Change models, new migrations, fix front and make tests work

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

lib/eventos/events/session.ex

@@ -0,0 +1,30 @@
+defmodule Eventos.Events.Session do
+  use Ecto.Schema
+  import Ecto.Changeset
+  alias Eventos.Events.{Session, Event, Track}
+
+
+  schema "sessions" do
+    field :audios_urls, :string
+    field :language, :string
+    field :long_abstract, :string
+    field :short_abstract, :string
+    field :slides_url, :string
+    field :subtitle, :string
+    field :title, :string
+    field :videos_urls, :string
+    field :begins_on, Timex.Ecto.DateTimeWithTimezone
+    field :ends_on, Timex.Ecto.DateTimeWithTimezone
+    belongs_to :event, Event
+    belongs_to :track, Track
+
+    timestamps()
+  end
+
+  @doc false
+  def changeset(%Session{} = session, attrs) do
+    session
+    |> cast(attrs, [:title, :subtitle, :short_abstract, :long_abstract, :language, :slides_url, :videos_urls, :audios_urls, :event_id, :track_id])
+    |> validate_required([:title, :subtitle, :short_abstract, :long_abstract, :language, :slides_url, :videos_urls, :audios_urls])
+  end
+end