sequelize: relations in both directions needed?

Question

I have two existing tables in my database: "user" with the columns "id" and "depId" and "department" with "id" and "name". (user.depId ist the foreign key for department.id)

Now I'd like to create a sequelize model for this.

I already added this

User.belongsTo (Department, { foreignKey: 'depId', targetKey: 'id'});

Do I have to add this also:

Department.HasMany(User)

or is one direction enough to work properly?

Answer 1

sequelize: relations in both directions needed?

Depends

---

So here we go :

User.belongsTo (Department, { foreignKey: 'depId', targetKey: 'id'});

This will help you to get Department via User via sequelize association ,

---

Department.HasMany(User)

But this what you need if you want to get User via Department via sequelize association

So define any one of it if you just gonna needed one , but best practice is to define both way.