Class: MsgpackMigrationHelper

Inherits:
Object
  • Object
show all
Defined in:
lib/dynflow/persistence_adapters/sequel_migrations/msgpack_migration_helper.rb

Instance Method Summary collapse

Constructor Details

#initialize(tables) ⇒ MsgpackMigrationHelper

Returns a new instance of MsgpackMigrationHelper.



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# File 'lib/dynflow/persistence_adapters/sequel_migrations/msgpack_migration_helper.rb', line 7

def initialize(tables)
  @tables = tables
end

Instance Method Details

#down(migration) ⇒ Object 



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# File 'lib/dynflow/persistence_adapters/sequel_migrations/msgpack_migration_helper.rb', line 21

def down(migration)
  @tables.each do |table, columns|
    new_columns = columns.map { |c| c + '_text' }
    migrate_table migration, table, columns, new_columns, String do |data|
      JSON.dump(MessagePack.unpack(data))
    end
  end
end

#up(migration) ⇒ Object 



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# File 'lib/dynflow/persistence_adapters/sequel_migrations/msgpack_migration_helper.rb', line 11

def up(migration)
  @tables.each do |table, columns|
    new_columns = columns.map { |c| "#{c}_blob" }

    migrate_table migration, table, columns, new_columns, File do |data|
      ::Sequel.blob(MessagePack.pack(JSON.parse(data)))
    end
  end
end