April 2020
Beginner to intermediate
540 pages
14h 14m
Russian
Content preview from MongoDB: полное руководство
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206 Глава 7. Знакомство с фреймворком агрегации
Давайте еще раз рассмотрим наш конвейер. У нас есть пять этапов.
Сначала мы отфильтровываем коллекцию companies, ища только те доку-
менты, у которых значение
"based_year" равно 2004. Затем мы делаем сор-
тировку по имени в порядке возрастания, пропуская первые 10 совпа-
дений, и ограничиваем наши конечные результаты пятью документами.
Наконец, мы передаем эти пять документов в этап
$project, где изменяем
форму документов таким образом, чтобы наши выходные документы со-
держали только название компании.
Здесь мы рассмотрели создание конвейеров с использованием этапов,
которые выполняю ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.