unit.ex (1533B)
1 # Zenflows is designed to implement the Valueflows vocabulary, 2 # written and maintained by srfsh <info@dyne.org>. 3 # Copyright (C) 2021-2023 Dyne.org foundation <foundation@dyne.org>. 4 # 5 # This program is free software: you can redistribute it and/or modify 6 # it under the terms of the GNU Affero General Public License as published by 7 # the Free Software Foundation, either version 3 of the License, or 8 # (at your option) any later version. 9 # 10 # This program is distributed in the hope that it will be useful, 11 # but WITHOUT ANY WARRANTY; without even the implied warranty of 12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 # GNU Affero General Public License for more details. 14 # 15 # You should have received a copy of the GNU Affero General Public License 16 # along with this program. If not, see <https://www.gnu.org/licenses/>. 17 18 defmodule Zenflows.VF.Unit do 19 @moduledoc """ 20 Defines a unit of measurement, along with its display symbol. 21 From OM2 vocabulary. 22 """ 23 24 use Zenflows.DB.Schema 25 26 alias Ecto.Changeset 27 alias Zenflows.DB.{Schema, Validate} 28 29 @type t() :: %__MODULE__{ 30 id: String.t(), 31 label: String.t(), 32 symbol: String.t(), 33 } 34 35 schema "vf_unit" do 36 field :label, :string 37 field :symbol, :string 38 timestamps() 39 end 40 41 @reqr ~w[label symbol]a 42 @cast @reqr 43 44 @doc false 45 @spec changeset(Schema.t(), Schema.params()) :: Changeset.t() 46 def changeset(schema \\ %__MODULE__{}, params) do 47 schema 48 |> Changeset.cast(params, @cast) 49 |> Changeset.validate_required(@reqr) 50 |> Validate.name(:label) 51 |> Validate.name(:symbol) 52 end 53 end