续集 - 类型错误：无法读取未定义的属性'define'

Question

>编辑：我的代码中有一行被省略在我的示例中，它已被添加并带有注释。

我正在为一个新项目设置服务器，并尝试自 v5 以来首次使用 Sequelize。运行我的服务器时，会抛出此错误。

/Users/me/dev/projects/my-project/node_modules/sequelize/lib/model.js:730
options = Utils.merge(_.cloneDeep(globalOptions.define), options);
^
TypeError: Cannot read property 'define' of undefined
at Function.init (/Users/me/dev/projects/my-project/node_modules/sequelize/lib/model.js:730:53)
at Object.<anonymous> (/Users/me/dev/projects/my-project/src/server/db/models/user.js:16:6)
at Module._compile (internal/modules/cjs/loader.js:736:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:747:10)
...

调用模型定义初始化期间发生错误：

const sequelize = require("../_db");
...
console.log('this runs');
class User extends Sequelize.Model {} // edit: this line was here
User.init(
{
avatar: {
default: {
type: Sequelize.URL,
value: defaultAvatar
},
type: Sequelize.STRING
},
email: {
allowNull: false,
type: Sequelize.STRING,
unique: true
},
id: {
defaultValue: Sequelize.UUIDV1,
primaryKey: true,
type: Sequelize.UUID
},
name: {
type: Sequelize.STRING
},
password: {
allowNull: false,
get() {
return () => this.getDataValue("password");
},
type: Sequelize.STRING
},
salt: {
get() {
return () => this.getDataValue("salt");
},
type: Sequelize.STRING
}
},
{ sequelize, modelName: "user" }
);
console.log('this doesn't);

这对我来说很神秘，我不太确定可能出了什么问题。

Answer 1

您需要包含用户的类定义。 我在您提供的代码中看不到它。 这可以解释为什么错误说它来自"未定义">

即

const Model = Sequelize.Model;    
class User extends Model {}

你可以做：

class User extends Sequelize.Model {}

看这里： https://sequelize.org/master/manual/models-definition.html

此外，看起来您使用的是 Sequelize 的默认模型加载器，您需要在

module.exports = (sequelize, DataTypes) => {
const User = sequelize.define("User", {
});
return User
};