CODEWITHSUNDEEP
elixir
Sorvah
Sorvah

Reputation: 333

How do you create a new DateTime since Ecto.DateTime was deprecated?

I currently have a Date and a Time that I would really like to combine into a DateTime struct.

Prior to Ecto 3 you could do this with Ecto.DateTime.from_date_and_time but in the new documentation since the Ecto Types were deprecated I can't find an equivalent function.

The function currently looks like:

def add_datetime(date_as_string) do
 (_, date = Date.from_iso8601(date)
 end_time = #T[23:59:59]

 datetime = datetime_add(Ecto.DateTime.from_date_and_time(date, end_time), -3, "day")
end

One of the constraints of this particular project is that I would like to avoid adding a third party library like Timex if at all possible but I am lost after looking at the current Elixir documentation.

Upvotes: 1

Views: 504

Answers (3)

Adam Millerchip
Adam Millerchip

Reputation: 23091

With DateTime.new/4:

iex(1)> DateTime.new(~D[2022-11-19], ~T[21:49:00])
{:ok, ~U[2022-11-19 21:49:00Z]}

You can also specify the time zone, if you set up a time zone database:

iex(2)> Mix.install [:tz]
iex(3)> Calendar.put_time_zone_database(Tz.TimeZoneDatabase)
iex(4)> DateTime.new(~D[2022-11-19], ~T[21:49:00], "Asia/Tokyo")
{:ok, #DateTime<2022-11-19 21:49:00+09:00 JST Asia/Tokyo>}

Upvotes: 0

Sorvah
Sorvah

Reputation: 333

For anyone finding this on Google you can also use a NaiveDateTime if you don't care about the timezone information:

datetime= NaiveDateTime.new(date_struct, time_struct)
|> DateTime.from_naive("Etc/UTC")

Upvotes: 0

fhdhsni
fhdhsni

Reputation: 1629

You can use DateTime.from_iso8601/2.

datetime_iso8601 = "#{Date.to_iso8601(date)}T#{Time.to_iso8601(time)}+03:30"
{:ok, datetime, offset_from_utc} = DateTime.from_iso8601(datetime_iso8601)

Instead of +3:30 use your desired offset, or Z for UTC.

Upvotes: 2

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