Python 要仅在Django中显示最新的便笺条目吗

我有另一个Django表单，它存储注释，并且自动存储用户、客户端和日期时间。这次我想做的是创建一些注释表单，允许您为特定客户添加注释，每次添加注释时，它都会在

client\u details.html

模板中显示最新结果，并且只显示

client\u details.html

最新结果。因此，每次添加新便笺时，它都会不断替换现有便笺。我怎样才能做到这一点

forms.py

class NoteForm(forms.ModelForm):
    class Meta:
        model = models.Note
        exclude = ('client','user','datetime')

@login_required
def get_client(request, client_id = 0):
    client = None
    try:
        client = models.Client.objects.get(pk = client_id)
        notes = client.note_set.all()
        comments = client.comment_set.order_by('-datetime')
    except:
        pass
    return render_to_response('client_details.html', {'client':client, 'notes':notes, 'comments':comments}, context_instance = RequestContext(request))

@login_required
    def add_notes(request, client_id = 0):
        client = None
        contact = None
        try:
            client = models.Client.objects.get(pk = client_id)
        except:
            return HttpResponseNotFound()

        if request.method == 'POST':
            form = forms.NoteForm(request.POST)
            if form.is_valid():
                note = form.save(commit=False)
                note.user = request.user
                note.client = client
                note.save(True)
                request.user.message_set.create(message = "Note is successfully added.")
                return HttpResponse("<script language=\"javascript\" type=\"text/javascript\">window.opener.location = window.opener.location; window.close();</script>")
        else:
            form = forms.NoteForm()
        return render_to_response('note_form.html', {'form':form, 'client':client}, context_instance = RequestContext(request))

视图.py

class NoteForm(forms.ModelForm):
    class Meta:
        model = models.Note
        exclude = ('client','user','datetime')

@login_required
def get_client(request, client_id = 0):
    client = None
    try:
        client = models.Client.objects.get(pk = client_id)
        notes = client.note_set.all()
        comments = client.comment_set.order_by('-datetime')
    except:
        pass
    return render_to_response('client_details.html', {'client':client, 'notes':notes, 'comments':comments}, context_instance = RequestContext(request))

@login_required
    def add_notes(request, client_id = 0):
        client = None
        contact = None
        try:
            client = models.Client.objects.get(pk = client_id)
        except:
            return HttpResponseNotFound()

        if request.method == 'POST':
            form = forms.NoteForm(request.POST)
            if form.is_valid():
                note = form.save(commit=False)
                note.user = request.user
                note.client = client
                note.save(True)
                request.user.message_set.create(message = "Note is successfully added.")
                return HttpResponse("<script language=\"javascript\" type=\"text/javascript\">window.opener.location = window.opener.location; window.close();</script>")
        else:
            form = forms.NoteForm()
        return render_to_response('note_form.html', {'form':form, 'client':client}, context_instance = RequestContext(request))

@需要登录\u
def get_客户端（请求，客户端id=0）：
客户端=无
尝试：
client=models.client.objects.get（pk=client\u id）
notes=client.note\u set.all（）
comments=client.comment\u set.order\u by（'-datetime'）
除：
通过
返回render_to_response（'client_details.html'，{'client'：client，'notes'，'comments'：comments}，context_实例=RequestContext（请求））
@需要登录
def添加注释（请求，客户端id=0）：
客户端=无
联系人=无
尝试：
client=models.client.objects.get（pk=client\u id）
除：
返回HttpResponseNotFound（）
如果request.method==“POST”：
form=forms.NoteForm（request.POST）
如果form.is_有效（）：
注意=form.save（commit=False）
note.user=request.user
note.client=client
注意：保存（True）
request.user.message\u set.create（message=“Note已成功添加。”）
返回HttpResponse（“window.opener.location=window.opener.location；window.close（）；”）
其他：
form=forms.NoteForm（）
返回render_to_response（'note_form.html'，{'form'：form，'client'：client}，context_instance=RequestContext（request））

添加到您的视图中：

try:
    last_note = client.note_set.latest("datetime")
except DoesNotExist:
    last_note = None