Django窗体和筛选

所以我有这个工作选择窗体，应该允许用户：Django窗体和筛选

1）选择一个过滤器一组单选按钮。这让用户可以选择他想用哪种方法过滤列表。（这将使用'filterBy'查询字符串执行GET 2）允许用户通过来自作为＃1结果的组合框的对象来过滤列表。这种形式执行与设置为filterBy对象

这里的PK的“过滤器”一个POST是代码我有：

selectForm = JobSelectForm() 
filterByForm = FilterByForm() 
filterForm = FilterForm() 

if request.method == 'POST': 
    #this works just fine 
    if 'job' in request.POST: 
     return HttpResponseRedirect("/portal/jobs/%s/"%(request.POST['job'])) 

    if 'filter' in request.POST: 
     filterForm = FilterForm(initial = {'filter': request.POST['filter']}) 

     ###### The Problem is below here 
     ###### I cant get the 'filterBy' query string 
     ###### because this is a POST and not a GET 
     ###### Is there a better way to write this filtering? 

     if request.GET['filterby'] == 'G': 
      obj = Group.objects.get(pk=request.POST['filter']) 
      selectForm.fields['job'].queryset = Job.objects.filter(group=obj).order_by('name') 
     elif request.GET['filterby'] == 'H': 
      obj = Host.objects.get(pk=request.POST['filter']) 
      selectForm.fields['job'].queryset = Job.objects.filter(host=obj).order_by('name') 
     elif request.GET['filterby'] == 'L': 
      obj = Location.objects.get(pk=request.POST['filter']) 
      selectForm.fields['job'].queryset = Job.objects.filter(colo=obj).order_by('name') 

###### All of this works fine too 
elif request.method == 'GET': 
    if request.GET.has_key('filterby'): 
     if request.GET['filterby']: 
      filterByForm = FilterByForm(initial = {'filterby': request.GET['filterby']}) 
      if request.GET['filterby'] == 'G': 
       filterForm.fields['filter'].queryset = Group.objects.all().order_by('name') 
      elif request.GET['filterby'] == 'H': 
       filterForm.fields['filter'].queryset = Host.objects.all().order_by('name') 
      elif request.GET['filterby'] == 'L': 
       filterForm.fields['filter'].queryset = Location.objects.all().order_by('name')

来源

2011-05-20 nnachefski

为什么分开GET和POST？为什么不使用GET并使其更简单？ – 2011-05-20 14:56:47

你应该把你的问题的代码形式的overrided __init__方法。

来源

2011-05-20 13:48:58 DrTyrsa

使用request.REQUEST（参见：Django Request and Response Objects）。它拥有request.POST和request.GET的值。

此外，在Python中使用字典时，应始终验证您尝试访问的密钥是否存在。这可以通过以下两种方式之一进行：

1）在词典

if request.GET.has_key('filterby') and request.GET['filterby'] == 'G': 
    obj = Group.objects.get(pk=request.POST['filter']) 
    selectForm.fields['job'].queryset = Job.objects.filter(group=obj).order_by('name')

2）使用字典的get方法明确地测试关键

if request.GET.get('filterby') == 'G': 
    obj = Group.objects.get(pk=request.POST['filter']) 
    selectForm.fields['job'].queryset = Job.objects.filter(group=obj).order_by('name')

随着dict.get你也可以通过一个默认值：

if request.GET.get('filterby', valueIfKeyDoesntExist) == 'G': 
    obj = Group.objects.get(pk=request.POST['filter']) 
    selectForm.fields['job'].queryset = Job.objects.filter(group=obj).order_by('name')

来源

2011-05-20 14:43:11

Django窗体和筛选

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