Custom asset fields for assets.

Each Beacon.MediaLibrary.Asset has a default set of fields that fits most cases for assets for your sites, but in some cases you need custom data to either help manage those assets in Beacon Admin or to display such data.

Each asset field will be:

• stored in the asset.extra map field
• displayed in Beacon Admin
• validated when the assets are saved or published

Example

defmodule MyApp.AltTextField do
  use Phoenix.Component
  import Beacon.Web.CoreComponents
  import Ecto.Changeset

  @behaviour Beacon.MediaLibrary.AssetField

  @impl true
  def name, do: :alt

  @impl true
  def type, do: :string

  @impl true
  def render_input(assigns) do
    ~H"""
    <.input type="text" label="Alt Text" field={@field} />
    """
  end

  @impl true
  def render_show(assigns) do
    ~H"""
    <.input type="text" label="Alt Text" value={@value} />
    """
  end

  @impl true
  def changeset(data, attrs) do
    data
    |> cast(attrs, [:alt])
    |> validate_required([:alt])
  end
end