我使用Tastypie和neo4django。我关注https://gist.github.com/mhluongo/5789513和http://django-tastypie.readthedocs.org/en/latest/interacting.html。现在，在（新）提交的POST或PUT时，我坚持忽略某些关系的值（通过resource_uri？！）。 “'unicode'对象没有属性'pk'”。
submission.py
from neo4django.db import models
from core.models.user import AppUser
from core.models.slide import Slide
class Submission(models.NodeModel):
value = models.ArrayProperty()
started = models.DateTimeProperty()
finished = models.DateTimeProperty()
user = models.Relationship(AppUser,
rel_type='answered_by',
single=True,
related_name='submissions'
)
slide = models.Relationship(Slide,
rel_type='response_to',
single=True,
related_name='submissions'
)
api.py
class UserResource(ModelResource):
class Meta:
queryset = AppUser.objects.all()
resource_name = 'user'
excludes = ['password']
allowed_methods = ['get']
authentication = BasicAuthentication()
class SlideResource(ModelResource):
class Meta:
queryset = Slide.objects.all()
resource_name = 'slide'
excludes = ['answers', 'require_order', 'require_all']
authorization = Authorization()
class SubmissionResource(ModelResource):
class Meta:
queryset = Submission.objects.all()
resource_name = 'submission'
excludes = ['require_order', 'require_all']
authorization = Authorization()
urls.py
from django.conf.urls import patterns, include, url
from api.api import *
user_resource = UserResource()
slide_resource = SlideResource()
submission_resource = SubmissionResource()
urlpatterns = patterns('',
url(r'^api/', include(user_resource.urls)),
url(r'^api/', include(slide_resource.urls)),
url(r'^api/', include(submission_resource.urls)),
)
curl ... / submission / schema /
{"allowed_detail_http_methods": ["get", "post", "put", "delete", "patch"], "allowed_list_http_methods": ["get", "post", "put", "delete", "patch"], "default_format": "application/json", "default_limit": 20, "fields": {"finished": {"blank": false, "default": "No default provided.", "help_text": "A date & time as a string. Ex: \"2010-11-10T03:07:43\"", "nullable": true, "readonly": false, "type": "datetime", "unique": false}, "id": {"blank": true, "default": "", "help_text": "Integer data. Ex: 2673", "nullable": false, "readonly": false, "type": "integer", "unique": true}, "resource_uri": {"blank": false, "default": "No default provided.", "help_text": "Unicode string data. Ex: \"Hello World\"", "nullable": false, "readonly": true, "type": "string", "unique": false}, "slide": {"blank": true, "default": "", "help_text": "Unicode string data. Ex: \"Hello World\"", "nullable": false, "readonly": false, "type": "string", "unique": false}, "started": {"blank": false, "default": "No default provided.", "help_text": "A date & time as a string. Ex: \"2010-11-10T03:07:43\"", "nullable": true, "readonly": false, "type": "datetime", "unique": false}, "user": {"blank": true, "default": "", "help_text": "Unicode string data. Ex: \"Hello World\"", "nullable": false, "readonly": false, "type": "string", "unique": false}, "value": {"blank": false, "default": "No default provided.", "help_text": "Unicode string data. Ex: \"Hello World\"", "nullable": true, "readonly": false, "type": "string", "unique": false}}}
错误：
HTTP/1.1 500 INTERNAL SERVER ERROR
Server: nginx/1.1.19
Date: Sat, 09 Nov 2013 15:20:35 GMT
Content-Type: application/json
Transfer-Encoding: chunked
Connection: keep-alive
{"error_message": "'unicode' object has no attribute 'pk'",
"traceback": "Traceback (most recent call last):\n\n File \"/opt/phaidra/env/local/lib/python2.7/site-packages/tastypie/resources.py\", line 195,
in wrapper\n response = callback(request, *args, **kwargs)\n\n File \"/opt/phaidra/env/local/lib/python2.7/site-packages/tastypie/resources.py\", line 435,
in dispatch_detail\n return self.dispatch('detail', request, **kwargs)\n\n File \"/opt/phaidra/env/local/lib/python2.7/site-packages/tastypie/resources.py\", line 458,
in dispatch\n response = method(request, **kwargs)\n\n File \"/opt/phaidra/env/local/lib/python2.7/site-packages/tastypie/resources.py\", line 1408,
in put_detail\n updated_bundle = self.obj_update(bundle=bundle, **self.remove_api_resource_names(kwargs))\n\n File \"/opt/phaidra/env/local/lib/python2.7/site-packages/tastypie/resources.py\", line 2144,
in obj_update\n return self.save(bundle, skip_errors=skip_errors)\n\n File \"/opt/phaidra/env/local/lib/python2.7/site-packages/tastypie/resources.py\", line 2230,
in save\n bundle.obj.save()\n\n File \"/opt/phaidra/env/src/neo4django/neo4django/db/models/base.py\", line 315,
in save\n return super(NodeModel, self).save(using=using, **kwargs)\n\n File \"/opt/phaidra/env/local/lib/python2.7/site-packages/django/db/models/base.py\", line 546,
in save\n force_update=force_update, update_fields=update_fields)\n\n File \"/opt/phaidra/env/src/neo4django/neo4django/db/models/base.py\", line 333,
in save_base\n self._save_neo4j_relationships(self, self.__node)\n\n File \"/opt/phaidra/env/src/neo4django/neo4django/db/models/relationships.py\", line 333,
in _save_\n rels[key]._save_relationship(instance, node, state[key])\n\n File \"/opt/phaidra/env/src/neo4django/neo4django/db/models/relationships.py\", line 499,
in _save_relationship\n rels.single = self._create_neo_relationship(node, other)\n\n File \"/opt/phaidra/env/src/neo4django/neo4django/db/models/relationships.py\", line 377,
in _create_neo_relationship\n if obj.pk is None:
AttributeError: 'unicode' object has no attribute 'pk'\n"}
设置非关系属性可以正常工作。创建新提交会返回相同的错误，但创建没有“崩溃”关系。我想知道这对于neo4django的ModelRessource是否也不行。非常感谢。