Question

我已经成功地将 Sequelize ORM与Express Js集成在一起，但是我很想在续集中迁移db。有什么帮助吗？

var express = require('express');
var Sequelize = require('sequelize');
var bodyParser =  require('body-parser');
var app = express();

app.use(bodyParser.urlencoded({extended: false}));
app.use(bodyParser.json());

var router = express.Router();
var sequelize = new Sequelize('tousif', 'root', 'root', {
  host: 'localhost',
  dialect: 'mysql'
});

Answer 1

要使用CLI，您需要安装相应的软件包：

npm install --save sequelize-cli

有关可用命令的更多详细信息可以通过help命令获得：

$ sequelize help:init
$ sequelize help:db:migrate
$ sequelize help:db:migrate:undo

有关详细信息，请使用此链接Sequelize

Answer 2

您是否已加载模型并同步数据库？您的代码并没有真正向我显示配置的其余部分只是连接字符串。

我建议在安装sequelize-cli后使用

$ sequelize help:model:create

它将告诉您如何创建模型。

您必须导入模型文件，关联方法，将这些模型与数据库同步。

  // Expose the connection function
  db.connect = function(database, username, password, options) {
  if (typeof db.logger === 'function')
    console.log("Connecting to: " + database + " as: " + username);

  // Instantiate a new sequelize instance
  var sequelize = new db.Sequelize(database, username, password, options);

  db.discover.forEach(function(location) {
    var model = sequelize["import"](location);
    if (model)
      db.models[model.name] = model;
  });

  // Execute the associate methods for each Model
  Object.keys(db.models).forEach(function(modelName) {
    if (db.models[modelName].options.hasOwnProperty('associate')) {
      db.models[modelName].options.associate(db.models);
      winston.info("Associating Model: " + modelName);
    }
  });

  if (config.db.sync) {
    // Synchronizing any model changes with database.
    sequelize.sync(
      //{ force: true } // use to drop before create
      ).then(function() {
        console.log("Database synchronized");
      }).catch(function(err) {
        console.log(err);
      });
  }
}

ExpressJs与续集

2 个答案: