Module: ActiveRecord::ConnectionAdapters::PostgreSQL::ColumnMethods

Extended by:
ActiveSupport::Concern, ConnectionAdapters::ColumnMethods::ClassMethods
Included in:
Table, TableDefinition
Defined in:
activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb

Instance Method Summary collapse

Methods included from ActiveSupport::Concern

append_features, class_methods, extended, included, prepend_features, prepended

Instance Method Details

#bigserial ⇒ Object

:method: enum :call-seq: enum(*names, **options)



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# File 'activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb', line 173

define_column_methods :bigserial, :bit, :bit_varying, :cidr, :citext, :daterange,
:hstore, :inet, :interval, :int4range, :int8range, :jsonb, :ltree, :macaddr,
:money, :numrange, :oid, :point, :line, :lseg, :box, :path, :polygon, :circle,
:serial, :tsrange, :tstzrange, :tsvector, :uuid, :xml, :timestamptz, :enum

#primary_key(name, type = :primary_key, **options) ⇒ Object

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 gen_random_uuid() function.

To use a UUID primary key without any defaults, 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 custom stored procedure that returns a UUID or use a different UUID generation function from 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.



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# File 'activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb', line 37

def primary_key(name, type = :primary_key, **options)
  if type == :uuid
    options[:default] = options.fetch(:default, "gen_random_uuid()")
  end

  super
end