peri-ecto-v0.4.0-rc1.ex

defmodule Example do
  @schema %{
    name: {:required, :string},
    profile: %{
      email: {:required, :string},
      username: {:required, :string}
    }
  }

  def changeset(%{} = attrs) do
    Peri.to_changeset!(@schema, attrs)
  end
end

# iex(2)> Example.changeset %{}
# #Ecto.Changeset<
#   action: nil,
#   changes: %{},
#   errors: [
#     profile: {"can't be blank", [validation: :required]},
#     name: {"can't be blank", [validation: :required]}
#   ],
#   data: %{},
#   valid?: false,
#   ...
# >
# iex(3)> Example.changeset %{name: "hello", profile: %{email: :invalid}}
# #Ecto.Changeset<
#   action: nil,
#   changes: %{
#     name: "hello",
#     profile: #Ecto.Changeset<
#       action: nil,
#       changes: %{},
#       errors: [
#         username: {"can't be blank", [validation: :required]},
#         email: {"is invalid", [type: :string, validation: :cast]}
#       ],
#       data: %{},
#       valid?: false,
#       ...
#     >
#   },
#   errors: [],
#   data: %{},
#   valid?: false,
#   ...
# >
# iex(4)> Example.changeset %{name: "hello", profile: %{email: "zoey", username: "zoedsoupe"}}
# #Ecto.Changeset<
#   action: nil,
#   changes: %{
#     name: "hello",
#     profile: #Ecto.Changeset<
#       action: nil,
#       changes: %{email: "zoey", username: "zoedsoupe"},
#       errors: [],
#       data: %{},
#       valid?: true,
#       ...
#     >
#   },
#   errors: [],
#   data: %{},
#   valid?: true,
#   ...
# >