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POTastypie Neo4django 'unicode' object has no attribute 'pk'
 

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    <p>I use Tastypie with neo4django. I follow <a href="https://gist.github.com/mhluongo/5789513" rel="nofollow">https://gist.github.com/mhluongo/5789513</a> and <a href="http://django-tastypie.readthedocs.org/en/latest/interacting.html" rel="nofollow">http://django-tastypie.readthedocs.org/en/latest/interacting.html</a>. Now I stuck in overgiving the value for some relations (via the resource_uri?!) while the POST or PUT of (new) submissions. "'unicode' object has no attribute 'pk'". </p> <p>submission.py </p> <pre><code>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' ) </code></pre> <p>api.py </p> <pre><code>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() </code></pre> <p>urls.py </p> <pre><code>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)), ) </code></pre> <p>curl .../submission/schema/</p> <pre><code>{"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 &amp; 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 &amp; 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}}} </code></pre> <p>Error: </p> <pre><code>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"} </code></pre> <p>Setting non-relation attributes works fine. Creating a new submission returns the same error, but creation is done without the "crashed" relations. I wonder if this should not work as well with the ModelRessource for neo4django. Thanks a lot.</p>
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    1. COTake a look at this answer by Pierre Romera at a relevant `tastypie` issue on Github https://github.com/scholrly/neo4django/issues/184#issuecomment-27853853 . I had no time to check it yet, but I am pretty sure you will get your answer there.
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