"TypeError: Cannot read property 'hasMany' of undefined" in TypeScript-CodePudding

I make so many tables and want to create realtionship between them. when I call the built in function of sequelize(orm) that is .hasMany . It give me the error. Cannot read the property of .hasMany of undefined.

companyModel.js

const sequelize = require("sequelize");
const companyDb = require("../../config/database");

const company1 = companyDb.define("company", {
  id: {
    type: sequelize.INTEGER,
    autoIncrement: true,
    primaryKey: true,
  },
  name: {
    type: sequelize.STRING,
    allowNull: false,
  },
  address: {
    type: sequelize.STRING,
    allowNull: false,
  },
  contact: {
    type: sequelize.STRING,
  },
  primay_email: {
    type: sequelize.STRING,
    allowNull: false,
  },
  website: {
    type: sequelize.STRING,
  },
  deleted_at: {
    type: sequelize.DATE,
  },
  is_deleted: {
    type: sequelize.BOOLEAN,
    defaultValue: false,
  },
  logo_url: {
    type: sequelize.STRING,
  },
  country: {
    type: sequelize.STRING,
    allowNull: false,
  },
});

module.exports = company1;

I make the relation in the below:

relation.js

const user = require("./usermodal");

const customerCompany = require("./customerCompanyModel");
const customer = require("./customerModel");
const invoiceItems = require("./invoiceItemsModel");
const outlet = require("./outletModel");
const outletStock = require("./outletStockModel");
const product = require("./productModel");
const role = require("./roleModel");
const invoice = require("./invoicesModel");
const { use } = require("../../routes");
const {company} = require("./companyModel");

const relationshipt   = company.hasMany(user);
user.belongsTo(company);
role.hasOne(user);
user.belongsTo(role);

company.hasMany(product);
product.belongsTo(company);

company.hasMany(outlet);
outlet.belongsTo(company);

company.hasMany(customerCompany);
customerCompany.belongsTo(company);

outlet.hasMany(user);
user.belongsTo(outlet);

outlet.hasMany(customerCompany);
customerCompany.belongsTo(outlet);

outlet.hasMany(invoice);
invoice.belongsTo(outlet);

outlet.hasMany(outletStock);
outletStock.belongsTo(outlet);

product.hasMany(outletStock);
outletStock.belongsTo(product);

product.hasOne(invoiceItems);
invoiceItems.belongsTo(product);

customer.hasMany(customerCompany);
customerCompany.belongsTo(customer);

customer.hasMany(invoice);
invoice.belongsTo(customer);

invoice.hasMany(invoiceItems);
invoiceItems.belongsTo(invoice)



module.exports = relations;

But it give me this error:

ERROR

CodePudding user response：

I think this is how you can fix it. Currently:

const {company} = require("./companyModel");

Should be (note removed curly bracers):

const company = require("./companyModel");

Code below is just to explain what happens, do not try to use it!

So, in your ./companyModel you export your model as the whole exports object:

module.exports = company1;

And later you include it with curly braces, which translates roughly to this:

const {company} = company1;
// or to put it differently:
const company = company1.company; // and this is the undefined value you get

With proper require statement it would look like this:

const company = company1; // that's your model, no more undefined