sequelize:连接多个数据库

需要为每一个数据库连接创建sequelize不同的情况下，你要创建：

const Sequelize = require('Sequelize'); 
const userDb = new Sequelize(/* ... */); 
const contentDb = new Sequelize(/* ... */); 

此播放sequelize创建的每个实例都有自己的数据库信息，因此无法使用一个sequelize实例创建多个连接。
config.json

{ 
    /*...*/ 
    databases: { 
     user: { 
      path: 'xxxxxxxx' 
     }, 
     content: { 
      path: 'xxxxxxxx' 
     } 
    } 
}

应用程序中的连接

const Sequelize = require('sequelize'); 
const config = require('./config.json'); 

const db = {}; 
const databases = Object.keys(config.databases); 
for(let i = 0; i < databases.length; ++i) { 
    let database = databases[i]; 
    let dbPath = config.databases[database]; 
    db[database] = new Sequelize(dbPath); 
} 

// Sequelize instances: 
// db.user 
// db.content