# `MishkaCmsCore.Runtime.Resources.Calculations.VersionPreview`
[🔗](https://github.com/mishka-group/mishka_cms_core/blob/v0.0.1/lib/mishka_cms_core/runtime/resources/__calculations/version_preview.ex#L5)

What a record said in one of its own versions, for a preview before a restore.

The `:version_id` argument must name a version of THE RECORD being loaded; any other version — of
another record, or of another site's — answers `nil`, the same as a version that does not exist.
The record itself was read as the caller, so the version is read as the system once it is known to
be the record's own.

## Options

  * `:version` — the resource's AshPaperTrail version resource. Required. It must have a
    `:get_any` read.

## Usage

    calculate :version_preview,
              :map,
              {MishkaCmsCore.Runtime.Resources.Calculations.VersionPreview,
               version: MishkaCmsCore.Runtime.Layout.Version} do
      argument :version_id, :uuid, allow_nil?: false
    end

# `describe`

# `has_calculate?`

# `has_expression?`

# `load`

# `strict_loads?`

---

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