14 replies

Create action with multiple nested resources

This is the action to register an account. There are 3 resources at play. An account has many memberships and every membership belongs to a user. The membership resource is simply as has_and_belongs_to_many with a role on it.

When a new account is created, it should always create the account and membership for the owner/user. The user resource has an identity on email and is only created if the user doesn't already exist.

What happens is the membership fails to insert because the user_id is nil.

  actions do
    create :register do
      accept([:name, :slug])
      allow_nil_input([:slug])

      argument(:email, :string, allow_nil?: false)
      ...

      change(fn changeset, _context ->
        email = changeset |> Ash.Changeset.get_argument(:email)

        changeset
        |> Ash.Changeset.manage_relationship(
          :memberships,
          [%{role: "owner", user: %{email: email}}],
          type: :create
        )
      end)
    end
  end

  actions do
    create :register do
      accept([:name, :slug])
      allow_nil_input([:slug])

      argument(:email, :string, allow_nil?: false)
      ...

      change(fn changeset, _context ->
        email = changeset |> Ash.Changeset.get_argument(:email)

        changeset
        |> Ash.Changeset.manage_relationship(
          :memberships,
          [%{role: "owner", user: %{email: email}}],
          type: :create
        )
      end)
    end
  end

Ash Framework•3y ago•

14 replies

Robert Graff

Create action with multiple nested resources

  actions do
    create :register do
      accept([:name, :slug])
      allow_nil_input([:slug])

      argument(:email, :string, allow_nil?: false)
      ...

      change(fn changeset, _context ->
        email = changeset |> Ash.Changeset.get_argument(:email)

        changeset
        |> Ash.Changeset.manage_relationship(
          :memberships,
          [%{role: "owner", user: %{email: email}}],
          type: :create
        )
      end)
    end
  end

  actions do
    create :register do
      accept([:name, :slug])
      allow_nil_input([:slug])

      argument(:email, :string, allow_nil?: false)
      ...

      change(fn changeset, _context ->
        email = changeset |> Ash.Changeset.get_argument(:email)

        changeset
        |> Ash.Changeset.manage_relationship(
          :memberships,
          [%{role: "owner", user: %{email: email}}],
          type: :create
        )
      end)
    end
  end

Create action with multiple nested resources

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