parameter

# defmodule MyApp.User do
#   use Ecto.Schema
#   import Ecto.Changeset

#   schema "users" do
#     field(:first_name)
#     field(:last_name)
#     field(:email)
#     field :age, :integer
#     has_many :addresses, MyApp.Address
#   end

#   def asdf() do
#     params = %{
#       addresses: [%{city: "New York", street: "York"}],
#       email: "john@email.com",
#       first_name: "John",
#       last_name: "Doe"
#     }

#     changeset(params)
#     |> Ecto.Changeset.apply_action(:update)
#   end

#   def changeset(params \\ %{}) do
#     %__MODULE__{}
#     |> cast(params, [:first_name, :last_name, :email, :age])
#     |> validate_required([:first_name, :email])
#     |> validate_format(:email, ~r/@/)
#     |> Ecto.Changeset.cast_assoc(:addresses, with: &MyApp.Address.changeset/2)
#   end
# end

# defmodule User do
#   use Parameter.Schema
#   alias Parameter.Extensions.Changeset

#   param do
#     field :first_name, :string, key: "firstName", required: true
#     field :last_name, :string, key: "lastName"
#     field :email, :string
#     has_one :address, Address
#   end

#   def load() do
#     Parameter.load(
#       User,
#       %{
#         "address" => %{"city" => "New York", "street" => "York"},
#         "email" => "john@email.com",
#         "firstName" => "John",
#         "lastName" => "Doe"
#       },
#       struct: true
#     )
#     |> case do
#       {:ok, entity} ->
#         changeset(entity)
#         |> Ecto.Changeset.apply_action(:update)

#       error ->
#         error
#     end
#   end

#   def changeset(params) do
#     User
#     |> Changeset.cast(params)
#     |> Changeset.cast_assoc(:address, with: &Address.changeset/1)
#   end
# end