passthrough

Associations in dream can be defined with a passthrough constraint. This means that the only way these associations can be loaded is if data is passed through using a passthrough method. This can be useful for, i.e., localization patterns, where the locale changes for each user, and is driven by headers in a request.

export default class Post extends ApplicationModel {
  @deco.HasOne('LocalizedText', {
    polymorphic: true,
    foreignKey: 'localizableId',
    where: { locale: DreamConst.passthrough },
  })
  public currentLocalizedText: LocalizedText[]
}

const reloadedUser = await user
  .passthrough({ locale: 'es-ES' })
  .load('posts', 'currentLocalizedText')
  .execute()