Creating instance with an association in Sequelize

Question

Using Sequelize, I\'ve created two models: User and Login.

Users can have more than one Login, but a login must have exactly one user, which me

Answer 1

You have association between User an Login with constraint allowNull at false. You must create Login before User or set allowNull at true in model and the table to DB (LoginId Null constraint)

var User = sequelize.define('User', {});
var Login = sequelize.define('Login', {});
Login.belongsTo(User, {
  onDelete: 'cascade',
  foreignKey: {
    field: 'userId',
    allowNull: false,
  }
});

Solution

Login.create({
   username: "username",
   User: {...}
},{
   include: User
})