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Creating a Failure

Let's create a couple of Failure objects that describes the possible errors of the note feature.
Make sure that the Failure objects extend the base Failure class of the codenic_exception_converter package. Later, this will give us access to utility tools for conveniently converting Exceptions into Failures.
Under the note_app/modules/domain/lib/note/failures/ directory, create the following Failure objects:
1. Create a Failure indicating that the note title has exceeded the max length
Make a file named note_title_too_long_failure.dart and add the following code:
import 'package:domain/domain.dart';
import 'package:domain/note/entities/note_entry.dart';
​
/// {@template NoteTitleTooLongFailure}
/// A failure representing a [NoteEntry.title] that has exceeded the maximum
/// length.
/// {@endtemplate}
class NoteTitleTooLongFailure extends Failure {
  /// {@macro NoteTitleTooLongFailure}
  const NoteTitleTooLongFailure({super.message = 'The note title is too long'});
}
2. Create a Failure indicating that the note content has exceeded the max length
Make a file named and note_content_too_long_failure.dart add the following code:
import 'package:domain/domain.dart';
import 'package:domain/note/entities/note_entry.dart';
​
/// {@template NoteContentTooLongFailure}
/// A failure representing a [NoteEntry.content] that has exceeded the maximum
/// length.
/// {@endtemplate}
class NoteContentTooLongFailure extends Failure {
  /// {@macro NoteContentTooLongFailure}
  const NoteContentTooLongFailure({
    super.message = 'The note content is too long',
  });
}
​

Creating an Entity

Creating a Repository Interface

Last modified 11mo ago