将许多序列化程序添加到嵌套的序列化器字段中

Question

serializers.py

class BusOncomingSerializer(serializers.Serializer):
    idn = serializers.IntegerField(read_only=True)
    stops_left = serializers.IntegerField(read_only=True)


class StopOncomingSerialier(serializers.Serializer):
    idn = serializers.IntegerField(read_only=True)
    buses = BusOncomingSerializer(many=True)

我的序列化程序实例在列表中有效，如下所示：

buses_serializers = [bus1, bus2, bus3]
# busX means instance of BusOncomingSerializer and they are valid.

我正在尝试将这些BusOncomingSerializer实例添加到单个StopOncomingSerializer实例中：

serializer = serializers.StopOncomingSerializers(data={"idn": 1, "buses": buses_serializers})

我跑is_valid()。然而，它提出了：

  

TypeError： BusOncomingSerializer（data = {'idn'：285，'stops_left'：7}）：idn = IntegerField（read_only = True）stops_left = IntegerField（read_only = True）不是JSON序列化

如果我没有用列表添加序列化程序实例，还有其他方法吗？

环境

• python 3.5.1
• django 1.9.5
• django-rest-framework 3.3.3

Answer 1

您将数据错误地传递给StopOncomingSerializer。您应该将值作为字典列表传递，而不是传递bus个实例。

示例数据格式：

{
    'idn': 7, 
    'buses': [
        {'idn':3, 'stops_left': 3}, 
        {'idn': 4, 'stops_left':6}
    ]
}

在Python Shell上：

In [5]: data = {'idn': 7, 'buses': [{'idn':3, 'stops_left': 3}, {'idn': 4, 'stops_left':6}]}

In [6]: s1 = StopOncomingSerialier(data=data)

In [7]: s1.is_valid()
Out[7]: True