Specs

handle_errors(
  t(),
  (t(), error :: term() ->
     :ignore | t() | (error :: term()) | {error :: term(), t()})
  | {module(), atom(), [term()]}
) :: t()

Sets a custom error handler on the changeset.

The error handler should be a two argument function or an mfa, in which case the first two arguments will be set to the changeset and the error, w/ the supplied arguments following those.

Any errors generated are passed to handle_errors, which can return any of the following:

• :ignore - the error is discarded, and the changeset is not marked as invalid
• changeset - a new (or the same) changeset. The error is not added (you'll want to add an error yourself), but the changeset is marked as invalid.
• {changeset, error} - a new (or the same) error and changeset. The error is added to the changeset, and the changeset is marked as invalid.
• anything_else - is treated as a new, transformed version of the error. The result is added as an error to the changeset, and the changeset is marked as invalid.