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22 lines
586 B
Elixir
22 lines
586 B
Elixir
defmodule AshStateMachine.BuiltinChanges.NextState do
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@moduledoc false
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use Ash.Resource.Change
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def change(changeset, _opts, _) do
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changeset.data
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|> AshStateMachine.possible_next_states(changeset.action.name)
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|> case do
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[to] ->
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AshStateMachine.transition_state(changeset, to)
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[] ->
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Ash.Changeset.add_error(changeset, "Cannot determine next state: no next state available")
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_ ->
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Ash.Changeset.add_error(
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changeset,
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"Cannot determine next state: multiple next states available"
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)
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end
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end
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end
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