Best Way to Keep UI Entities Synced?

[thatcort]

What's the best way to keep UIEntities synced with their corresponding entities?

I have UIEntities that track the selection state of my entities. When setEntities is called, I want to add new UIEntities with {selected: false} for only the new entities. For any existing entities, I want to retain the existing selection state. None of the entity mutation methods seem to do the trick. Any suggestions?

[thatcort]

Think I figured it out:

    store.combine({
      entities: store.pipe(selectAllEntities()),
      UIEntities: store.pipe(selectEntities({ref: UIEntitiesRef}))
    }).pipe(
      takeUntil(this.destroy$),
      unionEntities(),
      map(combined => combined.filter(c => c.selected === undefined).map(c => ({id: c.id, selected: false})))
    ).subscribe({
      next: newSelecteds => store.update(addEntities(newSelecteds, {ref: UIEntitiesRef}))
    })

That seems more complicated than it should be, though.