我在Django REST Framework网站上的教程中找不到任何关于如何实现这一点的信息,我也没有设法在文档中找到它,尽管我确定它在某个地方。
我希望issues
作为父资源,pages
作为子资源,这样/issues/1/pages
就可以返回issue_id
为1的所有页面。
使用基于泛型类的视图有没有实现这一点的好方法?
这是我到目前为止所掌握的。
restAPI/urls.py:
from django.conf.urls import patterns, url
from rest_framework.urlpatterns import format_suffix_patterns
from restAPI import views
urlpatterns = patterns('',
url(r'^issues/$', views.IssueList.as_view()),
url(r'^issues/(?P<pk>[0-9]+)/$', views.IssueDetail.as_view()),
url(r'^issues/(?P<issue_id>[0-9]+)/pages/$', views.PageList.as_view()),
url(r'^pages/(?P<pk>[0-9]+)/$', views.PageDetail.as_view()),
)
urlpatterns = format_suffix_patterns(urlpatterns)
restAPI/models.py:
from django.db import models
class Issue(models.Model):
created = models.DateTimeField(auto_now_add=True)
revision = models.IntegerField(default = 1)
issue_date = models.DateTimeField(auto_now_add=True)
issue_image_url = models.CharField(max_length=100)
class Page(models.Model):
created = models.DateTimeField(auto_now_add=True)
page_number = models.IntegerField()
standard_page_url = models.CharField(max_length=100, default='')
large_page_url = models.CharField(max_length=100, default='')
thumbnail_url = models.CharField(max_length=100, default='')
issue = models.ForeignKey(Issue, related_name="pages")
class Meta:
ordering = ('page_number',)
restAPI/serializers.py:
from rest_framework import serializers
from restAPI.models import Page, Issue
class IssueSerializer(serializers.ModelSerializer):
class Meta:
model = Issue
fields = ('id', 'created', 'revision', 'issue_date', 'issue_image_url')
class PageSerializer(serializers.ModelSerializer):
class Meta:
model = Page
fields = ('id', 'created', 'page_number', 'standard_page_url', 'large_page_url', 'thumbnail_url')
restAPI/views.py:
from restAPI.models import Page, Issue
from restAPI.serializers import PageSerializer, IssueSerializer
from rest_framework import mixins
from rest_framework import generics
class IssueList(mixins.ListModelMixin,
mixins.CreateModelMixin,
generics.GenericAPIView):
queryset = Issue.objects.all()
serializer_class = IssueSerializer
def get(self, request, *args, **kwargs):
return self.list(request, *args, **kwargs)
def post(self, request, *args, **kwargs):
return self.create(request, *args, **kwargs)
class IssueDetail(mixins.RetrieveModelMixin,
mixins.UpdateModelMixin,
mixins.DestroyModelMixin,
generics.GenericAPIView):
queryset = Issue.objects.all()
serializer_class = IssueSerializer
def get(self, request, *args, **kwargs):
return self.retrieve(request, *args, **kwargs)
def put(self, request, *args, **kwargs):
return self.update(request, *args, **kwargs)
def delete(self, request, *args, **kwargs):
return self.destroy(request, *args, **kwargs)
class PageList(mixins.ListModelMixin,
mixins.CreateModelMixin,
generics.GenericAPIView):
queryset = Page.objects.all()
serializer_class = PageSerializer
def get(self, request, *args, **kwargs):
print kwargs
return self.list(request, *args, **kwargs)
def post(self, request, *args, **kwargs):
return self.create(request, *args, **kwargs)
class PageDetail(mixins.RetrieveModelMixin,
mixins.UpdateModelMixin,
mixins.DestroyModelMixin,
generics.GenericAPIView):
queryset = Page.objects.all()
serializer_class = PageSerializer
def get(self, request, *args, **kwargs):
return self.retrieve(request, *args, **kwargs)
def put(self, request, *args, **kwargs):
return self.update(request, *args, **kwargs)
def delete(self, request, *args, **kwargs):
return self.destroy(request, *args, **kwargs)
如何在issues
和pages
之间实现这种关系
发布于 2013-07-20 23:40:00
下面是我完成此操作的另一种方法:
views.py
from models import Customer, Order
from serializers import CustomerSerializer, OrderSerializer
from rest_framework import generics
class CustomerList(generics.ListCreateAPIView):
queryset = Customer.objects.all()
serializer_class = CustomerSerializer
class CustomerDetail(generics.RetrieveUpdateDestroyAPIView)
queryset = Customer.objects.all()
serializer_class = CustomerSerializer
class OrdersByCustomer(generics.ListCreateAPIView):
queryset = Order.objects.all()
serializer_class = OrderSerializer
def get_queryset(self):
customer_pk = self.kwargs['customer_pk']
return self.queryset.filter(customer__pk=customer_pk)
def pre_save(self, obj):
obj.customer_id = self.kwargs['customer_pk']
class OrderDetail(generics.RetrieveUpdateDestroyAPIView):
queryset = Order.objects.all()
serializer_class = OrderSerializer
serializers.py
from models import Customer, Order
from rest_framework import serializers
from rest_framework.reverse import reverse
class OrderSerializer(serializers.HyperlinkedModelSerializer)
class Meta:
model = Order
class CustomerSerializer(serializers.HyperlinkedModelSerializer)
orders = serializers.SerializerMethodField('get_customer_orders')
def get_customer_orders(self, obj):
return reverse('ordersbycustomer-list',
args=[obj.pk], request=self.context['request'])
class Meta:
model = Customer
urls.py
from django.conf.urls import patterns, include, url
from views import OrdersByCustomer, CustomerDetail, CustomerList
urlpatterns = patterns("",
url(r'^customers/(?P<customer_pk>.+)/orders/$', OrdersByCustomer.as_view(), name='ordersbycustomer-list'),
url(r'^customers/(?P<pk>.+)/$', CustomerDetail.as_view(), name='customer-detail'),
url(r'^customers/$', CustomerList.as_view(), name='customer-list'),
)
与视图集/路由器相比,涉及的代码更多,但这使您可以更好地控制正在发生的事情。
在这里,我选择仅将订单公开为客户的子项。由于它们是分开的,您可以使用不同的序列化程序类来处理list和detail。
发布于 2013-07-04 00:24:06
以下是我是如何使用Rest-Framework2.3版中的新ViewSets和Routers实现这一点的:
views.py:
from rest_framework import viewsets
from rest_framework.response import Response
from models import Order, OrderLine
from serializers import OrderSerializer, OrderLineSerializer
class OrderViewSet(viewsets.ModelViewSet):
queryset = Order.objects.all()
serializer_class = OrderSerializer
@link()
def lines(self, request, pk=None):
queryset = OrderLine.objects.filter(order__pk=pk)
serializer = OrderLineSerializer(queryset,
context={'request':request},
many=True)
return Response(serializer.data)
class OrderLineViewSet(viewsets.ModelViewSet):
queryset = OrderLine.objects.all()
serializer_class = OrderLineSerializer
serializers.py
from rest_framework import serializers
from models import Order, OrderLine
class OrderSerializer(serializers.HyperlinkedModelSerializer):
lines = serializers.HyperlinkedIdentityField(view_name='order-lines')
class Meta:
model = Order
class OrderLineSerializer(serializers.HyperlinkedModelSerializer):
class Meta:
model = OrderLine
urls.py
from views import OrderViewSet, OrderLineViewSet
from rest_framework.routers import DefaultRouter
router = DefaultRouter()
router.register(r'order', OrderViewSet)
router.register(r'orderline', OrderLineViewSet)
urlpatterns = router.urls
现在,' Order / id / Lines‘将返回一个序列化订单行的列表,这些订单行与由该id标识的订单具有关系。
当您向路由器注册视图时,用@link或@action修饰的ViewSet上的任何方法都将获得一个URL。
发布于 2014-07-17 19:15:42
我添加了def get_queryset(self):issue_id = self.kwargs'issue_id‘return Page.objects.filter(issue_id = issue_id)到PageList,现在GET works for issue/ /pages。现在我只需要弄清楚怎么发帖就行了。
我在PageList中添加了def pre_save(self,obj):obj.issue_id =self.kwargs‘’issue_id‘,现在POST也可以工作了。从一个不存在的问题中查询页面会返回一个空结果,而不是404 not found。如果有人知道做这件事的更好方法,我很想听听。
如果你的方法get_queryset(self)返回一个空列表而不是404Not FOUND,我建议使用django中的快捷函数get_list_or_404。该方法可能如下所示:
from django.shortcuts import get_list_or_404
def get_queryset(self):
filter = {}
filter['issue_id'] = self.kwargs['issue_id']
return get_list_or_404(self.queryset, **filter)
我知道这是一个古老的帖子,但也许这可以帮助其他有相同或类似问题的人。
https://stackoverflow.com/questions/17337843
复制相似问题