I'm trying to learn to work with Neo4jdatabase in my django projects. I installed Neo4Django from github repository. and following its neo4j tutorial when I try to create a new object from my model I encounter with this error:
KeyError: 'GremlinPlugin'
I'm using Python 2.7, Django Version 1.5.8, Pycharm 3
My model is:
class Movie(models.NodeModel):
# name of the movie
title = models.StringProperty()
and my console code for creating the object is:
from nodes_app.models import Movie
movie = Movie.objects.create(title='a')
and this is the console output for the error:
Traceback (most recent call last):
File "<input>", line 1, in <module>
File "C:\Python27\lib\site-packages\neo4django-0.1.8-py2.7.egg\neo4django\db\models\manager.py", line 43, in create
return self.get_query_set().create(**kwargs)
File "C:\Python27\lib\site-packages\neo4django-0.1.8-py2.7.egg\neo4django\db\models\query.py", line 1307, in create
return super(NodeQuerySet, self).create(**kwargs)
File "C:\Python27\lib\site-packages\django-1.5.8-py2.7.egg\django\db\models\query.py", line 416, in create
obj.save(force_insert=True, using=self.db)
File "C:\Python27\lib\site-packages\neo4django-0.1.8-py2.7.egg\neo4django\db\models\base.py", line 325, in save
return super(NodeModel, self).save(using=using, **kwargs)
File "C:\Python27\lib\site-packages\django-1.5.8-py2.7.egg\django\db\models\base.py", line 546, in save
force_update=force_update, update_fields=update_fields)
File "C:\Python27\lib\site-packages\neo4django-0.1.8-py2.7.egg\neo4django\db\models\base.py", line 341, in save_base
self._save_neo4j_node(using)
File "<string>", line 2, in _save_neo4j_node
File "C:\Python27\lib\site-packages\neo4django-0.1.8-py2.7.egg\neo4django\db\models\base.py", line 98, in trans_method
ret = func(*args, **kw)
File "C:\Python27\lib\site-packages\neo4django-0.1.8-py2.7.egg\neo4django\db\models\base.py", line 369, in _save_neo4j_node
typesToIndex=type_names_to_index)
File "C:\Python27\lib\site-packages\neo4django-0.1.8-py2.7.egg\neo4django\neo4jclient.py", line 179, in gremlin_tx
return self.gremlin(script, tx=True, **params)
File "C:\Python27\lib\site-packages\neo4django-0.1.8-py2.7.egg\neo4django\neo4jclient.py", line 127, in gremlin
ext = self.extensions.GremlinPlugin
File "C:\Python27\lib\site-packages\neo4jrestclient\client.py", line 2176, in __getattr__
self._dict[attr] = ExtensionModule(self._extensions[attr], self._auth)
KeyError: 'GremlinPlugin'
It seems that the Neo4j Django driver depends on the Gremlin plugin on the Neo4j server. Starting with Neo4j 2.0, Gremlin has been removed from the distribution but is still available as a contribution package, see the instructions there.