Question

TypeError：无法读取未定义的属性'findAll'

findAll函数出错，但是Connection成功。
并且还以名称managers创建数据库。

app.js
型号
- index.js
bin
- www.js

models / index.js

const { Sequelize } = require('sequelize');

const manager = new Sequelize({
    dialect: 'mariadb',
    host: '127.0.0.1',
    port: '13306',
    username: 'xxx',
    password: 'xxx',
    database: 'test',
    timezone: 'Asia/Seoul'
});

require('./maria/manager.model')(manager);

module.exports=manager;

models / maria / manager.model.js

const { DataTypes } = require('sequelize');

module.exports = (sequelize) => {
     sequelize.define('manager', {
        id: {
            allowNull: false,
            autoIncrement: true,
            primaryKey: true,
            type: DataTypes.INTEGER
        },
        name: {
            allowNull: false,
            type: DataTypes.STRING,
        }
    }, {timestamps: true }).sync({force:false});
};

app.js

const express = require('express');
const app = express();

const db = require('./models');
console.log(`Checking database connection...`);

// It works!
db.authenticate().then(()=>{
  console.log('Database connection OK!');
});

// It makes error!
const find_test = db.manager.findAll();
console.log(find_test);

Answer 1

首先包含manager变量的内容是什么？您的manager变量包含连接序列。您的目标是请求表manager，但不能使用变量来请求它。因为他不包含表规范，但包含数据库连接。

const { DataTypes } = require('sequelize');

module.exports = (sequelize) => {
     return sequelize.define('manager', {
        id: {
            allowNull: false,
            autoIncrement: true,
            primaryKey: true,
            type: DataTypes.INTEGER
        },
        name: {
            allowNull: false,
            type: DataTypes.STRING,
        }
    }, {timestamps: true });
};

在此文件中，您需要返回表的定义。

const { Sequelize } = require('sequelize');

const manager = new Sequelize({
    dialect: 'mariadb',
    host: '127.0.0.1',
    port: '13306',
    username: 'xxx',
    password: 'xxx',
    database: 'test',
    timezone: 'Asia/Seoul'
});

const myTable = require('./maria/manager.model')(manager);

module.exports= {
  manager, myTable
};

在此文件中，您需要将返回值存储在变量中并导出。

const express = require('express');
const app = express();

const { manager, myTable }= require('./models');
console.log(`Checking database connection...`);

// It works!
manager.authenticate().then(()=>{
  console.log('Database connection OK!');
});


const find_test = myTable.findAll();
console.log(find_test);

最后在下一个文件中，导入新的导出变量！享受吧！

Answer 2

app.js
序列化
- 型号
  - manager.model.js
- index.js

app.js

const maria = require('./sequelize');
const { models } = require('./sequelize');

console.log(`Checking database connection...`);
maria.authenticate()
    .then(()=>{
      console.log('Database connection OK!');
    });

const test = models.manager.findOne()

sequelize / index.js

const { Sequelize } = require('sequelize');

const maria = new Sequelize({
    dialect: 'mariadb',
    host: '127.0.0.1',
    port: '13306',
    username: 'xxxx',
    password: 'xxxx',
    database: 'test',
    timezone: 'Asia/Seoul'
});

require('./models/manager.model')(maria)

module.exports=maria;

TypeError：无法读取未定义的属性“ findAll”（mariaDB，ExpressJs）

2 个答案: