Question

我是节点新手。

我正在尝试使用cosign在我的简单应用程序中添加Sequelize。

配置/ db.js

var Sequelize = require('sequelize');

var sequelize = new Sequelize('test', 'root', '', {

host: 'localhost',
dialect: 'mysql',

 pool: {
max: 5,
min: 0,
idle: 10000
}

});

module.exports = function () {
return sequelize
}

模型/ user.js的

var Sequelize = require('sequelize');

module.exports = function(application, req, res){

var User = sequelize.define('user', {
username: {
type: Sequelize.STRING,
}
}, {
freezeTableName: true // Model tableName will be the same as the model name
});

User.create({ username: 'fnord'})
.then(function() {
console.log('criado!');
})
}

config / server.js

...
consign()
.include('app/routes')
.then('config/db.js')
.then('app/models')
.then('app/controllers')
.into(app);

module.exports = app;

我收到错误sequelize is not defined´ on var User = sequelize.define（'user'，{`

我做错了什么？

Answer 1

在你的moldes文件夹中创建一个index.js文件，如下所示：

"use strict";

var fs        = require("fs");
var path      = require("path");
var Sequelize = require("sequelize");

var sequelize = new Sequelize(global.config.dbConfig.name, global.config.dbConfig.user, global.config.dbConfig.password, {
  host: global.config.dbConfig.host,
  port: global.config.dbConfig.port,
  pool: false
});

var db = {};

fs.readdirSync(__dirname)
  .filter(function(file) {
    return (file.indexOf(".") !== 0) && (file !== "index.js");
  })
  .forEach(function(file) {
    var model = sequelize.import(path.join(__dirname, file));
    db[model.name] = model;
  });

Object.keys(db).forEach(function(modelName) {
  if ("associate" in db[modelName]) {
    db[modelName].associate(db);
  }
});

db.sequelize = sequelize;

module.exports = db;

并在您的user.js中执行以下操作：

module.exports = function(sequelize, DataTypes) {
  var User = sequelize.define("User", {
    username: {
      type: DataTypes.STRING
    }, 
    {
      freezeTableName: true // Model tableName will be the same as the model name 
    }
  });

  return User;
}

http://docs.sequelizejs.com/en/1.7.0/articles/express/

Answer 2

您应该要求将sequelize实例添加到用户模型中

配置/ db.js

module.exports = sequelize;

模型/ user.js的

var Sequelize = require('sequelize');
var sequelize = require('../config/db.js'); //sequelize instance

module.exports = function(application, req, res){

var User = sequelize.define('user', { 
...

Answer 3

对于使用Sequelize的项目，Sequelize-CLI是非常有用的工具。下载时

npm install -g sequelize-cli

然后您可以运行

sequelize init

上面的命令将为您写出一些文件夹，包括一个具有Ricardo上面创建的索引文件的models文件夹。这也提供了一些非常酷的环境配置。在new models文件夹中，您可以使用语法...使用对象创建新文件...

module.exports = function(sequelize, DataTypes) {
  var User = sequelize.define("User", {
    username: {
      type: DataTypes.STRING
    }, 
    {
      freezeTableName: true // Model tableName will be the same as the model name 
    }
  });

  return User;
}

虽然我确实喜欢将此作为工具。在此关键要注意，Sequelize会去寻找define()方法的第一个参数。这样我们就可以写

module.exports = function(sequelize, DataType){
return sequelize.define("User", {
    username: {
      type: DataTypes.STRING
    }, 
    {
      freezeTableName: true // Model tableName will be the same as the model name 
    }
  });

sequelize没有定义 - Sequelize和consign

3 个答案: