The Selector Map

Another lower level element returned by buildState is the selector map. Much like @ngrx/entity, the selector map is a simple object (associative array) that maps common names to selector functions.

export interface ISelectorMap<TParentState, TModel> {
  selectIds: MemoizedSelector<object | TParentState, EntityIdentity[]>;
  selectEntities: MemoizedSelector<object | TParentState, IEntityDictionary<TModel>>;
  selectAll: MemoizedSelector<object | TParentState, TModel[]>;
  selectTotal: MemoizedSelector<object | TParentState, number>;
  selectCurrentEntity: MemoizedSelector<object | TParentState, TModel>;
  selectCurrentEntityKey: MemoizedSelector<object | TParentState, EntityIdentity>;
  selectCurrentEntities: MemoizedSelector<object | TParentState, TModel[]>;
  selectCurrentEntitiesKeys: MemoizedSelector<object | TParentState, EntityIdentity[]>;
  selectCurrentPage: MemoizedSelector<object | TParentState, Page>;
  selectCurrentRange: MemoizedSelector<object | TParentState, Range>;
  selectTotalPageable: MemoizedSelector<object | TParentState, number>;
  selectIsLoading: MemoizedSelector<object | TParentState, boolean>;
  selectIsSaving: MemoizedSelector<object | TParentState, boolean>;
  selectIsDeleting: MemoizedSelector<object | TParentState, boolean>;
  selectLoadedAt: MemoizedSelector<object | TParentState, Date>;
  selectSavedAt: MemoizedSelector<object | TParentState, Date>;
  selectDeletedAt: MemoizedSelector<object | TParentState, Date>;
}

As with the IEntityState interface, we have attempted to maintain naming compatibility with @ngrx/entity here, however also as with IEntityState we provide a lot more than @ngrx/entity does as well. Selectors are available for every state property managed by NgRx Auto-Entity.