v2.3更新

sql/upgrades/v1.2.sql

@@ -0,0 +1,41 @@
+-- ===========================================
+-- 班级操行分管理系统 - v1.1 → v1.2 升级脚本
+-- 字符集: utf8mb4
+--
+-- 变更内容:
+--   1. 创建 assignments（作业表）
+--   2. 创建 homework_submissions（作业提交记录表）
+--
+-- 兼容性: 使用 IF NOT EXISTS 实现幂等，phpMyAdmin 可直接执行
+-- ===========================================
+
+-- 升级步骤 1: 创建作业表
+CREATE TABLE IF NOT EXISTS `assignments` (
+    `assignment_id` INT PRIMARY KEY AUTO_INCREMENT,
+    `subject_id` INT NOT NULL,
+    `title` VARCHAR(100) NOT NULL,
+    `description` TEXT,
+    `deadline` DATE NOT NULL,
+    `created_by` INT NOT NULL,
+    `created_at` TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    FOREIGN KEY (`subject_id`) REFERENCES `subjects`(`subject_id`),
+    FOREIGN KEY (`created_by`) REFERENCES `users`(`user_id`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
+
+-- 升级步骤 2: 创建作业提交记录表
+CREATE TABLE IF NOT EXISTS `homework_submissions` (
+    `submission_id` INT PRIMARY KEY AUTO_INCREMENT,
+    `assignment_id` INT NOT NULL,
+    `student_id` INT NOT NULL,
+    `status` ENUM('submitted', 'not_submitted', 'late') DEFAULT 'not_submitted',
+    `submit_time` DATETIME DEFAULT NULL,
+    `comments` TEXT,
+    `deduction_applied` TINYINT DEFAULT 0,
+    `deduction_record_id` BIGINT DEFAULT NULL,
+    `updated_by` INT DEFAULT NULL,
+    `updated_at` TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+    FOREIGN KEY (`assignment_id`) REFERENCES `assignments`(`assignment_id`) ON DELETE CASCADE,
+    FOREIGN KEY (`student_id`) REFERENCES `students`(`student_id`) ON DELETE CASCADE,
+    FOREIGN KEY (`deduction_record_id`) REFERENCES `conduct_records`(`record_id`) ON DELETE SET NULL,
+    UNIQUE KEY `uk_assignment_student` (`assignment_id`, `student_id`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;