How to assign default value to variable if first condition failed?

Question

I've in Ruby following expression:

env = opts.env || "staging"

How to write it in Elixir?

EDIT:

This expression in Elixir won't work:

case Repo.insert(changeset) do
  {:ok, opts} ->
    env = opts.env || "staging"

Error:

** (KeyError) key :env not found in: %Myapp.App{__meta__: #Ecto.Schema.Metadata<:loaded>

Answer 1

The exact same idiom works (assuming by "failed" you mean opts.env is nil):

iex(1)> nil || "staging"
"staging"
iex(2)> "production" || "staging"
"production"

Elixir, as Ruby, treats nil as a falsy value.