Re: Django rest framework cannot deal with multple objects in model viewset

Em quinta-feira, 20 de abril de 2017 23:18:03 UTC-3, Robin Lery escreveu:

I have a very simple model and its related serializer and views:

class Page(models.Model):
    user = models.ForeignKey(User)
    title = models.CharField(max_length=255)
    pub_date = models.DateTimeField(default=timezone.now)

class PageSerializer(serializers.ModelSerializer):
    class Meta:
        model = Page
        fields = ('user', 'title', 'pub_date')

class PageViewSet(viewsets.ModelViewSet):
    queryset = Page.objects.all()
    serializer_class = PageSerializer
Now I can post like this:

{
    "user": 1,
    "title": "Lorem ipsum"
}
This works fine. But I would like to post multiple objects like this:

[
    {
        "user": 1,
        "title": "Lorem ipsum one"
    },
    {
        "user": 1,
        "title": "Lorem ipsum two"
    }
]
But this gives me an error:

"non_field_errors": [

"Invalid data. Expected a dictionary, but got list."
]
So to accept multple objects I modified the view as per the doc:

class PageViewSet(viewsets.ModelViewSet):
    queryset = Page.objects.all()
    serializer_class = PageSerializer(queryset, many=True)

But I am getting an error:

TypeError at /api/blog/pages/

'ListSerializer' object is not callable
What am I missing here?

You can do this overriding get_serializer method: 

def get_serializer(self, *args, **kwargs):

if "data" in kwargs:

data = kwargs["data"]

# check if many is required

if isinstance(data, list):

kwargs["many"] = True

return super(YourModel, self).get_serializer(*args, **kwargs)  

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