django - 如何在 django rest 框架模型中创建 created_by 字段？

Question

我想在 django rest 框架模型中创建一个 created_by 字段。

它应该包含当前登录用户的 user_id 并且应该是这样的，我不需要在 POST 请求期间以 JSON 格式发送它，它应该从请求本身中获取，我如何使用 django rest 框架序列化程序实现它。

模型.py文件:

class Company(models.Model):
    """Company model for information about company."""

    created_by = models.ForeignKey(User, null= True, blank= True, on_delete=models.CASCADE)
    company_name = models.CharField(max_length=100)

serializers.py 文件:

class CompanySerializer(serializers.ModelSerializer):
"""Serializer for companies."""

    class Meta:
        model = Company
        fields = ('id', 'created_by', 'company_name')

v1.py 文件:

class CompanyList(APIView):
"""Get and post companies data."""

    def get(self, request, format=None):
        """Get companies data.."""
        companies = Company.objects.all()
        serialized_companies = CompanySerializer(companies, many=True)
        return Response(serialized_companies.data)

    def post(self, request, format=None):
        """Post companies data."""
        serializer = CompanySerializer(data=request.data)
        if serializer.is_valid():
            serializer.save()
            return Response(serializer.data, status=status.HTTP_201_CREATED)
        return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)

Answer 1

方法一:使用 CurrentUserDefault() 选项

您可以通过default created_by 中的参数字段为 serializers.CurrentUserDefault()它将其值设置为当前用户。

class CompanySerializer(serializers.ModelSerializer):
"""Serializer for companies."""

    class Meta:
        model = Company
        fields = ('id', 'created_by', 'company_name')
        extra_kwargs = {'created_by': {'default': serializers.CurrentUserDefault()}}

方法二:通过 user在 serializer.save()

您可以设置字段 created_by如 read_only然后通过 request.user至 serializer.save() .

serializers.py

class CompanySerializer(serializers.ModelSerializer):
"""Serializer for companies."""

    class Meta:
        model = Company
        fields = ('id', 'created_by', 'company_name')
        extra_kwargs = {'created_by': {'read_only':True}}

v1.py

class CompanyList(APIView):
"""Get and post companies data."""

    def post(self, request, format=None):
        """Post companies data."""
        serializer = CompanySerializer(data=request.data)
        if serializer.is_valid():
            serializer.save(created_by=request.user) # pass current user
            return Response(serializer.data, status=status.HTTP_201_CREATED)
        return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)