveTime = leav[2] 

    for log in row: 
     if log.attTime is not None: 
      if log.leaveTime is not None: 
       row.append((log.attTime, log.leaveTime)) 
      else: 
       row.append(None) 
     else: 
      if log.leaveTime is not None: 
       row(None) 

     writer.writerow(row) 
    return response 

Answer 1

https://docs.djangoproject.com/en/dev/ref/models/querysets/#values-list

Déclaration obj_all.filter(user_id = 3).values_list('contact_date') retourner un tableau de dimension n * 1. La longueur de attr est 1.