我正在开发一个基于 Django 的 cargo 管理应用程序。我们已经集成了 Django Rest Framework 并公开了几个端点。
现在名为“port_manager”的 django 应用程序具有以下模型...
模型.py
from location.models import CountryList, DistrictList
class PortList(models.Model):
name = models.CharField(max_length=45)
countryList_id = models.ForeignKey(CountryList, models.SET_NULL, blank=True, null=True, verbose_name='related country')
iso_code = models.CharField(max_length=10)
short_code = models.CharField(max_length=10, null=True, blank=True)
status = models.BooleanField(default=True)
def __str__(self):
return self.name
class PortDetail(models.Model):
port = models.OneToOneField(PortList, models.CASCADE, verbose_name='related port', primary_key=True)
phone = models.CharField(max_length=15)
district_list_id = models.ForeignKey(DistrictList, models.SET_NULL, blank=True, null=True,
verbose_name='related district')
email = models.EmailField()
fax = models.CharField(max_length=100, null=True, blank=True)
address = models.TextField()
map_location = models.CharField(max_length=45, null=True, blank=True)
other_information = models.TextField(null=True, blank=True)
current_pricing = models.IntegerField(null=True, blank=True)
def __str__(self):
return self.port.name+' Details'
序列化器.py
from rest_framework import serializers
from port_manager.models import PortList, PortDetail
from location.models import CountryList, DistrictList
class PortListSerializer(serializers.ModelSerializer):
countryList_id = serializers.PrimaryKeyRelatedField(queryset=CountryList.objects.all(), write_only=True)
class Meta:
model = PortList
fields = ('name', 'countryList_id', 'iso_code')
class PortDetailSerializer(serializers.ModelSerializer):
district_list_id = serializers.PrimaryKeyRelatedField(queryset=DistrictList.objects.all(),)
class Meta:
model = PortDetail
fields = ('port', 'phone', 'district_list_id', 'email', 'fax', 'address',
'map_location', 'other_information', 'current_pricing')
class PortSerializer(serializers.ModelSerializer):
port = PortListSerializer()
district_list_id = serializers.PrimaryKeyRelatedField(queryset=DistrictList.objects.all(), write_only=True)
class Meta:
model = PortDetail
def create(self, validated_data):
port_data = validated_data.pop('port')
port = PortList.objects.create(**port_data)
PortDetail.objects.create(port=port, **validated_data)
return PortDetail
现在，当我使用 CURL POST 到终点时，它会插入到数据库中的两个表中，但会引发错误 (400)
curl 示例 POST 请求
curl -H "Authorization: Token afab77f7c9320d396442eb1aef9a3bd5de54c3ce" -X POST -d '{"port":{"name":"Singapore", "countryList_id":"3", "iso_code":"SIN", "short_code":"898"},"district_list_id":"9", "email":"asd@aassd.com", "fax":"23423432", "other_information":"adasd sdas", "address":"asdas asd", "phone":"123412312"}' http://example.org/api/v1/portcombined/
来自 Django 错误日志的完整堆栈:
Internal Server Error: /api/v1/portcombined/
Traceback (most recent call last):
File "/usr/local/lib/python3.5/site-packages/django/core/handlers/base.py", line 149, in get_response
response = self.process_exception_by_middleware(e, request)
File "/usr/local/lib/python3.5/site-packages/django/core/handlers/base.py", line 147, in get_response
response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/usr/local/lib/python3.5/site-packages/django/views/decorators/csrf.py", line 58, in wrapped_view
return view_func(*args, **kwargs)
File "/usr/local/lib/python3.5/site-packages/django/views/generic/base.py", line 68, in view
return self.dispatch(request, *args, **kwargs)
File "/usr/local/lib/python3.5/site-packages/rest_framework/views.py", line 466, in dispatch
response = self.handle_exception(exc)
File "/usr/local/lib/python3.5/site-packages/rest_framework/views.py", line 463, in dispatch
response = handler(request, *args, **kwargs)
File "/usr/local/lib/python3.5/site-packages/rest_framework/decorators.py", line 53, in handler
return func(*args, **kwargs)
File "/home/gpsl/sites/container/src/port_manager/views.py", line 143, in port_merged
return JSONResponse(serializer.data, status=201)
File "/usr/local/lib/python3.5/site-packages/rest_framework/serializers.py", line 503, in data
ret = super(Serializer, self).data
File "/usr/local/lib/python3.5/site-packages/rest_framework/serializers.py", line 239, in data
self._data = self.to_representation(self.instance)
File "/usr/local/lib/python3.5/site-packages/rest_framework/serializers.py", line 472, in to_representation
ret[field.field_name] = field.to_representation(attribute)
File "/usr/local/lib/python3.5/site-packages/rest_framework/serializers.py", line 463, in to_representation
attribute = field.get_attribute(instance)
File "/usr/local/lib/python3.5/site-packages/rest_framework/relations.py", line 157, in get_attribute
return get_attribute(instance, self.source_attrs)
File "/usr/local/lib/python3.5/site-packages/rest_framework/fields.py", line 80, in get_attribute
instance = getattr(instance, attr)
AttributeError: 'ForwardManyToOneDescriptor' object has no attribute 'countryList_id'
感谢大家花时间完成所有这些。
请您参考如下方法:
问题是上下文没有传递给嵌套序列化器。您的 PortSerializer 类应该有一个 __init__ 方法，您应该在那里明确地将上下文传递给您的嵌套序列化程序。请参见下面的示例:
class PortSerializer(serializers.ModelSerializer):
def __init__(self, *args, **kwargs):
super(PortSerializer, self).__init__(*args, **kwargs)
self.fields['port'] = PortListSerializer(context=self.context)
