Check pattern whether pattern match has succeeded or failed

Question

In Elixir, is there an idiomatic way to check that a match has succeeded or failed without using error mechanisms like try/rescue?

Answer 1

While the answer by @PatNowak is absolutely correct, I personally prefer to have a private function handler(s) with different clauses to make the code more structured:

Insertion:

changeset
|> Repo.insert()
|> handle_insert()

Handlers:

defp handle_insert({:ok, user}), do: happy_path
defp handle_insert({:error, changeset}), do: sad_path
defp handle_insert(whatever), do: Logger.debug()