如何在DB模型中使用DRF自定义序列化程序字段 [英] How to use DRF Custom serializer field with DB model

问题描述

我正在使用具有二进制字段的关系数据库，那么如何使用DRF序列化程序保存字段值

I'm using relation database which is having Binary Field, So how can I use DRF serializer to save the field value

我已经参考了文档 https://www.django-rest-framework.org/api- guide / fields /＃custom-fields
并理解其中的一部分并在下面创建，但是我不确定如何在序列化程序中使用它

I have referred the documentation https://www.django-rest-framework.org/api-guide/fields/#custom-fields and understood some of the part and created below, but I'm not sure how to use it in serializer

模型

class MyData(models.Model):
    data = models.BinaryField()

自定义字段

class BinaryField(serializers.Field):
    def to_representation(self, value):
        return value.decode('utf-8')

    def to_internal_value(self, value):
         return value.encode('utf-8')

但是我应该如何在b中使用它低级序列化器

But how should I use this in my below serializer

class BlobDataSerializer (serializers.ModelSerializer):
    class Meta:
        model = MyData
        fields = ('id', 'data')

因此基本上我试图将传入的数据存储在二进制字段中。预先感谢

So basically I'm trying to store incoming data in binary field. Thanks in advance

推荐答案

像这样：

class BlobDataSerializer (serializers.ModelSerializer):
    class Meta:
        model = MyData
        fields = ('id', 'data')

    data = BinaryField()

对于更可重用的解决方案，您还可以继承ModelSerializer并自定义 serializer_field_mapping 。

For a more reusable solution, you could also subclass ModelSerializer and customize the serializer_field_mapping.

请参见 https://www.django-rest-framework.org/api-guide/serializers/#customizing-field-mappings

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