Closed n1207n closed 7 years ago
Thanks for submitting the issue. I'll try to upgrade to the latest cassandra-driver soon.
Also having this problem; FYI it is discussed here: https://datastax-oss.atlassian.net/browse/PYTHON-656 3.7.1 has the workaround.
Notice that I have said that my environment has cassandra-driver==3.7.1.
Cython issue is gone, but now django-cassandra-engine is not compatible with new cassandra-driver.
It's weird... Now django-cassandra-engine works again when I changed back to old pip dependencies.
It seems somehow my docker container is now using the last working Cython version. But please keep looking into this issue. cassandra-driver==3.7.1 may still conflict with django-cassandra-engine. I just wanted to make sure if this can be an issue for other people. That's all ;)
root@b7a273a98e1a:/code# pip freeze cassandra-driver==3.6.0 Django==1.9.9 django-allauth==0.27.0 django-cassandra-engine==0.11.1 django-cors-headers==1.1.0 django-debug-toolbar==1.5 django-rest-auth==0.8.1 djangorestframework==3.4.6 ecdsa==0.13 Fabric==1.12.0 futures==3.0.5 oauthlib==2.0.0 paramiko==1.17.2 pbr==1.10.0 psycopg2==2.6.2 pycrypto==2.6.1 python-openid==2.2.5 requests==2.11.1 requests-oauthlib==0.7.0 six==1.10.0 sqlparse==0.2.2 stevedore==1.17.1 virtualenv==15.0.2 virtualenv-clone==0.2.6 virtualenvwrapper==4.7.2
Also based on what I've seen from my pip freeze command, Cython is not getting installed when installing cassandra-driver. I can only speculate that cassandra-driver is compiled without Cython extension or is compiled with Cython temporarily and gone.
If anyone else has some insights or similar errors, feel free to discuss :D
Could you guys try now with current master?
Hi @r4fek, I'm reloading the pip requirement with your github url instead of PyPi now. I'll get back to you once it's done.
@r4fek I'm glad to confirm your fix is working!!!! Thanks for your attention and effort!
I'm glad to hear that. I'll release corrected version soon.
this is happening again with these versions. anyone faced this issue and resolved it ?
cassandra-driver==3.24.0
Django==2.2
django-cassandra-engine==1.6.1
when starting the all and trying to get queryset
app_container | Traceback (most recent call last):
app_container | File "/usr/local/lib/python3.8/site-packages/django/core/handlers/exception.py", line 34, in inner
app_container | response = get_response(request)
app_container | File "/usr/local/lib/python3.8/site-packages/django/core/handlers/base.py", line 115, in _get_response
app_container | response = self.process_exception_by_middleware(e, request)
app_container | File "/usr/local/lib/python3.8/site-packages/django/core/handlers/base.py", line 113, in _get_response
app_container | response = wrapped_callback(request, *callback_args, **callback_kwargs)
app_container | File "/app/app/views.py", line 14, in query_view
app_container | test_text = str(list(Storage_Keys_DCDF_GB.objects.all()))
app_container | File "/usr/local/lib/python3.8/site-packages/cassandra/cqlengine/query.py", line 437, in __len__
app_container | self._execute_query()
app_container | File "/usr/local/lib/python3.8/site-packages/cassandra/cqlengine/query.py", line 472, in _execute_query
app_container | self._result_generator = (i for i in self._execute(self._select_query()))
app_container | File "/usr/local/lib/python3.8/site-packages/cassandra/cqlengine/query.py", line 404, in _execute
app_container | result = _execute_statement(self.model, statement, self._consistency, self._timeout, connection=connection)
app_container | File "/usr/local/lib/python3.8/site-packages/cassandra/cqlengine/query.py", line 1531, in _execute_statement
app_container | return conn.execute(s, params, timeout=timeout, connection=connection)
app_container | File "/usr/local/lib/python3.8/site-packages/cassandra/cqlengine/connection.py", line 331, in execute
app_container | conn = get_connection(connection)
app_container | File "/usr/local/lib/python3.8/site-packages/cassandra/cqlengine/connection.py", line 241, in get_connection
app_container | raise CQLEngineException("Connection name '{0}' doesn't exist in the registry.".format(name))
app_container | cassandra.cqlengine.CQLEngineException: Connection name '<object object at 0x7f88d52eaed0>' doesn't exist in the registry.
+1 i'm witnessing the same exact scenario as @bicepjai has described
Im also having this issue on python3.8
Im also having this issue on python3.8
Can i see a copy of your database settings property? I had this issue, but when i put in the right host parameter it worked
Hi i am trying to connect to cassandra using ORMs but it is giving me this error and i am using cassandra version cassandra-driver==3.24.0 and i am getting this error cassandra.cqlengine.CQLEngineException: Connection name '<object object at 0x000001E8B172B780>' doesn't exist in the registry.
Hi! I'm experiencing an issue where django-cassandra-engine stops working due to new Cython version not being compatible with cassandra-driver python package. I looked around the web a bit, and it suggests to me that Cython version needs to be 0.24.1, as Cython 0.25 breaks the cassandra-driver.
Thankfully, Datastax team released a new version of cassandra-driver: 3.7.1, and Cython issue is gone but now I'm having a new issue.
All I can speculate from your code and cassandra-driver codebase is that your connection.get_session() no longer works as cassandra-driver's
_connections
dictionary is empty at the point of failure.I spent the whole day to burn and crash therefore, any solution or advice would be really appreciated ;)
The below is the traceback from my Docker environment.
Thanks!!!
Traceback (most recent call last): File "/code/manage.py", line 10, in
execute_from_command_line(sys.argv)
File "/usr/local/lib/python2.7/site-packages/django/core/management/init.py", line 353, in execute_from_command_line
utility.execute()
File "/usr/local/lib/python2.7/site-packages/django/core/management/init.py", line 327, in execute
django.setup()
File "/usr/local/lib/python2.7/site-packages/django/init.py", line 18, in setup
apps.populate(settings.INSTALLED_APPS)
File "/usr/local/lib/python2.7/site-packages/django/apps/registry.py", line 108, in populate
app_config.import_models(all_models)
File "/usr/local/lib/python2.7/site-packages/django/apps/config.py", line 202, in import_models
self.models_module = import_module(models_module_name)
File "/usr/local/lib/python2.7/importlib/init.py", line 37, in import_module
import(name)
File "/usr/local/lib/python2.7/site-packages/django_cassandra_engine/models/init.py", line 5, in
conn.connect()
File "/usr/local/lib/python2.7/site-packages/django_cassandra_engine/base/init.py", line 104, in connect
self.connection = CassandraConnection(settings)
File "/usr/local/lib/python2.7/site-packages/django_cassandra_engine/connection.py", line 58, in init**
self.setup()
File "/usr/local/lib/python2.7/site-packages/django_cassandra_engine/connection.py", line 62, in setup
self.session = connection.get_session()
File "/usr/local/lib/python2.7/site-packages/cassandra/cqlengine/connection.py", line 293, in get_session
conn = get_connection(connection)
File "/usr/local/lib/python2.7/site-packages/cassandra/cqlengine/connection.py", line 190, in get_connection
raise CQLEngineException("Connection name '{0}' doesn't exist in the registry.".format(name))
cassandra.cqlengine.CQLEngineException: Connection name '<object object at 0x7eff59dcc8e0>' doesn't exist in the registry.