python - Django Rest框架序列化器: required_fields

Question

是否可以将必填字段设置为序列化器内的列表？ 我不想用每行中的类型覆盖每个字段，如下所示:

    name = serializers.CharField(required=True)
    description = serializers.CharField(required=True)
    date_start = serializers.DateTimeField(required=True)
    date_end = serializers.DateTimeField(required=True)

我只想枚举字段的名称

class CampaignStepFirstSerializer(serializers.ModelSerializer):
    class Meta:
        model = Campaign
        fields = (
            'name',
            'description',
            'date_start',
            'date_end',
        )
        required_fields = fields

Answer 1

如果模型字段是用null=True或blank=True实例化的，或者如果模型字段有默认值，则序列化器将自动设置相应的字段为 required=False。 (参见 rest_framework.utils.field_mapping.get_field_kwargs 的来源)。

如果您需要覆盖此行为，可以执行以下操作:

class CampaignStepFirstSerializer(serializers.ModelSerializer):
    class Meta:
        model = Campaign
        fields = (
            'name',
            'description',
            'date_start',
            'date_end',
        )

        # 1st option. If some fields are required
        extra_kwargs = {
            'name': {'required': True},
            'description': {'required': True},
            'date_start': {'required': True},
            'date_end': {'required': True},
        }

        # 2nd option. If all the fields are required:
        extra_kwargs = {i:{'required': True} for i in fields}