Question

当尝试撤消heroku-postgres数据库中的迁移迁移时，由于ENUM类型不存在，我得到了SequelizeDatabaseError。

我有几个具有ENUM数据类型的表/模型。在向下迁移中，我尝试删除表，然后也删除表的关联枚举数据类型。到目前为止，似乎只能在两个方向上正确应用一次迁移。

我尝试手动删除每种类型，然后全部迁移，然后全部撤消，但是在同一模型上总是失败，说ENUM类型不存在（显然是在向上迁移中创建的）。

这是一个迁移失败的模型。

'use strict';
module.exports = {
  up: (queryInterface, Sequelize) => {
    return queryInterface.createTable('PatientContacts', {
      id: {
        allowNull: false,
        autoIncrement: true,
        primaryKey: true,
        type: Sequelize.INTEGER
      },
      phoneHome: {
        type: Sequelize.STRING,
        allowNull: true,
      },
      phoneWork: {
        type: Sequelize.STRING,
        allowNull: true,
      },
      phoneMobile: {
        type: Sequelize.STRING,
        allowNull: false,
      },
      phonePreferred: {
        type: Sequelize.ENUM,
        values: ['Home','Work','Mobile', null]
      },
      smsNotifications: {
        type: Sequelize.ENUM,
        values: [true, false, null]
      },
      email: {
        type: Sequelize.STRING,
        allowNull: true,
      },
      emailConsent: {
        type: Sequelize.ENUM,
        values: [true, false, null]
      },
      createdAt: {
        allowNull: false,
        type: Sequelize.DATE
      },
      updatedAt: {
        allowNull: false,
        type: Sequelize.DATE
      }
    });
  },
  down: (queryInterface, Sequelize) => {
    return queryInterface.dropTable('PatientContacts')
    .then(() => queryInterface.sequelize.query('DROP TYPE "public"."enum_PatientContacts_emailConsent;"'))
    .then(() => queryInterface.sequelize.query('DROP TYPE "public"."enum_PatientContacts_phonePreferred;"'))
    .then(() => queryInterface.sequelize.query('DROP TYPE "public"."enum_PatientContacts_smsNotifications;"'))
    .catch(err => {
      console.log(err);
      throw new Error(err);
    })
  }
};

我希望向下迁移可以在回调中执行原始查询。但是，该错误如上所述。

Error: SequelizeDatabaseError: type "public.enum_PatientContacts_emailConsent;" does not exist
at queryInterface.dropTable.then.then.then.catch.err (/app/migrations/20181213023202-create-PatientContact.js:56:13)
at tryCatcher (/app/node_modules/bluebird/js/release/util.js:16:23)
at Promise._settlePromiseFromHandler (/app/node_modules/bluebird/js/release/promise.js:512:31)
at Promise._settlePromise (/app/node_modules/bluebird/js/release/promise.js:569:18)
at Promise._settlePromise0 (/app/node_modules/bluebird/js/release/promise.js:614:10)
at Promise._settlePromises (/app/node_modules/bluebird/js/release/promise.js:690:18)
at _drainQueueStep (/app/node_modules/bluebird/js/release/async.js:138:12)
at _drainQueue (/app/node_modules/bluebird/js/release/async.js:131:9)
at Async._drainQueues (/app/node_modules/bluebird/js/release/async.js:147:5)
at Immediate.Async.drainQueues [as _onImmediate] (/app/node_modules/bluebird/js/release/async.js:17:14)
at runCallback (timers.js:693:18)
at tryOnImmediate (timers.js:664:5)
at processImmediate (timers.js:646:5)

我应该提到，在我的最新尝试中，以“ public”作为类型名称的前缀。删除它也会产生相同的结果。

Answer 1

对于这个问题困扰了几个小时，我感到非常失望。

用分号结束原始查询的目的是在双引号之后键入类型名称，但在单引号之前结束整个sql查询本身。

SequelizeDatabaseError：删除不存在的ENUM类型，但它们实际上存在

1 个答案: