Hi to all!
I have the set of data for airports tickets:
%{
class: "economy",
legs: [
%{date: "2018-08-01", from: ["FRA"], to: ["LON"]},
%{date: "2018-08-10", from: ["LON"], to: ["FRA"]}
],
passengers: %{adults: 1, children: 0, infants: 0}
}
I am using cast_assoc for legs:
...
|> cast(attrs, [:passengers, :class])
|> cast_assoc(:legs)
...
I need to check that the dates in the right order (date of first flight needs to be before the date of second flight). How can I get the value of date previous changeset?