api_extr/src/data-storage/db/index.ts

import SequelizeDbConnector from "../../frameworks/sequelize";
import createGenericExtrModel from "../../frameworks/sequelize/models/generic-extr";

export default class Db {
  private _sequelizeDbConnector: SequelizeDbConnector;

  constructor(noInit = false) {
    if (!noInit) {
      this.initSequelizeDbConnector();
    }
  }

  private async initSequelizeDbConnector() {
    await new Promise((resolve, reject) => {
      SequelizeDbConnector.instance.ready.subscribe({
        complete: () => {
          this._sequelizeDbConnector = SequelizeDbConnector.instance;
          resolve(true);
        },
        error: (err) => {
          reject(err);
        }
      });
    });
  };

  public models() {
    return this._sequelizeDbConnector.sequelize.models;
  }

  public async defineModel(modelName: string) {
    await createGenericExtrModel(this._sequelizeDbConnector.sequelize, modelName);
  }
}