bump_server/lib/bump/messages/message.ex

defmodule Bump.Messages.Message do
  use Ecto.Schema
  import Ecto.Changeset

  schema "messages" do
    field :sender, :string
    field :title, :string, default: ""
    field :data, :string, default: ""
    field :timestamp, :utc_datetime
    timestamps()
  end

  def changeset(message, params) do
    message
    |> cast(params, [:sender, :data, :timestamp])
  end
end