refactor(notification): 更新通知表结构，移除自增主键，手动生成ID

db/create_edu_tables.sql

@@ -63,21 +63,20 @@ CREATE TABLE `edu_teacher` (
 -- 4. 通知表
 DROP TABLE IF EXISTS `sys_notification`;
 CREATE TABLE `sys_notification` (
-  `id` BIGINT(20) NOT NULL AUTO_INCREMENT COMMENT '主键ID',
+  `id` BIGINT NOT NULL COMMENT '主键ID',
-  `school_id` BIGINT(20) NOT NULL COMMENT '学校ID（数据隔离）',
+  `school_id` BIGINT DEFAULT NULL COMMENT '学校ID',
-  `user_id` BIGINT(20) NOT NULL COMMENT '用户ID',
+  `user_id` BIGINT DEFAULT NULL COMMENT '接收用户ID',
-  `title` VARCHAR(100) NOT NULL COMMENT '通知标题',
+  `title` VARCHAR(255) DEFAULT NULL COMMENT '通知标题',
-  `content` TEXT NOT NULL COMMENT '通知内容',
+  `content` TEXT COMMENT '通知内容',
-  `type` TINYINT(1) DEFAULT '1' COMMENT '通知类型：1-系统通知，2-作业通知，3-考试通知，4-考勤通知，5-用户通知，6-课程通知',
+  `type` TINYINT DEFAULT NULL COMMENT '通知类型',
-  `is_read` TINYINT(1) DEFAULT '0' COMMENT '是否已读：0-未读，1-已读',
+  `is_read` TINYINT DEFAULT '0' COMMENT '是否已读 0未读 1已读',
-  `sender_id` BIGINT(20) DEFAULT NULL COMMENT '发送者用户ID',
+  `sender_id` BIGINT DEFAULT NULL COMMENT '发送人ID',
-  `sender_name` VARCHAR(100) DEFAULT NULL COMMENT '发送者姓名',
+  `sender_name` VARCHAR(64) DEFAULT NULL COMMENT '发送人姓名',
-  `target_type` TINYINT(1) DEFAULT '1' COMMENT '目标类型：1-单个用户，2-角色，3-课程',
+  `target_type` TINYINT DEFAULT NULL COMMENT '目标类型',
-  `create_time` DATETIME DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
+  `create_time` DATETIME DEFAULT NULL COMMENT '创建时间',
-  PRIMARY KEY (`id`),
+  PRIMARY KEY (`id`) USING BTREE,
-  KEY `idx_school_id` (`school_id`),
   KEY `idx_user_id` (`user_id`),
-  KEY `idx_is_read` (`is_read`)
+  KEY `idx_school_id` (`school_id`)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='通知表';
 
 -- 5. 课程表

src/main/java/art/kexue/sxwz/service/impl/SysNotificationServiceImpl.java

@@ -219,6 +219,7 @@ public class SysNotificationServiceImpl implements SysNotificationService {
                                               String content, Integer type, Long senderId,
                                               String senderName, Integer targetType) {
         SysNotification notification = new SysNotification();
+        notification.setId(System.currentTimeMillis());
         notification.setSchoolId(schoolId);
         notification.setUserId(userId);
         notification.setTitle(title);

src/main/resources/mapper/SysNotificationMapper.xml

@@ -121,11 +121,11 @@
         WHERE user_id = #{userId} AND school_id = #{schoolId} AND is_read = 0
     </select>
 
-    <insert id="batchInsert" useGeneratedKeys="true" keyProperty="id">
+    <insert id="batchInsert">
-        INSERT INTO sys_notification (school_id, user_id, title, content, type, is_read, sender_id, sender_name, target_type, create_time)
+        INSERT INTO sys_notification (id, school_id, user_id, title, content, type, is_read, sender_id, sender_name, target_type, create_time)
         VALUES
         <foreach collection="list" item="item" separator=",">
-            (#{item.schoolId}, #{item.userId}, #{item.title}, #{item.content}, #{item.type}, #{item.isRead}, #{item.senderId}, #{item.senderName}, #{item.targetType}, #{item.createTime})
+            (#{item.id}, #{item.schoolId}, #{item.userId}, #{item.title}, #{item.content}, #{item.type}, #{item.isRead}, #{item.senderId}, #{item.senderName}, #{item.targetType}, #{item.createTime})
         </foreach>
     </insert>