Module: Cassie::Schema

Extended by:

Configuration, Definition, Versioning

Defined in:

lib/cassie/schema.rb,
lib/cassie/schema/queries.rb,
lib/cassie/schema/version.rb,
lib/cassie/schema/migrator.rb,
lib/cassie/schema/migration.rb,
lib/cassie/schema/definition.rb,
lib/cassie/schema/versioning.rb,
lib/cassie/schema/apply_command.rb,
lib/cassie/schema/configuration.rb,
lib/cassie/schema/migration/dsl.rb,
lib/cassie/schema/schema_dumper.rb,
lib/cassie/schema/schema_loader.rb,
lib/cassie/schema/definition/dsl.rb,
lib/cassie/schema/version_loader.rb,
lib/cassie/schema/version_writer.rb,
lib/cassie/schema/rollback_command.rb,
lib/cassie/schema/structure_dumper.rb,
lib/cassie/schema/structure_loader.rb,
lib/cassie/schema/version_file_loader.rb,
lib/cassie/schema/version_object_loader.rb,
lib/cassie/schema/migration/cassandra_support.rb,
lib/cassie/schema/queries/drop_keyspace_query.rb,
lib/cassie/schema/queries/delete_version_query.rb,
lib/cassie/schema/queries/insert_version_query.rb,
lib/cassie/schema/cassandra_migrations/importer.rb,
lib/cassie/schema/queries/create_keyspace_query.rb,
lib/cassie/schema/queries/select_versions_query.rb,
lib/cassie/schema/cassandra_migrations/migration_file.rb,
lib/cassie/schema/queries/create_versions_table_query.rb

Overview

Contains interface and components for managing Cassandra schema using semantically versioned, incremental migration files.

• Versioned migration files are stored in-repo in ruby files defining up and down mutation methods.

• Data about what migrations have been applied is stored in Cassandra persistence.

• The schema state is stored in an in-repo schema file that contains the CQL required to recreate the current schema state/version from scratch.

• Various cassie executable commands provide an interface to manage migrations and versioning.

Run cassie –help to see a list of commands and their descriptions for managing the schema through versioned migrations.

See Also:

• Schema README for information on task usage and the migration DSL.

Defined Under Namespace

Modules: CassandraMigrations, Configuration, Definition, Queries, Versioning Classes: AlreadyInitiailizedError, ApplyCommand, CreateKeyspaceQuery, CreateVersionsTableQuery, DeleteVersionQuery, DropKeyspaceQuery, InsertVersionQuery, Migration, Migrator, RollbackCommand, SchemaDumper, SchemaLoader, SelectVersionsQuery, StructureDumper, StructureLoader, UninitializedError, Version, VersionFileLoader, VersionLoader, VersionObjectLoader, VersionWriter

Instance Attribute Summary

Attributes included from Configuration

#schema_keyspace, #versions_table

Class Method Summary

• .application ⇒ String

  The application namespace.

• .application=(app_name) ⇒ Object

Methods included from Configuration

paths

Methods included from Versioning

applied_versions, forget_version, initialize_versioning, local_versions, migration_files, next_version, record_version, version

Methods included from Definition

define

Class Method Details

.application ⇒ String

The application namespace. Only applicaple When cassie manages multiple application schemas within the same cluster.

# File 'lib/cassie/schema.rb', line 27

def self.application
  return @application if defined?(@application)
  "global"
end

.application=(app_name) ⇒ Object

# File 'lib/cassie/schema.rb', line 32

def self.application=(app_name)
  @application = app_name
end