module ActiveRecord::ConnectionAdapters::PostgreSQL::ColumnMethods

Public Instance Methods

bigserial(*names, **options) Show source

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 60

bit(*names, **options) Show source

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 64

bit_varying(*names, **options) Show source

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 68

box(*names, **options) Show source

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 140

cidr(*names, **options) Show source

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 72

circle(*names, **options) Show source

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 152

citext(*names, **options) Show source

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 76

daterange(*names, **options) Show source

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 80

hstore(*names, **options) Show source

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 84

inet(*names, **options) Show source

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 88

int4range(*names, **options) Show source

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 96

int8range(*names, **options) Show source

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 100

interval(*names, **options) Show source

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 92

jsonb(*names, **options) Show source

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 104

line(*names, **options) Show source

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 132

lseg(*names, **options) Show source

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 136

ltree(*names, **options) Show source

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 108

macaddr(*names, **options) Show source

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 112

money(*names, **options) Show source

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 116

numrange(*names, **options) Show source

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 120

oid(*names, **options) Show source

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 124

path(*names, **options) Show source

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 144

point(*names, **options) Show source

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 128

polygon(*names, **options) Show source

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 148

primary_key(name, type = :primary_key, **options) Show source

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 48
def primary_key(name, type = :primary_key, **options)
  if type == :uuid
    options[:default] = options.fetch(:default, "gen_random_uuid()")
  end

  super
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 gen_random_uuid() function from the pgcrypto extension. As that extension is only available in PostgreSQL 9.4+, for earlier versions an explicit default can be set to use uuid_generate_v4() from the uuid-ossp extension instead:

create_table :stuffs, id: false do |t|
  t.primary_key :id, :uuid, default: "uuid_generate_v4()"
  t.uuid :foo_id
  t.timestamps
end

To enable the appropriate extension, which is a requirement, use the enable_extension method in your migrations.

To use a UUID primary key without any of the extensions, 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.

Calls superclass method

serial(*names, **options) Show source

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 156

tsrange(*names, **options) Show source

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 160

tstzrange(*names, **options) Show source

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 164

tsvector(*names, **options) Show source

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 168

uuid(*names, **options) Show source

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 172

xml(*names, **options) Show source

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 176
included do
  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
end