So this is my first time using embedded schema and I’m having an issue finding information to help me work through how to handle what I need to do in my app.

Basically, a company has the option to white label their site. We’re storing their white label configurations in an embedded schema that we can pull into our front-end applications.

As of now we’re storing the white label information in a white label table in our database and each configuration belongs to a company. I’m unsure of how to handle creating and updating the embedded schema.

defmodule App.WhiteLabels.WhiteLabel do
  @moduledoc false

  use Ecto.Schema
  import Ecto.Changese

  schema "white_labels" do
    field(:subdomain, :string)
    belongs_to(:company, App.Companys.Company
      foreign_key: :company_id
    )
    embeds_one(:themes, App.WhiteLabels.Theme)
    timestamps()
  end

  @doc false
  @spec changeset(%__MODULE__{}, map) :: %Ecto.Changeset{}
  def changeset(schema, attrs) do
    schema
    |> cast(attrs, [:subdomain, :company_id])
    |> validate_required([:subdomain, :company_id])
    |> cast_embed(:themes, required: true)
  end

defmodule App.WhiteLabels.Theme do
  @moduledoc false

  use Ecto.Schema
  import Ecto.Changeset

  embedded_schema do
    field :logo, :string
    field :logo_alt, :string
    field :favicon, :string
    field :background, :string
    field :header_background, :string
    field :header_text, :string
    field :title, :string
    field :text, :string
  end

  @fields [
    :logo,
    :logo_alt,
    :favicon,
    :background,
    :header_background,
    :header_text,
    :title,
    :text,
  ]

  @doc false
  @spec changeset(%__MODULE__{}, map) :: %Ecto.Changeset{}
  def changeset(schema, attrs) do
    schema
    |> cast(attrs, @fields)
  end
end

How would I create a new white label when I need to create %WhiteList{} and %Theme{} at the same time? Does this make sense? Most of the examples I find are adding new embedded schema data to already created data or updating an embedded schema.