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Tecтовое задание moyklass

Задача

Требуется создать веб-сервер на базе KoaJS или ExpressJS, который будет работать с данными по занятиям. Данные хранятся в СУБД PostgreSQL, дамп тестовых данных прилагается к тестовому заданию. Предлагается сделать 2 задачи. Первая - запрос данных, вторая - манипуляция с данными. Исполнителю предлагается сделать задачу, выбирая адекватные инструменты и общепринятые способы организации кода и API-интерфейсов, учитывая указанные в задании требования. Необходимо написать тесты для созданных методов. При разработке учитывать, что данных может быть очень много (миллионы занятий).

Notes

https://wiki.archlinux.org/title/PostgreSQL - psql info

OPTS: title date: 1 date or range status teacherdIds studentsCount: 1 or range limit

FILTER:
date                        -   WHERE date = $1 *or range*
status                      -   WHERE status = $2
teacherIds                  -   SELECT * FROM lessons WHERE id IN (SELECT lesson_id FROM lesson_teachers WHERE teacher_id = 3);
studentsCount               -   SELECT * FROM lessons WHERE id IN (SELECT lesson_id FROM lesson_students GROUP BY lesson_id HAVING COUNT(DISTINCT(student_id)) > $4);
page / lessons per page     - LIMIT $5 OFFSET $6

useful cli commands

sudo systemctl start postgresql.service sudo -iu postgres - switch to postres user psql -d moyklass-test - launcg test db

\dt - list tables

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