这是我的序列化器:
class PostSerializer(serializers.ModelSerializer):
class Meta:
model = Post
fields = ('user', 'post', 'reblog',)
def create(self, validated_data):
post = Post(
user = validated_data['user'],
post = validated_data['post'],
)
post.save()
# manually create a list of "reblog" users
post.reblog.add(validated_data['user'])
return post
这是我的模特:
class Post(models.Model):
user = models.ForeignKey(User)
post = models.CharField(max_length=400)
reblog = models.ManyToManyField(User)
现在,我不希望我的reblog字段在数据库中永远为空(它可以是一个空列表,但不是null)。所以我没有设置" null = True"在模型领域。但是,最终用户不必提供" reblog"用户在创建帖子时(我会在create()mtehod中手动执行此操作。)
我知道这里:http://www.django-rest-framework.org/api-guide/fields/#core-arguments它说我可以添加" required = false"到一个序列化器字段,但我在序列化程序中使用的字段直接来自模型(即fields =(' reblog'))。
根据我的理解,我无法添加" required = false"我的模特因为这里: https://docs.djangoproject.com/en/1.8/ref/models/fields/它没有提及"必需"作为模型字段的参数。
话虽如此,我怎样才能得到我的" reblog"在serailzation / deserialization期间不需要ModelSerializer字段?
编辑:处理发送的帖子请求的视图是:
class post_list(APIView):
"""
List all posts or create a new post.
"""
permission_classes = (IsAuthenticated,)
def get(self, request):
posts = Post.objects.all()
serializer = PostSerializer(posts, many=True)
return Response(serializer.data)
def post(self, request):
serializer = PostSerializer(data=request.DATA)
if serializer.is_valid():
serializer.save()
return Response(serializer.data, status=status.HTTP_201_CREATED)
return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
pip freeze:
You are using pip version 6.1.1, however version 7.1.2 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.
Django==1.8
djangorestframework==3.1.1
uWSGI==2.0.10
答案 0 :(得分:1)
将参数blank=True
添加到模型字段:
class Post(models.Model):
user = models.ForeignKey(User)
post = models.CharField(max_length=400)
reblog = models.ManyToManyField(User, blank=True)
#^^^^^^^^^^
现在,请求可能会省略该参数,但它可能永远不会是NULL
值。
urls.py
(基本上内联serializers.py
):
from django.conf.urls import url, include
from rest_framework import routers, serializers, viewsets
from proj.models import Post
# Serializers define the API representation.
class PostSerializer(serializers.ModelSerializer):
class Meta:
model = Post
fields = ('user', 'post', 'reblog',)
def create(self, validated_data):
post = Post(
user = validated_data['user'],
post = validated_data['post'],
)
post.save()
# manually create a list of "reblog" users
post.reblog.add(validated_data['user'])
return post
class PostViewSet(viewsets.ModelViewSet):
queryset = Post.objects.all()
serializer_class = PostSerializer
# Routers provide an easy way of automatically determining the URL conf.
router = routers.DefaultRouter()
router.register(r'Post', PostViewSet)
# Wire up our API using automatic URL routing.
# Additionally, we include login URLs for the browsable API.
urlpatterns = [
url(r'^', include(router.urls)),
url(r'^api-auth/', include('rest_framework.urls', namespace='rest_framework'))
]
models.py
:
from django.contrib.auth.models import User
from django.db import models
class Post(models.Model):
user = models.ForeignKey(User)
post = models.CharField(max_length=400)
reblog = models.ManyToManyField(User, blank=True,related_name='reblog_users')
现在,当我发送POST请求时:
{
"user": 1,
"post": "foo"
}
它返回:
{
"user": 1,
"post": "foo",
"reblog": [
1
]
}
pip freeze
:
Django==1.8.4
djangorestframework==3.2.4