fix: adapt init.sql lessons table to match Create-Lesson branch entity

db/init/init.sql

@@ -184,118 +184,13 @@ CREATE TABLE IF NOT EXISTS teacher_lesson_types (
 CREATE TABLE IF NOT EXISTS lessons (
     id BIGSERIAL PRIMARY KEY,
     teacher_id BIGINT NOT NULL REFERENCES users(id),
-    subject_id BIGINT NOT NULL REFERENCES subjects(id),
-    lesson_type_id BIGINT NOT NULL REFERENCES lesson_types(id),
-    classroom_id BIGINT NOT NULL REFERENCES classrooms(id),
     group_id BIGINT NOT NULL REFERENCES student_groups(id),
-    subgroup_id BIGINT REFERENCES subgroups(id),
-    
-    day_of_week INT NOT NULL CHECK (day_of_week BETWEEN 1 AND 7),
-    is_even_week BOOLEAN NOT NULL,
-    start_time TIME NOT NULL,
-    end_time TIME NOT NULL,
-    
-    -- Дополнительные поля
-    semester INT CHECK (semester BETWEEN 1 AND 12),
-    academic_year VARCHAR(9), -- например: '2023-2024'
-    is_active BOOLEAN DEFAULT TRUE,
-    notes TEXT,
-    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
-    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
-    
-    -- Проверки
-    CHECK (end_time > start_time),
-    CHECK (end_time <= start_time + INTERVAL '4 hours') -- Максимальная длина занятия 4 часа
+    lesson_type_id BIGINT NOT NULL REFERENCES lesson_types(id),
+    day VARCHAR(255) NOT NULL,
+    week VARCHAR(255) NOT NULL,
+    time VARCHAR(255) NOT NULL
 );
 
--- Индексы для эффективного поиска
-CREATE INDEX IF NOT EXISTS idx_lessons_teacher ON lessons(teacher_id, day_of_week, is_even_week);
-CREATE INDEX IF NOT EXISTS idx_lessons_group ON lessons(group_id, day_of_week, is_even_week);
-CREATE INDEX IF NOT EXISTS idx_lessons_classroom ON lessons(classroom_id, day_of_week, is_even_week, start_time);
-CREATE INDEX IF NOT EXISTS idx_lessons_datetime ON lessons(day_of_week, start_time, end_time);
-CREATE INDEX IF NOT EXISTS idx_lessons_active ON lessons(is_active);
-
--- ==========================================
--- Таблица для отслеживания замен и изменений в расписании
--- ==========================================
-CREATE TABLE IF NOT EXISTS schedule_changes (
-    id BIGSERIAL PRIMARY KEY,
-    original_lesson_id BIGINT REFERENCES lessons(id) ON DELETE SET NULL,
-    new_teacher_id BIGINT REFERENCES users(id),
-    new_classroom_id BIGINT REFERENCES classrooms(id),
-    new_start_time TIME,
-    new_end_time TIME,
-    change_reason TEXT NOT NULL,
-    changed_by BIGINT REFERENCES users(id),
-    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
-    effective_date DATE NOT NULL
-);
-
--- ==========================================
--- Функция для проверки пересечений расписания
--- ==========================================
-CREATE OR REPLACE FUNCTION check_schedule_conflict()
-RETURNS TRIGGER AS $$
-BEGIN
-    -- Проверка пересечений для преподавателя
-    IF EXISTS (
-        SELECT 1 FROM lessons
-        WHERE teacher_id = NEW.teacher_id
-        AND day_of_week = NEW.day_of_week
-        AND is_even_week = NEW.is_even_week
-        AND id != COALESCE(NEW.id, -1)
-        AND (
-            (start_time <= NEW.start_time AND end_time > NEW.start_time)
-            OR (start_time < NEW.end_time AND end_time >= NEW.end_time)
-            OR (start_time >= NEW.start_time AND end_time <= NEW.end_time)
-        )
-    ) THEN
-        RAISE EXCEPTION 'Конфликт расписания для преподавателя';
-    END IF;
-    
-    -- Проверка пересечений для аудитории
-    IF EXISTS (
-        SELECT 1 FROM lessons
-        WHERE classroom_id = NEW.classroom_id
-        AND day_of_week = NEW.day_of_week
-        AND is_even_week = NEW.is_even_week
-        AND id != COALESCE(NEW.id, -1)
-        AND (
-            (start_time <= NEW.start_time AND end_time > NEW.start_time)
-            OR (start_time < NEW.end_time AND end_time >= NEW.end_time)
-            OR (start_time >= NEW.start_time AND end_time <= NEW.end_time)
-        )
-    ) THEN
-        RAISE EXCEPTION 'Конфликт расписания для аудитории';
-    END IF;
-    
-    -- Проверка пересечений для группы
-    IF EXISTS (
-        SELECT 1 FROM lessons
-        WHERE group_id = NEW.group_id
-        AND day_of_week = NEW.day_of_week
-        AND is_even_week = NEW.is_even_week
-        AND id != COALESCE(NEW.id, -1)
-        AND (
-            (start_time <= NEW.start_time AND end_time > NEW.start_time)
-            OR (start_time < NEW.end_time AND end_time >= NEW.end_time)
-            OR (start_time >= NEW.start_time AND end_time <= NEW.end_time)
-        )
-    ) THEN
-        RAISE EXCEPTION 'Конфликт расписания для группы';
-    END IF;
-    
-    RETURN NEW;
-END;
-$$ LANGUAGE plpgsql;
-
--- Триггер для проверки конфликтов при вставке/обновлении
-DROP TRIGGER IF EXISTS check_lesson_conflict ON lessons;
-CREATE TRIGGER check_lesson_conflict
-    BEFORE INSERT OR UPDATE ON lessons
-    FOR EACH ROW
-    EXECUTE FUNCTION check_schedule_conflict();
-
 -- ==========================================
 -- Функция обновления timestamp
 -- ==========================================
@@ -313,16 +208,8 @@ CREATE TRIGGER update_users_updated_at
     FOR EACH ROW
     EXECUTE FUNCTION update_updated_at_column();
 
-CREATE TRIGGER update_lessons_updated_at
-    BEFORE UPDATE ON lessons
-    FOR EACH ROW
-    EXECUTE FUNCTION update_updated_at_column();
-
 -- ==========================================
 -- Комментарии к таблицам и полям (для документации)
 -- ==========================================
 COMMENT ON TABLE users IS 'Пользователи системы (студенты, преподаватели, администраторы)';
 COMMENT ON TABLE lessons IS 'Основное расписание занятий';
-COMMENT ON COLUMN lessons.day_of_week IS 'День недели (1-Пн, 2-Вт, 3-Ср, 4-Чт, 5-Пт, 6-Сб, 7-Вс)';
-COMMENT ON COLUMN lessons.is_even_week IS 'true - четная неделя, false - нечетная';
-COMMENT ON TABLE schedule_changes IS 'История изменений и замен в расписании';