# `AshVersioned.Resource`

Configures a resource for versioning. The source table gets a stable resource
identifier, a version number, and a flag marking a row as the latest version, and
mutations append new rows instead of updating in place.

Versioned resources must already have the following fields declared in `attributes`.

- A surrogate primary key (`uuid_v7_primary_key`, `integer_primary_key`, or one already
  on a ported table). Composite keys are not supported.
- Create and update timestamps (usually `:inserted_at` and `:updated_at`) with any
  non-null datetime-family attribute.

# `versioning`
*macro* 

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*Consult [api-reference.md](api-reference.md) for complete listing*