# `MishkaCmsMigration.Resources.Changes.Reason`
[🔗](https://github.com/mishka-group/mishka_cms_migration/blob/v0.0.1/lib/mishka_cms_migration/resources/__changes/reason.ex#L5)

Keeps why a run failed: the action's `error` argument in words
(`MishkaCmsMigration.Report.reason/1`) as the run's `reason`. The error is what AshOban hands its
trigger's `on_error` action after the last attempt, or what Oban says of a job it discarded.

    update :fail do
      argument :error, :term, allow_nil?: false
      change MishkaCmsMigration.Resources.Changes.Reason
    end

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