动态参数ngrx选择器

Question

我在这里有点挣扎 我有以下选择器

export const selectMoMenuInfoByIdDynamic = createSelector(
selectMoMenuState,
state => (meId: string) => {
let currentMenu: MoMenu
console.log(state.MoMenuItems)
currentMenu = state.MoMenuItems.find(element => {
return element.ME_ID === meId
})
return currentMenu
}
)

但是当我调用它时无法让它工作

const moMenu = this.store.pipe(
select(selectMoMenuInfoByIdDynamic),
map(res => res(meId))
)
console.log(moMenu)

对我有什么想法吗？

会有很大帮助 提前致谢

Answer 1

有几种方法可以创建参数化选择器，每种方法都有一个用例。 请参阅我的帖子 Parameterized selectors 了解更多信息。

export const getCount = () => createSelector(
  getCounterValue,
  (counter, props) => counter * props.multiply,
)

// in components:

this.counter = this.store.pipe(select(fromRoot.getCount, { multiply: 2 }))

---

export const selectCustomer = (id: string) =>
  createSelector(
    selectCustomers,
    customers => customers[id],
  )

// in component

this.customer = store.pipe(select(customers.selectCustomer('47')))