Nest.js 问题， 1：树形数据存修改如何操作。2： typeorm 异常如何处理

问题 1：树形数据如何修改

{
        "create_time": "2023-08-21T08:27:50.146Z",
        "update_time": "2023-08-24T07:54:34.000Z",
        "id": 1,
        "name": "部门 1",
        "code": "1111",
        "down_dep": [
            {
                "create_time": "2023-08-21T08:27:50.146Z",
                "update_time": "2023-08-24T07:55:25.000Z",
                "id": 22,
                "name": "部门 2",
                "code": "100"
            }
        ],
        "up_dep": null
    },

这种接口的数据怎么修改？还有一个问题就是 DTO 中没有 create_time ，update_time 两个字段，修改时传入就会报错。

第二个问题，typeorm 异常如何处理

   at Query.onResult (C:\pm-server\src\driver\mysql\MysqlQueryRunner.ts:222:33)
   at Query.execute (C:\pm-server\node_modules\mysql2\lib\commands\command.js:36:14)
   at PoolConnection.handlePacket (C:\pm-server\node_modules\mysql2\lib\connection.js:478:34)
   at PacketParser.onPacket (C:\pm-server\node_modules\mysql2\lib\connection.js:97:12)
   at PacketParser.executeStart (C:\pm-server\node_modules\mysql2\lib\packet_parser.js:75:16)
   at Socket.<anonymous> (C:\pm-server\node_modules\mysql2\lib\connection.js:104:25)
   at Socket.emit (node:events:513:28)
   at addChunk (node:internal/streams/readable:324:12)
   at readableAddChunk (node:internal/streams/readable:297:9)
   at Socket.Readable.push (node:internal/streams/readable:234:10) {
 query: 'INSERT INTO `dept`(`create_time`, `update_time`, `id`, `name`, `code`, `upDepId`) VALUES (DEFAULT, DEFAULT, DEFAULT, ?, ?, DEFAULT)',
 parameters: [ '456456', '1111' ],
 driverError: Error: Duplicate entry '456456' for key 'IDX_5eb4a4c9f25934f105299edffd'
     at Packet.asError (C:\pm-server\node_modules\mysql2\lib\packets\packet.js:728:17)
     at Query.execute (C:\pm-server\node_modules\mysql2\lib\commands\command.js:29:26)
     at PoolConnection.handlePacket (C:\pm-server\node_modules\mysql2\lib\connection.js:478:34)
     at PacketParser.onPacket (C:\pm-server\node_modules\mysql2\lib\connection.js:97:12)
     at PacketParser.executeStart (C:\pm-server\node_modules\mysql2\lib\packet_parser.js:75:16)
     at Socket.<anonymous> (C:\pm-server\node_modules\mysql2\lib\connection.js:104:25)
     at Socket.emit (node:events:513:28)
     at addChunk (node:internal/streams/readable:324:12)
     at readableAddChunk (node:internal/streams/readable:297:9)
     at Socket.Readable.push (node:internal/streams/readable:234:10) {
   code: 'ER_DUP_ENTRY',
   errno: 1062,
   sqlState: '23000',
   sqlMessage: "Duplicate entry '456456' for key 'IDX_5eb4a4c9f25934f105299edffd'",
   sql: "INSERT INTO `dept`(`create_time`, `update_time`, `id`, `name`, `code`, `upDepId`) VALUES (DEFAULT, DEFAULT, DEFAULT, '456456', '1111', DEFAULT)"
 },
 code: 'ER_DUP_ENTRY',
 errno: 1062,
 sqlState: '23000',
 sqlMessage: "Duplicate entry '456456' for key 'IDX_5eb4a4c9f25934f105299edffd'",
 sql: "INSERT INTO `dept`(`create_time`, `update_time`, `id`, `name`, `code`, `upDepId`) VALUES (DEFAULT, DEFAULT, DEFAULT, '456456', '1111', DEFAULT)"
}```


值重复异常如何处理？自己写正则吗？