Methods
C
P
Included Modules
Instance Public methods
column(name, type = nil, options = {})
# File activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb, line 377
def column(name, type = nil, options = {})
  super
  column = self[name]
  column.array = options[:array]

  self
end
primary_key(name, type = :primary_key, options = {})

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-osspextension, which MUST be enabled on your databse. To enable the uuid-osspextension, you can use the enable_extensionmethod in your migrations To use a UUID primary key without uuid-osspenabled, you can set the :defaultoption 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-osspor 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_savecallback, for instance.

# File activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb, line 370
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