# File lib/active_record/connection_adapters/redshift_adapter.rb, line 361 def primary_key(name, type = :primary_key, options = {}) return super unless type == :uuid options[:default] = options.fetch(:default, 'uuid_generate_v4()') options[:primary_key] = true column name, type, options end
class ActiveRecord::ConnectionAdapters::RedshiftAdapter::TableDefinition
Public Instance Methods
# File lib/active_record/connection_adapters/redshift_adapter.rb, line 368 def column(name, type = nil, options = {}) super column = self[name] column.array = options[:array] self end
Defines the primary key field. Use of the native PostgreSQL UUID type is supported, and can be used by defining your tables as such:
create_table :stuffs, id: :uuid do |t| t.string :content t.timestamps end
By default, this will use the +uuid_generate_v4()+ function from the uuid-ossp
extension, which MUST be enabled on your databse. To enable the uuid-ossp
extension, you can use the enable_extension
method in your migrations To use a UUID primary key without uuid-ossp
enabled, you can set the :default
option to nil:
create_table :stuffs, id: false do |t| t.primary_key :id, :uuid, default: nil t.uuid :foo_id t.timestamps end
You may also pass a different UUID generation function from uuid-ossp
or another library.
Note that setting the UUID primary key default value to nil
will require you to assure that you always provide a UUID value before saving a record (as primary keys cannot be nil). This might be done via the SecureRandom.uuid method and a before_save
callback, for instance.
# File lib/active_record/connection_adapters/redshift_adapter.rb, line 376 def xml(options = {}) column(args[0], :text, options) end
Private Instance Methods
# File lib/active_record/connection_adapters/redshift_adapter.rb, line 382 def create_column_definition(name, type) ColumnDefinition.new name, type end