Develop Reference

Does neo4j desktop include a usable neo4j database

I have installed neo4j desktop and I am able to use neo4j database from it. The problem is when I try to connect to neo4j database from a Django project.
I have configured my settings.py with config.DATABASE_URL = 'bolt://neo4j:neo4j#localhost:7687', but when I run neomodel_install-labels, I get this error:
Connecting to bolt://neo4j:neo4j#localhost:7687
Traceback (most recent call last):
File "/Users/hugovillalobos/Documents/Code/AttractoraProject/AttractoraVenv/lib/python3.6/site-packages/neo4j/bolt/connection.py",
line 578, in _connect
s.connect(resolved_address)
ConnectionRefusedError: [Errno 61] Connection refused
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/Users/hugovillalobos/Documents/Code/AttractoraProject/AttractoraVenv/bin/neomodel_install_labels", line 67, in <module>
main()
File "/Users/hugovillalobos/Documents/Code/AttractoraProject/AttractoraVenv/bin/neomodel_install_labels", line 62, in main
db.set_connection(bolt_url)
File "/Users/hugovillalobos/Documents/Code/AttractoraProject/AttractoraVenv/lib/python3.6/site-packages/neomodel/util.py", line 65,
in set_connection
max_pool_size=config.MAX_POOL_SIZE)
File "/Users/hugovillalobos/Documents/Code/AttractoraProject/AttractoraVenv/lib/python3.6/site-packages/neo4j/v1/api.py", line 94,
in driver
return Driver(uri, **config)
File "/Users/hugovillalobos/Documents/Code/AttractoraProject/AttractoraVenv/lib/python3.6/site-packages/neo4j/v1/api.py", line 133,
in __new__
return subclass(uri, **config)
File "/Users/hugovillalobos/Documents/Code/AttractoraProject/AttractoraVenv/lib/python3.6/site-packages/neo4j/v1/direct.py", line 7
3, in __new__
pool.release(pool.acquire())
File "/Users/hugovillalobos/Documents/Code/AttractoraProject/AttractoraVenv/lib/python3.6/site-packages/neo4j/v1/direct.py", line 4
4, in acquire
return self.acquire_direct(self.address)
File "/Users/hugovillalobos/Documents/Code/AttractoraProject/AttractoraVenv/lib/python3.6/site-packages/neo4j/bolt/connection.py",
line 453, in acquire_direct
connection = self.connector(address, self.connection_error_handler)
File "/Users/hugovillalobos/Documents/Code/AttractoraProject/AttractoraVenv/lib/python3.6/site-packages/neo4j/v1/direct.py", line 7
0, in connector
return connect(address, security_plan.ssl_context, error_handler, **config)
File "/Users/hugovillalobos/Documents/Code/AttractoraProject/AttractoraVenv/lib/python3.6/site-packages/neo4j/bolt/connection.py",
line 707, in connect
raise last_error
File "/Users/hugovillalobos/Documents/Code/AttractoraProject/AttractoraVenv/lib/python3.6/site-packages/neo4j/bolt/connection.py",
line 697, in connect
s = _connect(resolved_address, **config)
File "/Users/hugovillalobos/Documents/Code/AttractoraProject/AttractoraVenv/lib/python3.6/site-packages/neo4j/bolt/connection.py",
line 587, in _connect
raise ServiceUnavailable("Failed to establish connection to {!r} (reason {})".format(resolved_address, error.errno))
neo4j.exceptions.ServiceUnavailable: Failed to establish connection to ('::1', 7687, 0, 0) (reason 61)
I know the database is running because I can connect from neo4j desktop, and I have installed neo4j-driver and neomodel. I don't know what I am missing.

Ok, I don't know if this apply to any case, and I don't know the reason for it, but I found that it was a matter of spacial characters in the password. I set my password with an exclamation character, and when I was trying to connect, it failed. I changed the password for the user in Neo4j removing the exclamation character and Bingo! I got a connection. Can anybody tell my why this happens?

Python code for ldapsearch

I have a script:
ldapsearch -xLL -h 10.4.113.46 -D 'E900000#corp.privatedev' -W -b 'dc=corp,dc=privatedev' '(cn=lc_proxy_pentest)'
It runs well.
I programme with python to make the same query:
from ldap3 import Server, Connection, ALL
....
server = Server('10.4.113.46', get_info=ALL)
conn = Connection(server, 'uid=E900000#corp.privatedev,cn=lc_proxy_pentest,dc=corp,dc=privatedev', 'PaSsWoRd', auto_bind=True)
The error shows:
Traceback (most recent call last): File "<input>", line 1, in <module>
File "C:\Users\E900000\Python\lib\site-packages\ldap3\core\connection.py", line 278, in __init__
self.bind(read_server_info=True)
File "C:\Users\E900000\Python\lib\site-packages\ldap3\core\connection.py", line 427, in bind
response = self.post_send_single_response(self.send('bindRequest', request, controls))
File "C:\Users\E900000\Python\lib\site-packages\ldap3\strategy\sync.py", line 122, in post_send_single_response
responses, result = self.get_response(message_id)
File "C:\Users\E900000\Python\lib\site-packages\ldap3\strategy\base.py", line 298, in get_response
responses = self._get_response(message_id)
File "C:\Users\E900000\Python\lib\site-packages\ldap3\strategy\sync.py", line 168, in _get_response
dict_response = self.decode_response(ldap_resp)
File "C:\Users\E900000\Python\lib\site-packages\ldap3\strategy\base.py", line 403, in decode_response
result = bind_response_to_dict(component)
File "C:\Users\E900000\Python\lib\site-packages\ldap3\operation\bind.py", line 119, in bind_response_to_dict
'saslCreds': bytes(response['serverSaslCreds']) if response['serverSaslCreds'] is not None else None}
File "C:\Users\E900000\Python\lib\site-packages\pyasn1\type\univ.py", line 984, in __bytes__
return bytes(self._value) TypeError: cannot convert 'NoValue' object to bytes
If I programme just
server = Server('10.4.113.46')
conn = Connection(server)
conn.bind()
The third line brings the same error.
What's wrong?

I doubt that E900000#corp.privatedev corresponds to uid=E900000#corp.privatedev,cn=lc_proxy_pentest,dc=corp,dc=privatedev
I am assuming you are using Active Directory (based on E900000#corp.privatedev).
Try using dsquery to Determine the FDN for the user.

The reason of the failed connection can be refered https://github.com/etingof/pyasn1/issues/52.
But after I modify the library and enable a successful connection, the ldapsearch still doesn‘t work.

Neo4j Protocol Error: Server closed connection

I am new to neo4j world. I have successfully used it on my macbook. Now I am deploying it on a remote Linux machine with the same setup. But I keep getting this Protocol error. What caused this issue? How to fix this? I have been banging my head on this error for days.
Traceback (most recent call last):
File "/root/dev/knowledgeGraphH/knowledge/media_entity_mapper.py", line 31, in <module>
main()
File "/root/dev/knowledgeGraphH/knowledge/media_entity_mapper.py", line 28, in main
map_media_to_entities()
File "/root/dev/knowledgeGraphH/knowledge/media_entity_mapper.py", line 7, in map_media_to_entities
data_manager = DataManager()
File "/root/dev/knowledgeGraphH/knowledge/data_manager/data_manager.py", line 13, in __init__
self.graphDB = Neo4jManager()
File "/root/dev/knowledgeGraphH/knowledge/neo4j_manager.py", line 10, in __init__
self.session = self.driver.session()
File "/root/dev/knowledgeGraphH/env/lib/python2.7/site-packages/neo4j/v1/session.py", line 148, in session
session = Session(self)
File "/root/dev/knowledgeGraphH/env/lib/python2.7/site-packages/neo4j/v1/session.py", line 461, in __init__
self.connection = connect(driver.host, driver.port, driver.ssl_context, **driver.config)
File "/root/dev/knowledgeGraphH/env/lib/python2.7/site-packages/neo4j/v1/connection.py", line 465, in connect
return Connection(s, der_encoded_server_certificate=der_encoded_server_certificate, **config)
File "/root/dev/knowledgeGraphH/env/lib/python2.7/site-packages/neo4j/v1/connection.py", line 237, in __init__
self.fetch()
File "/root/dev/knowledgeGraphH/env/lib/python2.7/site-packages/neo4j/v1/connection.py", line 326, in fetch
self.acknowledge_failure()
File "/root/dev/knowledgeGraphH/env/lib/python2.7/site-packages/neo4j/v1/connection.py", line 273, in acknowledge_failure
fetch()
File "/root/dev/knowledgeGraphH/env/lib/python2.7/site-packages/neo4j/v1/connection.py", line 311, in fetch
raw.writelines(self.channel.chunk_reader())
File "/root/dev/knowledgeGraphH/env/lib/python2.7/site-packages/neo4j/v1/connection.py", line 169, in chunk_reader
chunk_header = self._recv(2)
File "/root/dev/knowledgeGraphH/env/lib/python2.7/site-packages/neo4j/v1/connection.py", line 152, in _recv
raise ProtocolError("Server closed connection")
neo4j.v1.exceptions.ProtocolError: Server closed connection

Seems to be port issue. Is the bolt port open or not? You have access to the port or not?
Check the output of the following command:
lsof -i tcp:7687
change the port number if you have changed bolt port address.

It turns out it was because I used the wrong credentials for this connection.

issues with OpenERP installation

I am installing openerp at my local server, I have installed it and its dependences but after finishing its installation when i run server 'openerp-server' and acces it using 0.0.0.0:8069/. I got the following error
OpenERP Server Error
Client Traceback (most recent call last):
File "/usr/local/lib/python2.7/dist-packages/openerp-7.0_20130211_002141-py2.7.egg/openerp/addons/web/http.py", line 195, in dispatch
response["result"] = method(self, **self.params)
File "/usr/local/lib/python2.7/dist-packages/openerp-7.0_20130211_002141-py2.7.egg/openerp/addons/web/controllers/main.py", line 709, in get_list
return db_list(req)
File "/usr/local/lib/python2.7/dist-packages/openerp-7.0_20130211_002141-py2.7.egg/openerp/addons/web/controllers/main.py", line 88, in db_list
dbs = proxy.list()
File "/usr/local/lib/python2.7/dist-packages/openerp-7.0_20130211_002141-py2.7.egg/openerp/addons/web/session.py", line 31, in proxy_method
result = self.session.send(self.service_name, method, *args)
File "/usr/local/lib/python2.7/dist-packages/openerp-7.0_20130211_002141-py2.7.egg/openerp/addons/web/session.py", line 104, in send
raise xmlrpclib.Fault(openerp.tools.ustr(e), formatted_info)
Server Traceback (most recent call last):
File "/usr/local/lib/python2.7/dist-packages/openerp-7.0_20130211_002141-py2.7.egg/openerp/addons/web/session.py", line 90, in send
return openerp.netsvc.dispatch_rpc(service_name, method, args)
File "/usr/local/lib/python2.7/dist-packages/openerp-7.0_20130211_002141-py2.7.egg/openerp/netsvc.py", line 295, in dispatch_rpc
result = ExportService.getService(service_name).dispatch(method, params)
File "/usr/local/lib/python2.7/dist-packages/openerp-7.0_20130211_002141-py2.7.egg/openerp/service/web_services.py", line 122, in dispatch
return fn(*params)
File "/usr/local/lib/python2.7/dist-packages/openerp-7.0_20130211_002141-py2.7.egg/openerp/service/web_services.py", line 351, in exp_list
cr = db.cursor()
File "/usr/local/lib/python2.7/dist-packages/openerp-7.0_20130211_002141-py2.7.egg/openerp/sql_db.py", line 477, in cursor
return Cursor(self._pool, self.dbname, serialized=serialized)
File "/usr/local/lib/python2.7/dist-packages/openerp-7.0_20130211_002141-py2.7.egg/openerp/sql_db.py", line 183, in __init__
self._cnx = pool.borrow(dsn(dbname))
File "/usr/local/lib/python2.7/dist-packages/openerp-7.0_20130211_002141-py2.7.egg/openerp/sql_db.py", line 378, in _locked
return fun(self, *args, **kwargs)
File "/usr/local/lib/python2.7/dist-packages/openerp-7.0_20130211_002141-py2.7.egg/openerp/sql_db.py", line 433, in borrow
result = psycopg2.connect(dsn=dsn, connection_factory=PsycoConnection)
File "/usr/lib/python2.7/dist-packages/psycopg2/__init__.py", line 179, in connect
connection_factory=connection_factory, async=async)
OperationalError: FATAL: role "ghrix" does not exist
I haven't recognize this error.
One more thing , I haven't edit OpenERP server configuration file . And if I have to edit this file then what are those changes.
Thanks.

This error indicates that OpenERP is trying to connect to the PostgreSQL database server using the "ghrix" user, which does not exist. This is probably the user under which you are starting the server.
If you have created a special database user for OpenERP you need to specify it on the command-line using --db_user=DB_USER (and in that case you probably also need --db_host=localhost and --db-password=YOUR_PASSWORD).
If you haven't created any database user yet, the easiest solution is probably to create one named ghrix, e.g.:
$ sudo su - postgres
$ createuser -s ghrix # -s to make a super-user that can create DBs
Note: Use ./openerp-server --help to see all possible startup parameters for the OpenERP server. You can also put the command-line options in a config file: just execute
$ ./openerp-server -s
and then edit the sample config file that is created in $HOME/.openerp_serverrc

Even though the question has been answered, the following is a concise tutorial on installing a production grade OpenERP Server, that also explains how to set up the database, manage access rights and configure your OpenERP installation:
http://www.theopensourcerer.com/2012/02/how-to-install-openerp-6-1-on-ubuntu-10-04-lts/

you should check two case
First case:
$ sudo su - postgres $ createuser -s ghrix
second case
fill the db user and db password in
/odoo/debian/odoo.conf
run odoo with this parameter
./odoo-bin -c /opt/odoo/debian/odoo.conf
If not resolved comment below i try to resolve it

MySQL 1045 exception

I use Django 1.3.1 & Python 2.7.2 and I'm trying to deploy a project locally with nginx.
Something wrong with manage.py after executing the first command. For example: the first command is:
$ python manage.py runfcgi host=127.0.0.1 port=7782
and it works correctly. But when I try to execute any command after that, like syncdb or anything else (runserver, validate, runfcgi, etc...), I get strange exceptions:
Traceback (most recent call last):
File "/usr/local/lib/python2.7/dist-packages/django/core/management/commands/runserver.py", line 88, in inner_run
self.validate(display_num_errors=True)
File "/usr/local/lib/python2.7/dist-packages/django/core/management/base.py", line 249, in validate
num_errors = get_validation_errors(s, app)
File "/usr/local/lib/python2.7/dist-packages/django/core/management/validation.py", line 102, in get_validation_errors
connection.validation.validate_field(e, opts, f)
File "/usr/local/lib/python2.7/dist-packages/django/db/backends/mysql/validation.py", line 14, in validate_field
db_version = self.connection.get_server_version()
File "/usr/local/lib/python2.7/dist-packages/django/db/backends/mysql/base.py", line 338, in get_server_version
self.cursor()
File "/usr/local/lib/python2.7/dist-packages/django/db/backends/__init__.py", line 250, in cursor
cursor = self.make_debug_cursor(self._cursor())
File "/usr/local/lib/python2.7/dist-packages/django/db/backends/mysql/base.py", line 322, in _cursor
self.connection = Database.connect(**kwargs)
File "/usr/lib/pymodules/python2.7/MySQLdb/__init__.py", line 81, in Connect
return Connection(*args, **kwargs)
File "/usr/lib/pymodules/python2.7/MySQLdb/connections.py", line 187, in __init__
super(Connection, self).__init__(*args, **kwargs2)
_mysql_exceptions.OperationalError: (1045, "Access denied for user 'root'#'localhost' (using password: NO)")
I don't know what the reason is. In settings.py all MySQL access parameters (user, pass, dbname & host) are written correctly (syncdb succeed).
Note: if I copy the project directory for example to "project2" and rename it to original "project", the problem disappears for the first manage.py command I exectue, after that, I see the exceptions again.
I have another django projects deployed in the same way, using same django & python, but they work without any problem.
Anybody knows what the problem is?

Is your other Django project is set up on the same server/computer?
If it is, check your commas when you giving your db credentials and compare with the one which is running.