AF
Ash Framework•4mo ago
Joan Gavelán

Guidance on Generators

Need to implement a generator for a resource action that makes use of after_action hooks (organization > establishment > establishment_user) This is my chain of actions: 
# organization.ex
create :create_organization do
  argument :establishment, :map, allow_nil?: false

  change relate_actor(:owner)

  change after_action(fn changeset, org, context ->
           case Lamashka.Establishments.create_establishment(
                  changeset.arguments.establishment,
                  actor: context.actor,
                  tenant: org,
                  context: %{
                    accessing_from: %{
                      source: __MODULE__,
                      name: :establishments
                    }
                  }
                ) do
             {:ok, _establishment} -> {:ok, org}
             {:error, error} -> {:error, Ash.Error.set_path(error, :establishment)}
           end
         end)
end
# organization.ex
create :create_organization do
  argument :establishment, :map, allow_nil?: false

  change relate_actor(:owner)

  change after_action(fn changeset, org, context ->
           case Lamashka.Establishments.create_establishment(
                  changeset.arguments.establishment,
                  actor: context.actor,
                  tenant: org,
                  context: %{
                    accessing_from: %{
                      source: __MODULE__,
                      name: :establishments
                    }
                  }
                ) do
             {:ok, _establishment} -> {:ok, org}
             {:error, error} -> {:error, Ash.Error.set_path(error, :establishment)}
           end
         end)
end
# establishment.ex
create :create_establishment do
  change after_action(fn _changeset, est, context ->
           Lamashka.Establishments.add_establishment_user!(
             %{user_id: context.actor.id, role: :admin},
             tenant: est,
             context: %{
               accessing_from: %{
                 source: __MODULE__,
                 name: :establishment_users
               }
             }
           )

           {:ok, est}
         end)
end
# establishment.ex
create :create_establishment do
  change after_action(fn _changeset, est, context ->
           Lamashka.Establishments.add_establishment_user!(
             %{user_id: context.actor.id, role: :admin},
             tenant: est,
             context: %{
               accessing_from: %{
                 source: __MODULE__,
                 name: :establishment_users
               }
             }
           )

           {:ok, est}
         end)
end
# establishment_user.ex
create :add_establishment_user do
  accept [:user_id, :role]
end
# establishment_user.ex
create :add_establishment_user do
  accept [:user_id, :role]
end
This is what I'm trying so far without success 
  def org(opts \\ []) do
    changeset_generator(
      Organization,
      :create_organization,
      defaults: [
        name: "Organization",
        establishment: %{
          name: "Establishment",
          address: "Address"
        }
      ],
      overrides: opts,
      actor: opts[:actor]
    )
  end
  def org(opts \\ []) do
    changeset_generator(
      Organization,
      :create_organization,
      defaults: [
        name: "Organization",
        establishment: %{
          name: "Establishment",
          address: "Address"
        }
      ],
      overrides: opts,
      actor: opts[:actor]
    )
  end
 Invalid Error
   * Invalid value provided for role: does not exist.
 Invalid Error
   * Invalid value provided for role: does not exist.
3 Replies
Joan Gavelán
Joan GavelánOP•4mo ago
Mmm I just run it on IEX and the generator seems to be working, it is just failing on tests 
 1) test require_tenant/2 loads tenant from session (LamashkaWeb.TenantAuthTest)
     test/lamashka_web/tenant_auth_test.exs:9
     ** (Ash.Error.Invalid) 
     Bread Crumbs:
       > Error returned from: Lamashka.Organizations.Organization.create_organization

     Invalid Error

     * Invalid value provided for role: does not exist.

       (ash 3.5.25) lib/ash/error/changes/invalid_attribute.ex:4: Ash.Error.Changes.InvalidAttribute."exception (overridable 2)"/1
       (elixir 1.18.3) lib/enum.ex:1714: Enum."-map/2-lists^map/1-1-"/2
       (ash_postgres 2.6.8) lib/data_layer.ex:2371: AshPostgres.DataLayer.handle_raised_error/4
       (ash_postgres 2.6.8) lib/data_layer.ex:2169: AshPostgres.DataLayer.create/2
 1) test require_tenant/2 loads tenant from session (LamashkaWeb.TenantAuthTest)
     test/lamashka_web/tenant_auth_test.exs:9
     ** (Ash.Error.Invalid) 
     Bread Crumbs:
       > Error returned from: Lamashka.Organizations.Organization.create_organization

     Invalid Error

     * Invalid value provided for role: does not exist.

       (ash 3.5.25) lib/ash/error/changes/invalid_attribute.ex:4: Ash.Error.Changes.InvalidAttribute."exception (overridable 2)"/1
       (elixir 1.18.3) lib/enum.ex:1714: Enum."-map/2-lists^map/1-1-"/2
       (ash_postgres 2.6.8) lib/data_layer.ex:2371: AshPostgres.DataLayer.handle_raised_error/4
       (ash_postgres 2.6.8) lib/data_layer.ex:2169: AshPostgres.DataLayer.create/2
What could be the reason?
ZachDaniel
ZachDaniel•4mo ago
You may need to set a nil value for that argument it will generate random inputs otherwise i.e defaults: [arg: nil]
Joan Gavelán
Joan GavelánOP•4mo ago
The role isn't passed as an argument, is manually being set on the create_establishment action 
create :create_establishment do
  change after_action(fn _changeset, est, context ->
           Lamashka.Establishments.add_establishment_user!(
             %{user_id: context.actor.id, role: :admin}, # here
             tenant: est,
             context: %{
               accessing_from: %{
                 source: __MODULE__,
                 name: :establishment_users
               }
             }
           )

           {:ok, est}
         end)
end
create :create_establishment do
  change after_action(fn _changeset, est, context ->
           Lamashka.Establishments.add_establishment_user!(
             %{user_id: context.actor.id, role: :admin}, # here
             tenant: est,
             context: %{
               accessing_from: %{
                 source: __MODULE__,
                 name: :establishment_users
               }
             }
           )

           {:ok, est}
         end)
end
I'm using an enum table for roles btw, could that be the reason? Maybe the generator does not know of the records available in the role table? Yep, it wasn't a problem related to Ash but more about my lack of understanding of the testing environment, so sorry. Closing this.

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