While out of the box Sequelize will seem a bit opinionated it's trivial to both legacy and forward proof your application by defining (otherwise generated) table and field names.

Tables

sequelize.define('user', { }, { tableName: 'users' }); 

Fields

sequelize.define('modelName', { userId: { type: Sequelize.INTEGER, field: 'user_id' } }); 

Primary keys

Sequelize will assume your table has a id primary key property by default.

To define your own primary key:

sequelize.define('collection', { uid: { type: Sequelize.INTEGER, primaryKey: true, autoIncrement: true // Automatically gets converted to SERIAL for postgres } }); sequelize.define('collection', { uuid: { type: Sequelize.UUID, primaryKey: true } }); 

And if your model has no primary key at all you can use Model.removeAttribute('id');

Foreign keys

// 1:1 Organization.belongsTo(User, {foreignKey: 'owner_id'}); User.hasOne(Organization, {foreignKey: 'owner_id'}); // 1:M Project.hasMany(Task, {foreignkey: 'tasks_pk'}); Task.belongsTo(Project, {foreignKey: 'tasks_pk'}); // N:M User.hasMany(Role, {through: 'user_has_roles', foreignKey: 'user_role_user_id'}); Role.hasMany(User, {through: 'user_has_roles', foreignKey: 'roles_identifier'});