debianize-mobilizon/lib/eventos/events/event.ex

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Elixir
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defmodule Eventos.Events.Event.TitleSlug do
alias Eventos.Events.Event
import Ecto.Query
alias Eventos.Repo
use EctoAutoslugField.Slug, from: :title, to: :slug
def build_slug(sources, changeset) do
slug = super(sources, changeset)
build_unique_slug(slug, changeset)
end
defp build_unique_slug(slug, changeset) do
query = from e in Event,
where: e.slug == ^slug
case Repo.one(query) do
nil -> slug
_event ->
slug
|> increment_slug
|> build_unique_slug(changeset)
end
end
defp increment_slug(slug) do
case List.pop_at(String.split(slug, "-"), -1) do
{nil, _} ->
slug
{suffix, slug_parts} ->
case Integer.parse(suffix) do
{id, _} -> Enum.join(slug_parts, "-") <> "-" <> Integer.to_string(id + 1)
:error -> slug <> "-1"
end
end
end
end
defmodule Eventos.Events.Event do
use Ecto.Schema
import Ecto.Changeset
alias Eventos.Events.{Event, Participant, Request, Tag, Session, Track}
alias Eventos.Events.Event.TitleSlug
alias Eventos.Accounts.Account
schema "events" do
field :begins_on, Timex.Ecto.DateTimeWithTimezone
field :description, :string
field :ends_on, Timex.Ecto.DateTimeWithTimezone
field :title, :string
field :geom, Geo.Geometry
field :slug, TitleSlug.Type
field :state, :integer, default: 0
field :public, :boolean, default: true
field :thumbnail, :string
field :large_image, :string
field :publish_at, Timex.Ecto.DateTimeWithTimezone
belongs_to :organizer, Account, [foreign_key: :organizer_id]
has_many :tags, Tag
many_to_many :participants, Account, join_through: Participant
has_many :event_request, Request
has_many :tracks, Track
has_many :sessions, Session
timestamps()
end
@doc false
def changeset(%Event{} = event, attrs) do
event
|> cast(attrs, [:title, :description, :begins_on, :ends_on, :organizer_id])
|> validate_required([:title, :description, :begins_on, :ends_on, :organizer_id])
|> TitleSlug.maybe_generate_slug()
|> TitleSlug.unique_constraint()
end
end