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Merge pull request #34909 from davidalee/patch-2 

Specify the type for the auto-generated primary key
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Prem Sichanugrist 2019-01-10 10:55:37 +09:00 committed by GitHub
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guides/source/active_record_basics.md
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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: