Problem notNull Violation in Sequelize and Associations (hasMany and belongsTo)

[José Imaz]

I have a problem with Sequelize. For simplicity, I have two models

```User``` and ```EmailAddress```

The definition of each one is:

**User**

```

sequelize.define('User', {

        idUser: {

            type: DataTypes.INTEGER,

            field: 'IdUser',

            allowNull: false,

            primaryKey: true,

            autoIncrement: true

        },

....

const EmailAddress = model.EmailAddress;

    User.hasMany(EmailAddress, {

        as: 'EmailAddresses',

        foreignKey: 'IdUser',

        onDelete: 'NO ACTION',

        onUpdate: 'NO ACTION'

    });

```

**EmailAddress**

```

sequelize.define('EmailAddress', {

        idEmailAddress: {

            type: DataTypes.INTEGER,

            field: 'IdEmailAddress',

            allowNull: false,

            primaryKey: true,

            autoIncrement: true

        },

        idUser: {

            type: DataTypes.INTEGER,

            field: 'IdUser',

            allowNull: false,

            references: {

                model: 'Users',

                key: 'IdUser'

            },

            onUpdate: 'NO ACTION',

            onDelete: 'NO ACTION'

        },

...

    const EmailAddress = model.EmailAddress;

    const User = model.User;

    EmailAddress.belongsTo(User, {

        as: 'User',

        foreignKey: 'IdUser',

        onDelete: 'NO ACTION',

        onUpdate: 'NO ACTION'

    });

```

Now, I when I want insert a register in both tables, with the next code

```

var oBaseIncludes = [{

    model: models.EmailAddress,

    as: 'EmailAddresses'

}]

var SavedUser = await models.User.create(oUser, {

    include: oBaseIncludes,

    transaction: t,

    logging: console.log

});

```

For simplicity oUser is a object with all the User info and 

```

            user.EmailAddresses = [{ 

                default : true,

                token : user.UserMemoToken

            }];

```

Sequelize throw an error **message:'notNull Violation: EmailAddress.idUser cannot be null'**

**But. If I add the line (before save the User)**

```

oUser.EmailAddresses[0].idUser = -1;

```

**This works!** (insert in both tables correctly, and not with idUser = -1)

It seems that Sequelize cannot set idUser in EmailAddresses. It seems that Sequelize cannot connect both models.

I hope anyone can help me!

Thanks in advance!