Question

我有一个序列化程序，可以与对象pk进行POST并获取整个嵌套对象：

val spark = ...

import spark.implicits._

def readCsv[T: Encoder[T]](path: String): Dataset[T] = {
  spark
    .read
    .option("header", "true")
    .csv(path)
    .as[T]
}

val infoDS = readCsv[InfoData]("/src/main/info.csv")

我的一些数据以FormData（）来自我的React前端，因此它不是表示对象pk的整数列表，而是将其转换为字符串列表。发布到使用此序列化程序的Viewset时：

class CountryField(serializers.PrimaryKeyRelatedField):
    '''
    This serializer allows GET requests to return the full nested Country
    object, but use the pk for POST/PUT/PATCH requests. This serializer is used
    with the Trip Report and User Detail serializers to simplify handling
    requests from the frontend. This serializer is used on the User & Trip
    Report Views. This makes POST & PUT requests from the frontend easy to
    maintain, e.g. the pk can be stored as the value of an option on a select
    form, instead of having to store the entire country object.
    '''
    def to_representation(self, value):
        pk = super(CountryField, self).to_representation(value)
        try:
            item = Country.objects.get(pk=pk)
            serializer = CountrySerializer(item)
            return serializer.data
        except Country.DoesNotExist:
            return None

    def get_choices(self, cutoff=None):
        queryset = self.get_queryset()
        if queryset is None:
            return {}

        return OrderedDict([(item.id, str(item)) for item in queryset])

我收到错误类型错误。预期pk值，收到str。我在哪里可以编写一种方法来将该字符串列表转换为整数列表？

更多背景：在向模型中添加图像字段后，只需要将POST数据转换为FormData（）。当我最初以pk列表发布时，我没有问题，但是现在它是FormData（），我得到了错误。

Django Rest Framework自定义序列化方法将FormData（）从字符串转换为int

0 个答案: