Question

我有这个Sequelize Code用于连接我的数据库

var sequelize = new Sequelize('db-name', 'user', 'pwd', {
    host: 'XXX.XX.XX.XXX',
    dialect: 'mysql',

    pool: {
        max: 50,
        min: 0,
        idle: 1000000
    },
});

我把它包装在下面的模块中

var express = require('express');
var app = module.exports = express();
var Sequelize = require('sequelize');


module.exports = function (Sequelize, DataTypes) {
    return new Sequelize('db-name', 'user', 'pwd', {
        host: 'XXX.XX.XX.XXX',
        dialect: 'mysql',
        pool: {
            max: 50,
            min: 0,
            idle: 1000000
        },
    });
};

但是，当我在下面调用此代码时：

var sequelize = require('../../Connection.js');
//load model
var City = sequelize.import('../../models/City.js');

它给我一个错误说 - undefined不是一个函数。基本上，当我导入模块时它无法实例化sequelize对象

但是，当我将这些块放在一个页面中时，一切正常

我的核心要求 - 我希望在我的节点应用中使用单个连接对象。我在各种页面中模块化了Express Routes。

Answer 1

Your sequelize module exports a function, which returns sequelize. You have to actually call that function

var sequelize = require('../../Connection.js')() <-- ;

Remember to cache the instance in connection.js - otherwise you get a new connection each time. You can also export the instance directly:

module.exports = new Sequelize('db-name', 'user', 'pwd', {
    host: 'XXX.XX.XX.XXX',
    dialect: 'mysql',
    pool: {
        max: 50,
        min: 0,
        idle: 1000000
    },
});

Sequelize Single Instance - 在Module.exports

1 个答案: