Question

我有客户端，服务器，用户模型。在“客户详细信息视图”中，我想显示属于该公司的服务器和用户。我该如何过滤？

models.py

class Client(models.Model):
    name = models.CharField(max_length=50)
    def __str__(self):
        return self.name

class Server(models.Model):
    company = models.ForeignKey(Client, on_delete=models.CASCADE)
    name = models.CharField(max_length=50)
    def __str__(self):
        return self.name

class User(models.Model):
    company = models.ForeignKey(Client, verbose_name="Company", on_delete=models.CASCADE)
    first_name = models.CharField(max_length=50)
    last_name = models.CharField(max_length=50)
    def __str__(self):
        return self.first_name + ' ' + self.last_name

views.py

class clientdetails(LoginRequiredMixin, DetailView):
template_name = 'myapp/clientdetails.html'

def get_queryset(self):
    return Client.objects.all()

def get_context_data(self, **kwargs):
    context = super(clientdetails, self).get_context_data(**kwargs)
    context['servers'] = Server.objects.filter(** servers belonging to that client **)
    context['users'] = User.objects.filter(** servers belonging to that client **)
    return context

我该如何实现？

Answer 1

如果您希望这是一般用例，即从服务器检索到的所有对象都必须用于特定客户端。您可以使用limit-choices-to

class ClientDetails(LoginRequiredMixin, DetailView):
    template_name = 'myapp/clientdetails.html'
    model = Client

    def get_context_data(self, **kwargs):
        client = self.object
        context = super(ClientDetails, self).get_context_data(**kwargs)
        context['servers'] = Server.objects.filter(company=client)
        context['users'] = User.objects.filter(company=client)
        return context

或使用相关名称

 def get_context_data(self, **kwargs):
        context = super(ClientDetails, self).get_context_data(**kwargs)
        context['servers'] = self.object.server_set.all()
        context['users'] = self.object.user_set.all()
        return context

Answer 2

您根本不需要在视图中执行此操作；您可以按照模板中的关系进行操作。

{{ object.name }}
{% for server in object.server_set.all %}
    {{ server.name }}
{% endfor %}
{% for user in object.user_set.all %}
    {{ user.first_name }}
{% endfor %}

现在，您可以完全删除get_context_data方法。

Django-如何将经过过滤的查询集传递给Detailview

2 个答案: