Migrations DSL

The create_table method allow do pass a hash of options for:

• Clustering Order (clustering_order): A string such as 'a_decimal DESC'
• Compact Storage (compact_storage): Boolean, true or false
• Wait before GC (gc_grace_seconds): Default: 864000 [10 days]
• Others: See CQL Table Properties

Cassandra Migration will attempt to pass through the properties to the CREATE TABLE command.

Examples:

class WithClusteringOrderMigration < CassandraMigrations::Migration
  def up
    create_table :collection_lists, options: {
                                      clustering_order: 'a_decimal DESC',
                                      compact_storage: true,
                                      gc_grace_seconds: 43200
                                    } do |t|
      t.uuid :id, :primary_key => true
      t.decimal :a_decimal
    end
  end
end

Using Alternate/Additional Keyspaces

The using_keyspace method in a migration allows to execute that migration in the context of a specific keyspace:

class WithAlternateKeyspaceMigration < CassandraMigrations::Migration
  def up
    using_keyspace('alternative') do
      create_table :collection_lists, options: {compact_storage: true} do |t|
        t.uuid :id, :primary_key => true
        t.decimal :a_decimal
      end
    end
  end
end

If using multiple keyspaces, read about Using Multiple Keyspaces.