Merge pull request #568 from podlove/feature/add-episode-slug

feature: adding slug field to episodes

lib/radiator/podcast/episode.ex

@@ -7,11 +7,13 @@ defmodule Radiator.Podcast.Episode do
  import Ecto.Changeset
 
  alias Radiator.Podcast.Show
+ @slug_max_length 500
 
  schema "episodes" do
  field :title, :string
  field :number, :integer
  field :publish_date, :date
+ field :slug, :string
 
  belongs_to :show, Show
 
@@ -21,7 +23,24 @@ defmodule Radiator.Podcast.Episode do
  @doc false
  def changeset(episode, attrs) do
  episode
- |> cast(attrs, [:title, :show_id, :number, :publish_date])
+ |> cast(attrs, [:title, :show_id, :number, :publish_date, :slug])
  |> validate_required([:title, :show_id, :number])
+ |> validate_length(:title, min: 3)
+ |> maybe_update_slug()
+ end
+
+ defp maybe_update_slug(changeset) do
+ # Check if the title has changed
+ case get_change(changeset, :title) do
+ nil ->
+ # No title change, keep slug as is
+ changeset
+
+ new_title ->
+ new_slug = Slug.slugify(new_title, truncate: @slug_max_length)
+
+ changeset
+ |> put_change(:slug, new_slug)
+ end
  end
 end

lib/radiator_web/live/episode_live/index.html.heex

@@ -16,6 +16,8 @@
  <img src={"/images/pic1#{i}.jpg"} alt="" width="100" />
  <%= episode.number %>
  <%= episode.title %>
+ <br />
+ <%= episode.slug %>
  </.link>
  </li>
  </ol>

priv/repo/migrations/20240916151804_add_slug_to_episodes.exs

@@ -0,0 +1,9 @@
+defmodule Radiator.Repo.Migrations.AddSlugToEpisodes do
+ use Ecto.Migration
+
+ def change do
+ alter table(:episodes) do
+ add :slug, :string
+ end
+ end
+end

test/radiator/podcast_test.exs

@@ -146,6 +146,7 @@ defmodule Radiator.PodcastTest do
  assert episode.title == "some title"
  assert episode.show_id == show.id
  assert episode.number == 5
+ assert episode.slug == "some-title"
  end
 
  test "create_episode/1 with invalid data returns error changeset" do
@@ -160,6 +161,7 @@ defmodule Radiator.PodcastTest do
  assert {:ok, %Episode{} = episode} = Podcast.update_episode(episode, update_attrs)
  assert episode.title == "some updated title"
  assert episode.show_id == updated_podcast.id
+ assert episode.slug == "some-updated-title"
  end
 
  test "update_episode/2 with invalid data returns error changeset" do