嵌套对象的 HTTP 请求

Question

是否可以使用库“requests”（python 的 HTTP 库）在 django rest 框架中发布和更新嵌套对象？

我在序列化程序中创建了一个新的创建方法，但我不能在 shell 之外发布，也不能在请求库或 api webview 中发布。

我的序列化器：

class QualityParameterSerializer(serializers.ModelSerializer):

    class Meta:
        model = QualityParameter
        fields = ("id","name", "value")


class ProductQualityMonitorSerializer(serializers.ModelSerializer):

    parameters = QualityParameterSerializer(many=True)

    class Meta:
        model = ProductQualityMonitor
        fields = ("id","product_name", "area", "timeslot", "processing_line",
          "updated_on",'parameters')

    def create(self, validated_data):
        params_data = validated_data.pop('parameters')
        product = ProductQualityMonitor.objects.create(**validated_data)
        for param_data in params_data:
            QualityParameter.objects.create(product=product, **param_data)
        return product

POST HTTP request

Answer 1

如果我可以为您的序列化程序建议以下表格：

from django.db import transaction

class ProductQualityMonitorSerializer(serializers.ModelSerializer):

    parameters = QualityParameterSerializer(many=True)

    class Meta:
        model = ProductQualityMonitor
        fields = (
            "id",
            "updated_on",
            "product_name", 
            "area", 
            "timeslot", 
            "processing_line", 
            "parameters", 
        )

    def create(self, validated_data):
        # we will use transactions, so that if one of the Paramater objects isn't valid
        # that we will rollback even the parent ProductQualityMonitor object creation, 
        # leaving no dangling objects in the database
        params_data = validated_data.pop('parameters')
        with transaction.atomic():
            product = ProductQualityMonitor.objects.create(**validated_data)
            # you can create the objects in a batch, hitting the dB only once
            params = [QualityParameter(product=product, **param) for param in params_data]
            QualityParameter.objects.bulk_create(params)

        return product

关于使用python requests 库：发布到django后端时需要注意以下几个方面：

• 您必须在请求中提供有效的 CSRF 令牌；这样做的方式是通过 csrf-token cookie；
• 您必须提供正确的身份验证标头/令牌/cookie；这是您的选择，取决于您如何在 DRF 后端实现此功能
• 如果这是从一个域到另一个域的请求，那么您必须注意 CORS 设置。

更重要的是：您已经尝试过什么但没有奏效？