How to use @hasOne?

[zdev-online]

Issue

Versions

• sequelize: ^6.16.1
• sequelize-typescript: ^2.1.2
• typescript: ^4.5.5

Issue type

• [x] question
• [ ] feature request
• [ ] bug report

How to use @hasOne?

There are examples for @hasMany @belongsTo, but how to use @hasOne is unclear?

[sluchznak]

@zdev-online

From the official doc for sequelize:

The A.hasOne(B) association means that a One-To-One relationship exists between A and B, with the foreign key being defined in the target model (B).

The A.belongsTo(B) association means that a One-To-One relationship exists between A and B, with the foreign key being defined in the source model (A).

[zdev-online]

@zdev-онлайн

Из официального документа для продолжения:

Ассоциация A.hasOne(B) означает, что между A и B существует отношение «один к одному», при этом внешний ключ определяется в целевой модели (B).

Ассоциация A.belongsTo(B) означает, что между A и B существует отношение «один к одному», при этом внешний ключ определяется в исходной модели (A).

Can I have a sample code?

[stringang]

@zdev-online

There are many examples in the repository test/specs/association.spec.ts file

one of the examples:

@Table
class User extends Model {
  @Column
  name: string;

  @HasOne(() => Address, { foreignKey: 'userId' })
  address: any; // "any" because of order of execution (in separate classes this will work, I promise) 
}

@Table
class Address extends Model {
  @Column
  street: string;

  @Column
  zipCode: string;

  @Column
  city: string;

  @Column
  country: string;

  @ForeignKey(() => User)
  @Column
  userId: number;

  @BelongsTo(() => User)
  user: User;
}