Message.Create 不是函数 sequelize cli

Question

我已经在我的项目中安装了 mysql sequelize 然后我使用创建模型和迁移文件的 sequelize 命令创建了消息模型。我还在 config.json file.Now 中提供了数据库凭据我我试图在我的数据库中插入记录，但这里出现此错误是我的模型文件

DO i need to make db connection explicitly or it auto picks the credential from config.json file to make connection ?

models/messages.js

'use strict';
module.exports = (sequelize, DataTypes) => {
var Messages = sequelize.define('Messages', {
 room: DataTypes.STRING,
nickname: DataTypes.STRING,
message: DataTypes.STRING,
receiver: DataTypes.STRING
 }, {
classMethods: {
  associate: function(models) {
    // associations can be defined here
  }
}
});
 return Messages;
};

这里是 config.json 文件 config/config.json

{
"development": {
"username": "root",
"password": "asad",
"database": "chat",
"host": "127.0.0.1",
"dialect": "mysql"
},
"test": {
"username": "root",
"password": null,
"database": "database_test",
"host": "127.0.0.1",
"dialect": "mysql"
 },
"production": {
"username": "root",
"password": null,
"database": "database_production",
"host": "127.0.0.1",
"dialect": "mysql"
 }
}

这是我保存记录的服务器文件 app.js 文件

 var express = require('express');
 var router = express.Router();
  var app = express();
 var server = require('http').createServer(app);
 server.listen(4000);
 var Messages=require('../models/Messages.js');

router.post('/', function(req, res, next) {
  var a =req.body;

 Messages.create(a).then(() => {

  console.log('success ')

})
 })

Answer 1

制作sequelize连接实例并导出，请根据您的环境使用配置

const sql = new Sequelize(config.database, config.username, config.password, {
  host: config.host,
  dialect: config.dialect,
  pool: {
    max: 5,
    min: 0,
    idle: 10000
  },

});
module.export = sql;

在您的 app.js 中导入 sql 实例并在启动服务器之前连接您的数据库。

var express = require('express');
var router = express.Router();
var app = express();
var server = require('http').createServer(app);
var sql = require(./sql);
sql.authenticate().then(()=>{
   server.listen(4000);
});

var Messages= sql.import('../models/Messages.js');

router.post('/', function(req, res, next) {
  var a =req.body;

 Messages.create(a).then(() => {

  console.log('success ')

})
})

Message.Create 不是函数 sequelize cli

Message.Create is not a function sequelize cli

mysql

node.js

express

sequelize.js

sequelize-cli