Sequelize 無服務器離線遷移錯誤

Question

使用此命令sls offline start --httpPort 12012 -s local服務器在本地環境中成功啟動。

但是這個命令結果是error sls offline migrations --httpPort 12012 -s local

  Serverless Error ---------------------------------------
 
  "migrations" is not a valid sub command. Run "serverless offline" to see a more helpful error message for this command.
 
  Get Support --------------------------------------------
     Docs:          docs.serverless.com
     Bugs:          github.com/serverless/serverless/issues
     Issues:        forum.serverless.com
 
  Your Environment Information ---------------------------
     Operating System:          linux
     Node Version:              14.4.0
     Framework Version:         1.75.1
     Plugin Version:            3.6.16
     SDK Version:               2.3.1
     Components Version:        2.32.0

如果我運行serverless migrations up則會發生錯誤。

Serverless: Setting up connections...
Serverless: Looking for pending migrations...
Executing (default): CREATE TABLE IF NOT EXISTS `SequelizeMeta` (`name` VARCHAR(255) NOT NULL UNIQUE , PRIMARY KEY (`name`)) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE utf8_unicode_ci;
Executing (default): SHOW INDEX FROM `SequelizeMeta`
Executing (default): SELECT `name` FROM `SequelizeMeta` AS `SequelizeMeta` ORDER BY `SequelizeMeta`.`name` ASC;
Serverless: Applying pending migrations...
Executing (default): CREATE TABLE IF NOT EXISTS `SequelizeMeta` (`name` VARCHAR(255) NOT NULL UNIQUE , PRIMARY KEY (`name`)) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE utf8_unicode_ci;
Executing (default): SHOW INDEX FROM `SequelizeMeta`
Executing (default): SELECT `name` FROM `SequelizeMeta` AS `SequelizeMeta` ORDER BY `SequelizeMeta`.`name` ASC;
Executing (default): CREATE TABLE IF NOT EXISTS `SequelizeMeta` (`name` VARCHAR(255) NOT NULL UNIQUE , PRIMARY KEY (`name`)) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE utf8_unicode_ci;
Executing (default): SHOW INDEX FROM `SequelizeMeta`
Executing (default): SELECT `name` FROM `SequelizeMeta` AS `SequelizeMeta` ORDER BY `SequelizeMeta`.`name` ASC;
Serverless: Error while applying migrations
Serverless: Looking for migration that has problems...
Executing (default): CREATE TABLE IF NOT EXISTS `SequelizeMeta` (`name` VARCHAR(255) NOT NULL UNIQUE , PRIMARY KEY (`name`)) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE utf8_unicode_ci;
Executing (default): SHOW INDEX FROM `SequelizeMeta`
Executing (default): SELECT `name` FROM `SequelizeMeta` AS `SequelizeMeta` ORDER BY `SequelizeMeta`.`name` ASC;
Serverless: Something wrong with 20200728165728-init.js

目前，DB 是通過使用有時會鎖定表的 sequelize sync 來更新的。

import Sequelize from 'sequelize';
import mysql2 from 'mysql2';

const db = new Sequelize(
  process.env.DB_NAME,
  process.env.DB_USERNAME,
  process.env.DB_PASSWORD,
  {
    omitNull: true,
    dialect: process.env.DB_DIALECT,
    dialectModule: mysql2,
    dialectOptions: {
        supportBigNumbers: true
    },
    host: process.env.DB_HOST,
});

let synced = false;
const getSequelize = () => {
    if (!synced) {
        db.sync({ alter: true })
          .then(() => {
              console.log(`Database & tables synchronised!`)
          });

        synced = true;
    }

    return db;
}

export default getSequelize();

這些是包含在配置文件中的插件

plugins:
  - serverless-webpack
  - serverless-offline
  - serverless-pseudo-parameters
  - serverless-prune-plugin
  - serverless-sequelize-migrations

Answer 1

看起來你拼錯了migrations ？

錯誤消息說：

"migratins" is not a valid sub command. Run "serverless offline" to see a more helpful error message for this command.

Answer 2

解決方法非常簡單，

在serverless.yml文件中導入插件時，在主插件之前導入所有插件非常重要。

在這種情況下， serverless-sequelize-migrations是在 serverless serverless-offline之后導入的

所以工作解決方案是：

plugins:
  - serverless-webpack
  - serverless-sequelize-migrations
  - serverless-offline
  - serverless-pseudo-parameters
  - serverless-prune-plugin

這個遷移是用下一個命令執行的

serverless migrations up