Sequelize：跨多个数据库的关系时“模型尚未定义”答案

【问题标题】：Sequelize: "Model has not been defined" when relationship across multiple databasesSequelize：跨多个数据库的关系时“模型尚未定义”
【发布时间】：2020-05-22 05:03:46
【问题描述】：

我正在尝试为每个数据库实例化一个续集。 DB1 中的某些表与 DB2 中的表有关系，并且是相反的。其中一个关系是 DB1.Utilisateur.contenuProvenance_id => DB2.Contenu.id 和 DB2.Contenu.utilisateur_id => DB1.Utilisateur.id。

这是 Utilisateur 模型：

@Table
export default class Utilisateur extends Model<Utilisateur> {

    @API() @PrimaryKey @AutoIncrement @Column({ type: DataType.INTEGER })
    public id!: number;

    @Column({ type: DataType.STRING, allowNull: false })
    public email!: string;

    @Column({ type: DataType.STRING, allowNull: false })
    public nom!: string;

    @ForeignKey(() => Utilisateur)
    @Column({ type: DataType.INTEGER, allowNull: true })
    public parrain_id?: number;

    @ForeignKey(() => Contenu)
    @Column({ type: DataType.INTEGER, allowNull: true })
    public contenuProvenance_id?: number;
}

（是的，我正在使用 sequelize-typescript 将我的模型声明为 Typescript 类）

以下是我的 Sequelize 实例的创建方式：

let DBs = {};
for (const ZONE of zones)
    DBs[ ZONE.name ] = new Sequelize(ZONE.serveur.bdd.nom, ZONE.serveur.bdd.login, ZONE.serveur.bdd.mdp, {
        host: ZONE.serveur.bdd.hote,
        dialect: "mariadb",
        ...
        models: ZONE.modeles // Array of models
    });

问题：创建第一个实例（DB1）时，sequelize 找不到 Content 表并给我这个错误：

Error: Contenu has not been defined
    at Sequelize.model (project/node_modules/sequelize/lib/sequelize.js:443:13)
    at Sequelize.model (project/node_modules/sequelize-typescript/dist/sequelize/sequelize/sequelize.js:29:26)
    at project/node_modules/sequelize-typescript/dist/sequelize/sequelize/sequelize.js:51:46
    at Array.forEach (<anonymous>)
    at project/node_modules/sequelize-typescript/dist/sequelize/sequelize/sequelize.js:49:26
    at Array.forEach (<anonymous>)
    at Sequelize.associateModels (project/node_modules/sequelize-typescript/dist/sequelize/sequelize/sequelize.js:45:16)
    at Sequelize.addModels (project/node_modules/sequelize-typescript/dist/sequelize/sequelize/sequelize.js:37:14)
    at new Sequelize (project/node_modules/sequelize-typescript/dist/sequelize/sequelize/sequelize.js:19:22)

虽然数据库之间有关系，但是否可以一一创建sequelize实例？

我应该在创建所有 sequelize 实例后添加模型吗？

感谢你们的帮助