Question

我正在使用django-rest-framework，https://www.django-rest-framework.org/api-guide/serializers/

只有在?field=X参数中指定了字段时，才可以显示该字段吗？如果我尝试这样做：

class TopLevelJobSerializer(DynamicFieldsMixin, serializers.ModelSerializer):
    children_job_statuses = serializers.ReadOnlyField()

    class Meta:
        model = TopLevelJob # This inherits from Job, which has id, name
        fields = ('id', 'name')

我得到AssertionError: The field 'children_job_statuses' was declared on serializer TopLevelJobSerializer, but has not been included in the 'fields' option.

children_job_statuses是一个需要花费一些时间才能加载的属性。我只想通过调用/api/top_level_job/?fields=children_job_statuses

显式地调用它

我该怎么做？我需要一个全新的序列化器吗？

Answer 1

这对我有用：

def get_fields(self, *args, **kwargs):
    fields = super().get_fields(*args, **kwargs)
    request = self.context.get('request')
    if request is None or not 'fields' in request.query_params or 'children_job_statuses' not in \
            request.query_params['fields']:
        fields.pop('children_job_statuses', None)

    return fields

有没有一种方法可以仅在使用django-rest-framework指定时显示字段？

1 个答案: