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Fetch relations using floor
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@Query('SELECT * FROM article ORDER BY publishedAt DESC') | |
Stream<List<Article>> getAllArticles(); | |
@Query('SELECT Author.*, _junction.articleId as articleId FROM ArticleAuthor AS _junction inner join Author ON (_junction.authorId = Author.id) WHERE _junction.articleId IN (:ids)') | |
Future<List<AuthorArticleId>> getAuthorsFromArticles(List<int> ids); | |
Stream<List<ArticleWithAuthor>> getAllArticlesWithAuthors() { | |
final stream = getAllArticles(); | |
final controller = StreamController<List<ArticleWithAuthor>>.broadcast(); | |
Future<void> getInternalAuthors(List<Article> articles) async { | |
final ids = articles.map((it) => it.id).toList(); | |
final authors = await getAuthorsFromArticles(ids); | |
final result = articles.map((element) { | |
final data = authors.firstWhere((it) => it.articleId == element.id); | |
Author author; | |
if (data != null) { | |
author = Author(data.id, data.name, data.slug, data.avatar); | |
} | |
return ArticleWithAuthor( | |
element, | |
author | |
); | |
}).toList(); | |
controller.add(result); | |
} | |
stream.listen( | |
(articles) async { | |
getInternalAuthors(articles); | |
}, | |
onDone: () => controller.close() | |
); | |
return controller.stream; | |
} |
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