ripozo-cassandra

ripozo-cassandra is a ripozo-extension that provides a Manager that integrates cqlengine (and thereby Cassandra) with ripozo. It provides convience functions for generating resources. In particular it focues on creating shortcuts for CRUD+L type operations. It fully implements the BaseManager class that is provided in the ripozo package.

Example

This is the minimal example of creating ripozo managers with ripozo-cassandra and integrating them with a resource. As you can see in the example, there are only three functional lines of code.

from cqlengine.models import Model
from cqlengine import columns, connection
from cqlengine.management import create_keyspace, sync_table, delete_keyspace

from ripozo_cassandra import CQLManager

from uuid import uuid4

# Define your model
class Person(Model):
    id = columns.UUID(primary_key=True, default=lambda:uuid4())
    first_name = columns.Text()
    last_name = columns.Text()

# Setup cqlengine and sync the person table
keyspace_name = 'mykeyspace'
connection.setup(['192.168.56.102'], keyspace_name)
create_keyspace(keyspace_name)
sync_table(Person)

# This is where you define your manager
class PersonManageR(CQLManager):
    model = Person  # Assign the cqlengin model to the manager
    fields = ('id', 'first_name', 'last_name',) # Specify the fields to use for this manager

# This is the ripozo specific part.
# This creates a resource class that can be given
# to a dispatcher (e.g. the flask-ripozo package's FlaskDispatcher)
class PersonResource(ResourceBase):
    manager = PersonManager
    pks = ['id']

    # A retrieval method that will operate on the '/api/person' route
    # It retrieves the id, first_name, and last_name properties
    @apimethod(methods=['GET'])
    def get_person(cls, request):
        properties = self.manager.retrieve(request.url_params)
        return cls(properties=properties)