如何在django-rest框架中从url获取pk

Question

我有两个应用Ticket和Comment，网址为：http://127.0.0.1:8000/api/tickets/<int:pk>/comments/<int:pk>/。

comment.views

class CommentAPIList(ListCreateAPIView):
queryset = Comment.objects.all()
serializer_class = CommentSerializer
permission_classes = (IsAuthenticatedOrReadOnly,)   
pagination_class = CommentAPIListPagination

我想在我的url中获得第一个int:pk来过滤我的查询集，比如：

queryset = Comment.objects.filter(ticket=MY_GOAL_PK)

注释.型号

class Comment(models.Model):
text = models.TextField()
ticket = models.ForeignKey(
Ticket,
on_delete=models.CASCADE,
)
user = models.ForeignKey(
settings.AUTH_USER_MODEL,
on_delete=models.CASCADE,
)
time_create = models.DateTimeField(auto_now_add=True)
time_update = models.DateTimeField(auto_now=True)
def __str__(self):
return self.text

票证。型号

class Ticket(models.Model):
title = models.CharField(max_length=150)
text = models.TextField()
status = models.ForeignKey(Status, on_delete=models.PROTECT, default=2)
user = models.ForeignKey(
settings.AUTH_USER_MODEL,
on_delete=models.CASCADE,
)
time_create = models.DateTimeField(auto_now_add=True)
time_update = models.DateTimeField(auto_now=True)
def __str__(self):
return self.title

我不知道我还能提供什么其他信息，但我可以根据你的要求提供。您可能有另一个解决方案来过滤我的Comment.objects。筛选应提供仅与此票证相关的评论

Answer 1

覆盖get_queryset(…)方法：

class CommentAPIList(ListCreateAPIView):
queryset = Comment.objects.all()
serializer_class = CommentSerializer
permission_classes = (IsAuthenticatedOrReadOnly,)
pagination_class = CommentAPIListPagination
defget_queryset(self, *args, **kwargs):
return (
super()
.get_queryset(*args, **kwargs)
.filter(ticket_id=self.kwargs['ticket_pk'])
)

对于路径，票证的主键应该有一个不同的名称，例如：

api/票证/<int：ticket_pk>评论/<int:pk>