AshWorkflow.Errors.UndoNotPermitted exception (AshWorkflow v0.6.0)

Raised (or returned) when undo is called on a record that cannot be rewound.

The reason field says which rule refused, so callers can branch without matching on message text:

:undo_not_enabled — the workflow has no undo block.
:no_history — the record's transition log has no state change to undo.
:not_undoable — the last state change came from a transition that is not marked undoable?: true. Automatic steps, timeouts, error paths and the initial row all land here.
:window_expired — the transition is older than the configured within.
:different_actor — same_actor? is set and the actor differs from the one recorded on the transition.
:no_actor — same_actor? is set and either the caller or the recorded transition has no actor.
:stale — the record moved on between reading the log and writing, so the row being undone is no longer the head.

Summary

Types

reason()

Functions

exception(args)

Create an Elixir.AshWorkflow.Errors.UndoNotPermitted without raising it.

Types

reason()

@type reason() ::
  :undo_not_enabled
  | :no_history
  | :not_undoable
  | :window_expired
  | :different_actor
  | :no_actor
  | :stale

Functions

exception(args)

@spec exception(opts :: Keyword.t()) :: %AshWorkflow.Errors.UndoNotPermitted{
  __exception__: true,
  bread_crumbs: term(),
  class: term(),
  from_state: term(),
  path: term(),
  reason: term(),
  resource: term(),
  splode: term(),
  stacktrace: term(),
  to_state: term(),
  vars: term()
}

Create an Elixir.AshWorkflow.Errors.UndoNotPermitted without raising it.

Keys

:reason
:resource
:from_state
:to_state