before_action in bulk_create

I'm implementing some logic that would bulk_destroy existing records and bulk_create in a transaction

  create :replace_signatures do
      accept :*

      change relate_actor(:user)

      change fn changeset, context ->
        changeset
        |> Ash.Changeset.before_action(fn changeset ->
          Emails.EmailSignature.list_signatures!(
            actor: context.actor,
            tenant: context.tenant
          )
          |> Ash.bulk_destroy!(:destroy, %{}, tenant: context.tenant)

          changeset
        end)
      end
    end
  end

  create :replace_signatures do
      accept :*

      change relate_actor(:user)

      change fn changeset, context ->
        changeset
        |> Ash.Changeset.before_action(fn changeset ->
          Emails.EmailSignature.list_signatures!(
            actor: context.actor,
            tenant: context.tenant
          )
          |> Ash.bulk_destroy!(:destroy, %{}, tenant: context.tenant)

          changeset
        end)
      end
    end
  end

and then

  Ash.bulk_create(new_signatures, EmailSignature, :replace_signatures,
          actor: %{id: user.id},
          tenant: org.id,
          return_records?: true,
          assume_casted?: true
        )

  Ash.bulk_create(new_signatures, EmailSignature, :replace_signatures,
          actor: %{id: user.id},
          tenant: org.id,
          return_records?: true,
          assume_casted?: true
        )

but the before_action gets called before every batch, what's the idiomatic way to achieve this behavior and having the before_action running only once in transaction? Thanks

4 Replies

ZachDaniel•6mo ago

When you say before every batch do you mean for each record? You can define a change module and implement the batch callbacks to run code before the entire batch IIRC this is covered in the multi step actions guide

Elixord•6mo ago

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Searched ash-3.5.15 for multi-step-actions

ash-3.5.15 | extras

Multi-Step Actions

Marco Dell'OlioOP•6mo ago

would that previous change in transaction?

ZachDaniel•6mo ago

Yes, before_batch is in the same transaction as the batch

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before_action in bulk_create

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