gem 'cassandra_db'

db = CassandraDB.connect hosts: ['localhost'], port: 9042, keyspace: 'system'

db.keyspace # => :system

db.keyspaces # => [:system, :system_traces]

db.tables # => Array of table names in current keyspace

db.use_keyspace 'my_keyspace'
db.keyspace # => :my_keyspace

replication_opts = {
  class: 'SimpleStrategy',
  replication_factor: 1
}
db.create_keyspace :my_keyspace, replication: replication_opts, durable_writes: true

db.drop_keyspace :my_keyspace

dataset = db[table_name] # => CassandraDB::Dataset
dataset = db[table_name].where(field: 'value') # => CassandraDB::Dataset

dataset.count
dataset.each
dataset.map
dataset.all

dataset.insert id: 1, name: 'Name 1'

dataset.where(id: 1).update name: 'Name 2'

dataset.where(id: 1).delete