sandbox_two.ex

defmodule Phoenix.Ecto.SQL.Sandbox do
  import Plug.Conn

  @cookie_name "phoenix.ecto.sql.sandbox"

  def init(opts), do: opts

  def call(%{request_path: @config_path <> configuration} = conn, _opts) do
    conn |> put_resp_cookie(@cookie_name, configuration) |> send_resp(200, "OK") |> halt
  end
  
  # ...
end