如何打開編輯模式的Django

Question

views.py一種形式是

def when(request): 

    if request.method == 'POST': 

     reportform = ReportForm(data=request.POST) 

     if reportform.is_valid(): 
      report = reportform.save(commit=False) 
      report.save() 
      return redirect('/member/media/') 
    else: 
     reportform = ReportForm() 
    return render_to_response('incident/when.html',{ 
        'newreport_menu': True, 
        'form': reportform, 
        }, 
        context_instance=RequestContext(request)) 

我可以插入和保存數據後database.So保存數據，如果我再次打開該頁面輸入的數據應處於可編輯模式。最後輸入的數據應顯示在字段中。如何執行此操作。

感謝

Answer 1

使用instance參數的形式實例調用。

Answer 2

def when(request, instance_id=None): 

    report = None 
    if instance_id: 
     report = Report.objects.get(pk=instance_id) 

    if request.method == 'POST': 

     reportform = ReportForm(data=request.POST, instance=report) 

     if reportform.is_valid(): 
      report = reportform.save(commit=False) 
      report.save() 
      return redirect('/member/media/') 
    else: 
     reportform = ReportForm(instance=report) 
    return render_to_response('incident/when.html',{ 
       'newreport_menu': True, 
       'form': reportform, 
       }, 
       context_instance=RequestContext(request)) 

保留兩個網址，一個用於創建，另一個用於編輯，但它們都將使用相同的視圖。

url(r'^create/$', 'app.views.when', name='create_report'), 
url(r'^edit/(?P<instance_id>\d+)/$', 'app.views.when', name='edit_report')