Composite Key (clustering columns) is throwing error

[CaliBitcoins]

Hello, trying to get a Django/Cassandra project off the ground, but when I attempt to create some cql tables with composite keys in models.py I receive an error that instructs me to write an additional class. Has anyone else encountered this issue?

in models.py:
`from django.db import models
from cassandra.cqlengine import columns
from django_cassandra_engine.models import DjangoCassandraModel

class Article(DjangoCassandraModel):
slug = columns.Text(primary_key=True)
published = columns.DateTime(primary_key=True, clustering_order="DESC")
title = columns.Text(required=True)
author = columns.Text(required=True)
body = columns.Text(required=True)
thumb = columns.Bytes(required=False)`

when I python manage.py runserver OR sync_cassandra I get the following error:

`Traceback (most recent call last):
File "/usr/local/lib/python3.5/dist-packages/django_cassandra_engine/models/init.py", line 848, in _get_explicit_pk_column
pk_field = cls.Meta.get_pk_field
AttributeError: type object 'Article' has no attribute 'Meta'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "manage.py", line 15, in
execute_from_command_line(sys.argv)
File "/home/shine/.local/lib/python3.5/site-packages/django/core/management/init.py", line 371, in execute_from_command_line
utility.execute()
File "/home/shine/.local/lib/python3.5/site-packages/django/core/management/init.py", line 347, in execute
django.setup()
File "/home/shine/.local/lib/python3.5/site-packages/django/init.py", line 24, in setup
apps.populate(settings.INSTALLED_APPS)
File "/home/shine/.local/lib/python3.5/site-packages/django/apps/registry.py", line 112, in populate
app_config.import_models()
File "/home/shine/.local/lib/python3.5/site-packages/django/apps/config.py", line 198, in import_models
self.models_module = import_module(models_module_name)
File "/usr/lib/python3.5/importlib/init.py", line 126, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "", line 986, in _gcd_import
File "", line 969, in _find_and_load
File "", line 958, in _find_and_load_unlocked
File "", line 673, in _load_unlocked
File "", line 665, in exec_module
File "", line 222, in _call_with_frames_removed
File "/home/shine/cs/coinsector/articles/models.py", line 9, in
class Article(DjangoCassandraModel):
File "/usr/local/lib/python3.5/dist-packages/django_cassandra_engine/models/init.py", line 448, in new
name=name
File "/usr/local/lib/python3.5/dist-packages/django_cassandra_engine/models/init.py", line 505, in _add_django_meta_and_register_model
'_meta', DjangoCassandraOptions(meta, app_label, cls=new_class))
File "/usr/local/lib/python3.5/dist-packages/django_cassandra_engine/models/init.py", line 60, in init
self.setup_pk()
File "/usr/local/lib/python3.5/dist-packages/django_cassandra_engine/models/init.py", line 78, in setup_pk
self.pk = self.model_inst._get_explicit_pk_column()
File "/usr/local/lib/python3.5/dist-packages/django_cassandra_engine/models/init.py", line 850, in _get_explicit_pk_column
raise RuntimeError(PK_META_MISSING_HELP.format(cls))
RuntimeError:
On Django Cassandra Models with more than one primary_key field,
The model <class 'articles.models.Article'> must specify class Meta attribute 'get_pk_field'.
E.g.
class Meta:
get_pk_field='id'
So that Django knows which primary key field to use in queryies such as Model.objects.get(pk=123)
`
Any assistance would be very much appreciated! Thanks!

[bicepjai]

Did you get a solution for this ?

[caniko]

This is also a little counterintuitive, considering that Cassandra should accept multiple primary keys. This be solved intrinsically, right?