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Rails supports but does not recommend non-PK `id` column

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Nikita Vasilevsky 2023-09-11 14:28:14 +00:00
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guides/source/active_record_basics.md
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@ -212,7 +212,11 @@ class Product < ApplicationRecord
end
```
NOTE: **Active Record does not support using non-primary key columns named `id`.**
NOTE: **Active Record does not recommend using non-primary key columns named `id`.**
Using a column named `id` which is not a single-column primary key complicates the access to the column value.
The application will have to use the [`id_value`][] alias attribute to access the value of the non-PK `id` column.
[`id_value`]: https://api.rubyonrails.org/classes/ActiveRecord/ModelSchema.html#method-i-id_value
NOTE: If you try to create a column named `id` which is not the primary key,
Rails will throw an error during migrations such as: