Question

我有两个类PizzasState和ToppingsState。 PizzaState已经具有选择器来选择披萨。

@State<PizzaStateModel>({
  name: 'pizzas',
  defaults: initialState
})
export class PizzasState {
  constructor(private pizzaService: PizzasService) {
  }

  @Selector([RouterState])
  static getSelectedPizza(
    state: PizzaStateModel,
    routerState: RouterStateModel<RouterStateParams>
  ): Pizza {
    const pizzaId = routerState.state && routerState.state.params.pizzaId;
    return pizzaId && state.entities[pizzaId];
  }

  @Selector()
  getPizzaVisualized(state: PizzaStateModel): Pizza {
    //
    // what is here?
    //
  }
}

并且ToppingsState选择了Toppings

@State({
  name: 'toppings',
  defaults: initialState
})
export class ToppingsState {
  constructor(private toppingsService: ToppingsService) {
  }

  @Selector()
  static selectedToppings(state: ToppingsStateModel): number[] {
    return state.selectedToppings;
  }

现在，我想将选定的比萨与选定的配料一起加入，并获得可视化的比萨。

如何正确重用getSelectedPizza和getSelectedToppings？谢谢

Answer 1

您似乎需要使用joining selector。

@Selector([ToppingsState.selectedToppings])
getPizzaVisualized(state: PizzaStateModel, selectedToppings: number[]): Pizza {
    // User data from both states.
}

重用NGXS中其他选择器中的选择器

1 个答案: