python - Django 表单搜索

Question

我正在 django 中制作一个搜索表单，在我看来，我正在努力处理该表单。

我的代码:

class SearchForm(forms.Form):
    name = forms.CharField(label="Name", max_length=64, required=False)
    ...
    <a few other fields>


def search(request):
    if request.method == 'POST':
        form = SearchForm(request.POST)
        if form.is_valid():
            name = form.cleaned_data['name']
            qdict = { 'name': name}
            q_objs = [Q(**{qdict[k]: form.cleaned_data[k]}) for k in qdict.keys() if form.cleaned_data.get(k, None)]
            search_results = Group.objects.select_related().filter(*q_objs)
            response = {'success' : search_results}
            return HttpResponse(simplejson.dumps(response, ensure_ascii=False), mimetype='application/javascript')
    else:
        form = SearchForm()
    return render_to_response("main/search.html", {'form': form},
      context_instance=RequestContext(request))

我收到此错误:无法将关键字 u'NAME' 解析到字段中。选项有:提交日期、id、名称、参数。

我意识到这个字段是unicode的，并尝试用str(...)或encode('ascii',...)转换它，但它仍然给我同样的错误。我是 django 新手，因此我们将不胜感激。

谢谢

Answer 1

要查找错误代码，请替换此代码:

name = form.cleaned_data['name']
qdict = { 'name': name}
q_objs = [Q(**{qdict[k]: form.cleaned_data[k]}) for k in qdict.keys() if form.cleaned_data.get(k, None)]
search_results = Group.objects.select_related().filter(*q_objs)

通过这个:

q=None
for k,v in form.cleaned_data.items():
  if q:
    q &= Q( k = v )
  else:
    q = Q( k = v )
search_results = Group.objects.select_related().filter( q )

但是，要真正控制查询，您需要逐个条件地编写:

qs = []

name = form.cleaned_data['name']
if name:
  q_name = Q( name__contains = name )
  qs.append(q_name)

fromDate = form.cleaned_data['fromDate']
if fromDate:
  q_from = Q( date__gte = fromDate )
  qs.append(q_from)

toDate = form.cleaned_data['toDate']
if toDate:
  q_toDate = Q( date__gte = toDate )
  qs.append(q_toDate)

q=None
for x in qs:
  if q:
    q &= x
  else:
    q = x

search_results = Group.objects.select_related().filter(q)