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@@ -105,9 +105,9 @@ depending on the purpose of these columns.
fields that Active Record will look for when you create associations between
your models.
* **Primary keys** - By default, Active Record will use an integer column named
- `id` as the table's primary key. When using [Active Record
- Migrations](active_record_migrations.html) to create your tables, this column will be
- automatically created.
+ `id` as the table's primary key (`bigint` for Postgres and MYSQL, `integer`
+ for SQLite). When using [Active Record Migrations](active_record_migrations.html)
+ to create your tables, this column will be automatically created.
There are also some optional column names that will add additional features
to Active Record instances: