How do I set up relationships in Sequelize with Node.js?

How do I set up relationships in Sequelize with Node.js?

To set up relationships in Sequelize, you can define associations like belongsTo, hasMany, and hasOne in your models.

Can you give me an example of a one-to-many relationship?

Sure! If you have a User model and a Post model, you can define it like this: User.hasMany(Post) and Post.belongsTo(User).

What about many-to-many relationships?

For many-to-many relationships, you need a junction table. For example, User.belongsToMany(Role, { through: 'UserRoles' }) and Role.belongsToMany(User, { through: 'UserRoles' }).

How do I query these relationships?

You can use include in your queries. For example: User.findAll({ include: Post }) to get users with their posts.