Question

这是我的序列化程序类。我希望与UserSerializer到SnapCapsulesSerializer建立一对多的关系。我允许将SnapCapsule添加到UserSerializer，因此每个用户都可以访问其snapcapsule。这是我在创建关系序列化程序时引用的链接。 http://www.django-rest-framework.org/api-guide/relations/#writable-nested-serializers

class UserSerializer(serializers.HyperlinkedModelSerializer):
    snapcapsules = SnapCapsuleSerializer(
        many=True,
        read_only=True,
        allow_null=True,
    )

    class Meta:
        model = User
        fields = ('snapcapsules', 'url', 'username', 'email', 'password')
        write_only_fields = ('password',)

    def create(self, validated_data):
        user = User.objects.create(
            username=validated_data['username'],
            email=validated_data['email'],
        )

        user.set_password(validated_data['password'])
        user.save()

        return user

    def update(self, instance, validated_data):
        assert (validated_data), "No data recieved."
        for capsule in validated_data.get("snapcapsules", []):
            snapcapsulea = instance.snapcapsules
            snapcapsule = SnapCapsule.object.create(user=instance.username,
                                                    **capsule)
            snapcapsule.save()
            snapcapsules.append(snapcapsule)
            instance.snapcapsules = snapcapsule
            instance.save()

        return instance

这是前端请求。无论出于何种原因，以这种格式发送发送请求时，django validatedData为空。我相信FormData确实知道如何处理数组。（MyForm是一个已安装的FormData类）我也尝试了JSON.stringify（capsule），但它不起作用。 Can I append an array to 'formdata' in javascript?

export default class CapsuleForm extends React.Component {
  constructor (props) {
    super(props);

    this.state = {
      userUrl: this.props.auth.domain + "/users/" + this.props.userID + "/",
      dateToPost: moment().add(1, "m"),
      image: null,
      caption: "",
      redirect: false,
      invalidFormSubmit: false
    };

    this.handleChange = this.handleChange.bind(this);
    this.handleFormSubmit = this.handleFormSubmit.bind(this);
    this.handleDateChange = this.handleDateChange.bind(this);
  }


  handleFormSubmit(e) {
    e.preventDefault();

    var capsule = new MyForm();
    capsule.append("dateToPost", this.state.dateToPost.format());
    capsule.append("image", this.state.image);
    capsule.append("caption", this.state.caption);

    var snapcapsules = new MyForm();

    snapcapsules.append("snapcapsules", [capsule])

    axios.patch(this.state.userUrl, snapcapsules)
    .then(() => {
      this.setState({redirect: true})
    }).catch(err =>{
      alert(err);
    })
}

Django Rest Framework解析FormData数组

0 个答案: