django - 更新M2M关系django Rest框架(many=true)

Question

我尝试更新 channel :

PUT
content [{'url': 'http://localhost:8000/api/movies/2', 'title': u'Ariel', 'backdrop_path': u'/z2QUexmccqrvw1kDMw3R8TxAh5E.jpg', 'popularity': 0.082, 'poster_path': u'/8ld3BEg8gnynRsfj2AzbLocD8NR.jpg', 'release_date': datetime.date(1988, 10, 21), 'runtime': 69L, 'tagline': u'', 'vote_average': 9.0, 'vote_count': 0L}]
csrfmiddlewaretoken XXXXXXXXXXXXXXXXXXXXXXXXXXx
name    cody private
owner   http://localhost:8000/api/users/1
private 1

我收到此错误:

instance should be a queryset or other iterable with many=True

这是您需要了解正在发生的事情的代码。

class Channel(models.Model):
    """
    A channel is a "container" for a users movies and television shows.
    """
    PUBLIC_VISIBILITY, PRIVATE_VISIBILITY = 0, 1
    VISIBILITY_CHOICES = (
        (PUBLIC_VISIBILITY, 'public'),
        (PRIVATE_VISIBILITY, 'private'),
    )
    owner = models.ForeignKey(User, related_name='owned_channels')
    name = models.CharField(max_length=60)
    content = models.ManyToManyField(Movie, db_table='channel_contents',
                                     related_name='channels', null=True, blank=True, default=None)
    subscribers = models.ManyToManyField(User, db_table='channel_subscribers',
                                         related_name='subscribed_channels', null=True, blank=True, default=None)
    created = models.DateTimeField(auto_now_add=True)
    last_mod = models.DateTimeField(auto_now=True)
    query = models.CharField(max_length=255, default='')
    private = models.IntegerField(choices=VISIBILITY_CHOICES, default=PRIVATE_VISIBILITY)

    default = models.BooleanField(default=False)


class Movie(models.Model):
    id = models.BigIntegerField(primary_key=True)
    adult = models.BooleanField()
    backdrop_path = models.ImageField(upload_to='backdrop/')
    budget = models.IntegerField(blank=True, null=True)
    genres = models.ManyToManyField('Genre',
                                    through='MovieGenre',
                                    blank=True, null=True)
    homepage = models.URLField(blank=True, null=True)
    imdb_id = models.CharField(max_length=20, blank=True, null=True)
    original_title = models.CharField(max_length=100)
    overview = models.TextField(blank=True, null=True)
    popularity = models.FloatField(blank=True, null=True)
    poster_path = models.ImageField(upload_to='poster/')
    release_date = models.DateField(blank=True, null=True)
    revenue = models.IntegerField(blank=True, null=True)
    runtime = models.IntegerField(blank=True, null=True)
    tagline = models.CharField(max_length=200, blank=True, null=True)
    title = models.CharField(max_length=100, db_index=True)
    vote_average = models.FloatField(blank=True, null=True)
    vote_count = models.IntegerField(blank=True, null=True)
    actors = models.ManyToManyField('Actor',
                                    through='MovieActor',
                                    blank=True, null=True)
    directors = models.ManyToManyField('Director',
                                       through='MovieDirector',
                                       blank=True, null=True)
    production_companies = models.ManyToManyField(
        'ProductionCompany',
        through='MovieProduction',
        blank=True, null=True)

channel 序列化代码:

# Routes
url(r'^channels$', ChannelList.as_view(), name='channel-list'),
url(r'^channels/(?P<pk>\d+)$', ChannelDetail.as_view(), name='channel-detail'),

# Views
class ChannelList(generics.ListCreateAPIView):
    """
    API endpoint that represents a list of users.
    """
    model = Channel
    serializer_class = ChannelSerializer

class ChannelDetail(generics.RetrieveUpdateDestroyAPIView):
    """
    API endpoint that represents a single users.
    """
    model = Channel
    serializer_class = ChannelSerializer

# Serializer
class ChannelSerializer(serializers.HyperlinkedModelSerializer):
    content = MovieSerializer(many=True)

    class Meta:
        model = Channel
        fields = ('url', 'owner', 'name', 'content', 'private')

Answer 1

正如您可以阅读的那样 here ，嵌套关系目前不支持写操作。使用HyperlinkedRelatedField相反，或者编写一个自定义序列化器来实现您需要的功能。