DRF The submitted data was not a file. Check the encoding type on the form - ImageField

Question

DRF The submitted data was not a file. Check the encoding type on the form - ImageField

Navigation

#1 by (1 votes)

0

I have the following model User:

class User(AbstractBaseUser, PermissionsMixin):
#... other attributes  
    photo = models.ImageField(upload_to='avatars', blank=True)

The basic serialization that I made of this model is:

class UserSerializer(serializers.ModelSerializer):
    team = serializers.StringRelatedField()

    def setup_eager_loading(queryset):
      queryset = queryset.select_related('team',)

    class Meta:
        model = User
        fields = ('url', 'username','password','first_name','last_name',
        'photo','team','position','last_login',)

The team field is a foreign key in the User model, which is serialized to optimize its performance in queries to the database when there are relations, with the setup_eager_loading function method.

The viewset function of the User model is:

from rest_framework import viewsets
from rest_framework import filters

from .models import User
from .serializers import UserSerializer

# Viewsets define the behavior of the view
class UserViewSet(viewsets.ModelViewSet):
    """
    API endpoint that allows users to be viewed or edited.
    """
    queryset = User.objects.all().order_by('-date_joined')
    serializer_class = UserSerializer
    filter_fields = ('username','is_player', 'first_name','last_name','team','email',)

When I go to an instance of a user in my serialized api via Django Rest Framework, and I want to update some data (any) of that instance through pure json data (json raw data media type: application / json) I get this message:

How can I manipulate at the CRUD level the User objects serialized in my api through pure json data in Django Rest Framework without having coding errors?

json django djangorestframework

asked by bgarcial 29.10.2016 в 02:12

source

1 answer

How to detect if an object $ error of AngularJs forms is empty? checksum issues

score 1 · Answer 1

That happens because you are waiting for a file to be sent to the photo field, if you are going to do an edition from the browsable API, it sends a POST and this is resolved by "replacing" all the values of the model by which you are sending and how you send application / json instead of multipart throws the error of could not decode that file field.

If you make the request with AJAX, cURL, etc ... you could send a PATCH and in this way update partially and it would work without problem.

I recommend you use Postman to make the requests since the DRF Browsable API falls short.

Greetings. I hope I have helped you.

EDIT:

How to make the request using jQuery AJAX:

var username = 'mauricio';
$.ajax({
   url: '/api/users/'+username+'/',
   method: 'PATCH', 
   data : {
      first_name: 'Mauricio Alberto'
   },
   success: function(response){
     console.log(response);
   },
   error: function(response){
     console.warn(response);
   }
});

This example is partially updated using PATCH, that is, only the first_name field is modified.