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65 lines
1.3 KiB
Elixir
65 lines
1.3 KiB
Elixir
defmodule PhilomenaQuery.Ecto.RelativeDate do
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@moduledoc """
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Ecto custom type for relative dates.
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As a field type, it enables the following usage pattern:
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defmodule Notice do
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use Ecto.Schema
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import Ecto.Changeset
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schema "notices" do
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field :start_date, PhilomenaQuery.Ecto.RelativeDate
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field :finish_date, PhilomenaQuery.Ecto.RelativeDate
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end
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@doc false
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def changeset(notice, attrs) do
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notice
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|> cast(attrs, [:start_date, :finish_date])
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|> validate_required([:start_date, :finish_date])
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end
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end
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"""
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use Ecto.Type
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alias PhilomenaQuery.RelativeDate
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@doc false
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def type do
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:utc_datetime
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end
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@doc false
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def cast(input)
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def cast(input) when is_binary(input) do
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case RelativeDate.parse(input) do
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{:ok, result} ->
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{:ok, result}
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_ ->
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{:error, [message: "is not a valid relative or absolute date and time"]}
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end
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end
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def cast(%DateTime{} = input) do
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{:ok, input}
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end
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@doc false
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def load(datetime) do
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datetime =
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datetime
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|> DateTime.from_naive!("Etc/UTC")
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|> DateTime.truncate(:second)
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{:ok, datetime}
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end
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@doc false
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def dump(datetime) do
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{:ok, datetime}
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end
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end
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