Sequelize模型关联不会创建新列 [英] Sequelize model association won't create a new column

问题描述

为什么在我的某些模型中，序列化不会为外键创建新列?但是它确实为其他模型创建了吗???令人沮丧和奇怪.例如，在此用户模型中，续集不会创建role_id.

Why is it that in some of my models, sequelize WON’T create a new column for foreignkey? BUT it does create for other models??? It’s frustrating and weird. For instance, in this User model, sequelize won’t create role_id.

'use strict';
module.exports = (sequelize, DataTypes) => {
  const User = sequelize.define('User', {
    id: { type: DataTypes.BIGINT, allowNull: false, autoIncrement: true, unique: true, primaryKey: true },
    first_name: DataTypes.STRING,
    last_name: DataTypes.STRING
  }, {});
  User.associate = function(models) {
    User.belongsTo(models.Role, { foreignKey: 'role_id' });
  };
  return User;
};

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这是一个类似的问题:续集未创建模型关联列但！没有回答.

---

This is a similar question: Sequelize not creating model association columns BUT! It wasn't answered.

我已经花了几个小时，我所做的一切都像这样:

I've spent hours on this, I did everything like:

1. 仔细阅读以下内容: https://sequelize.org/master/manual/assocs.html
2. 进行实验，就像创建一个新的虚拟模型一样，其名称为NewUser.有用！但是同样没有User名称.
3. 发布在Sequelize的Slack频道上.

1. Reading this thoroughly: https://sequelize.org/master/manual/assocs.html
2. Experimenting, like creating a new dummy model, with name NewUser. It works! But again not with User name.
3. Posted on Sequelize's Slack channel.

在出现Stackoverflow问题之后，我将在其Github的问题页面上寻求帮助.

After this Stackoverflow question, I will seek help from their Github's issue page.

我想我可以只定义列role_id而不是通过associate函数添加它.

I'm thinking I can just define the column role_id instead of adding it through the associate function.

推荐答案

感谢Anatoly跟踪我关于Sequelize这样的问题.

Thanks to Anatoly for keeping up with my questions about Sequelize like this.

经过多次试验和错误，我发现问题是由我的路线注册引起的，例如:

After so many trials and errors, I figured that the issue was caused by the registration of my routes like:

require("./app/routes/user/user.routes")(app)

在我的 app.js 或 server.js 中.这些路线注册是在 db.sync ！

in my app.js or server.js. These routes registration was added before the db.sync!

所以我要做的是，我在 db.sync 之后称这些路由注册，如下所示:

So what I did was, I call these routes registration after that db.sync, like so:

const db = require("./app/models")

if (process.env.NODE_ENV === "production") {
  db.sequelize.sync().then(() => {
    useRoutes()
  })
} else {
  db.sequelize.sync({ force: true }).then(() => {
    console.log("Drop and re-sync db.")
    useRoutes()
  })
}

function useRoutes() {
  console.log("Use routes...")
  require("./app/routes/user/user.routes")(app)
  require("./app/routes/auth/auth.routes")(app)
}

Voila，固定！

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