Question

我想实现soft_delete。因此，我在模型类beforeBulkDelete中创建了一个钩子，该钩子调用了一个存储过程，该存储过程将某个日期放在deleted_at列中并返回TRIGGER。

我想返回NULL作为触发器，因此不会发生实际的删除。

我尝试使用CREATE TRIGGER命令而不是使用Sequelize挂钩来创建触发器，并且效果很好。但是我想用钩子来做。

这是我的模型课-

```export default function defineAttachment(
  sequelize: Sequelize.Sequelize,
  DataTypes: any
) {
  const XerceCaseAttachment = sequelize.define(
    'XerceCaseAttachment',
    {
      id: {
        type: DataTypes.INTEGER,
        primaryKey: true,
        autoIncrement: true,
      },
      .
      .
      .
      deletedAt: {
        type: DataTypes.DATE,
        field: 'deleted_at',
      },
    },
    {
      tableName: 'attachments',
      hooks: {
        beforeBulkDestroy: (options: any) => {
          sequelize.query(`SELECT soft_delete();`, {
            type: sequelize.QueryTypes.DELETE,
            transaction: options.transaction,
          });
        },
      },
    }
  );```

这是我的soft_delete存储过程-

```CREATE OR REPLACE FUNCTION soft_delete()
 RETURNS TRIGGER AS
$$
   BEGIN
     RAISE NOTICE 'test triggers';
     EXECUTE 'UPDATE attachments SET deleted_at = current_timestamp WHERE id = $1';
     RETURN NULL;
   END;
$$ LANGUAGE PLPGSQL;```

我遇到以下错误-

```Unhandled rejection SequelizeDatabaseError: trigger functions can only be called as triggers
    at Query.formatError (/home/ishankhanduja/Cyberdyne/cyberdyne/server/node_modules/sequelize/lib/dialects/postgres/query.js:363:16)
    at query.catch.err (/home/ishankhanduja/Cyberdyne/cyberdyne/server/node_modules/sequelize/lib/dialects/postgres/query.js:86:18)
    at bound (domain.js:395:14)
    at runBound (domain.js:408:12)
    at tryCatcher (/home/ishankhanduja/Cyberdyne/cyberdyne/server/node_modules/bluebird/js/release/util.js:16:23)
    at Promise._settlePromiseFromHandler (/home/ishankhanduja/Cyberdyne/cyberdyne/server/node_modules/bluebird/js/release/promise.js:512:31)
    at Promise._settlePromise (/home/ishankhanduja/Cyberdyne/cyberdyne/server/node_modules/bluebird/js/release/promise.js:569:18)
    at Promise._settlePromise0 (/home/ishankhanduja/Cyberdyne/cyberdyne/server/node_modules/bluebird/js/release/promise.js:614:10)
    at Promise._settlePromises (/home/ishankhanduja/Cyberdyne/cyberdyne/server/node_modules/bluebird/js/release/promise.js:690:18)
    at _drainQueueStep (/home/ishankhanduja/Cyberdyne/cyberdyne/server/node_modules/bluebird/js/release/async.js:138:12)
    at _drainQueue (/home/ishankhanduja/Cyberdyne/cyberdyne/server/node_modules/bluebird/js/release/async.js:131:9)
    at Async._drainQueues (/home/ishankhanduja/Cyberdyne/cyberdyne/server/node_modules/bluebird/js/release/async.js:147:5)
    at Immediate.Async.drainQueues [as _onImmediate] (/home/ishankhanduja/Cyberdyne/cyberdyne/server/node_modules/bluebird/js/release/async.js:17:14)
    at runCallback (timers.js:705:18)
    at tryOnImmediate (timers.js:676:5)
    at processImmediate (timers.js:658:5)
    at process.topLevelDomainCallback (domain.js:120:23)```

期望-

它不应删除该行，而是将某些日期存储在delete_at

Sequelize-使用挂钩调用触发器函数

0 个答案: