diff options
Diffstat (limited to 'activerecord')
| -rw-r--r-- | activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb | 20 |
1 files changed, 15 insertions, 5 deletions
diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb b/activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb index 5d689c2dc3..ae1ec3e2b7 100644 --- a/activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb +++ b/activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb @@ -12,11 +12,21 @@ module ActiveRecord # end # # By default, this will use the +gen_random_uuid()+ function from the - # +pgcrypto+ extension (only PostgreSQL >= 9.4), or +uuid_generate_v4()+ - # function from the +uuid-ossp+ extension. To enable the appropriate - # extension, which is a requirement, you can use the +enable_extension+ - # method in your migrations. To use a UUID primary key without any of - # of extensions, you can set the +:default+ option to +nil+: + # +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 |