Question

我有一个深层嵌套的数据对象，它从我的API返回，看起来像下面的JSON。

我正在使用Redux工具包的createSlice创建一个trip的切片

因此，目前在我的createSlice中，我想存储一系列旅行。

我还希望能够更新单个行程或行程的一部分

例如，假设我要更新旅行项目的开始日期
或者，假设我要更新旅行项目的会员姓名

我的问题和疑虑：

我目前所有这些实体都返回到trip createSlice中，但是我不确定将这些实体标准化后是否将它们分成单独的createSlice？如果是这样，这是怎么做的？这是一种反模式吗？
应如何在initialState中定义嵌套实体？
我应该在initalState中定义所有规范化的实体吗？如果这样做的话，我想更新trip_item或trip_item_member时我的异径管会是什么样子？
我的标准化数据看上去是否“正确”？我已经省略了mergeStrategy和trips_items_members之间的trip_members，我知道我应该这样做，但是还没有弄清楚它是如何工作的，或者在这里是否有必要？

注意：

RTK文档here中有一个示例，显示createSlice与3个单独的实体一起使用，这些实体最初来自1个API调用。看起来好像是3个独立的文件，但尚不清楚它们之间如何共享数据。

这就是我的旅行createSlice的样子

/**
 * Get trip by ID action
 */
export const getTripByID = createAsyncThunk(
  'trips/getTripByID',
  async ({ uid }) => {
    const response = await findOne(uid)
    const normalized = normalize(response, trip)
    return normalized.entities
  },
)

const tripsAdapter = createEntityAdapter({
  selectId: entity => entity.trip_id,
  sortComparer: (a, b) => b.start_date.localeCompare(a.start_date),
  loading: '',
  error: '',
  data: [],
})

export const {
  selectById: selectTripById,
  selectIds: selectTripIds,
  selectEntities: selectTripEntities,
  selectAll: selectAllTrips,
  selectTotal: selectTotalTrips,
} = tripsAdapter.getSelectors(state => state.trip)


const initialState = tripsAdapter.getInitialState()

const tripSlice = createSlice({
  name: 'trips',
  initialState,
  extraReducers: builder => {
    builder.addCase(getAllTrips.fulfilled, (state, { payload }) => {
      tripsAdapter.upsertMany(state, payload)
      state.loading = false
    })
    builder.addCase(getTripByID.fulfilled, (state, { payload }) => {
      console.log('payload', payload)
      tripsAdapter.upsertMany(state, payload)
      state.loading = false
    })
  },
})

export default tripSlice.reducer

从await findOne(uid)返回的

API响应

{
    created_by: "6040c2d1-ea57-43b6-b5f2-58e84b220f4e",
    deleted_by: null,
    destination: "Valencia",
    end_date: "2020-10-04",
    start_date: "2020-09-27",
    trip_id: "34a620e8-51ff-4572-b466-a950a8ce1c8a",
    uid: "14047a5b-2fe5-46c9-b7f2-e9b5d14db05b",
    updated_by: null,
    trip_items: [
        {
            destination: "Mezzanine Level Shivaji Stadium Metro Station, Baba Kharak Singh Rd, Hanuman Road Area, Connaught Place, New Delhi, Delhi 110001, India",
            end_date: "2020-09-28",
            end_time: "2020-09-28T01:20:15.906Z",
            note: null,
            start_date: "2020-09-28",
            start_time: "2020-09-28T01:20:15.906Z",
            trip_item_id: "bd775be7-2129-42c0-a231-5a568b0f565d",
            trips_items_members: [
                {
                    trip_item_member_id: "76b54a80-4d09-4768-bc5a-4d7e153e66dc", 
                    uid: "4b88f9af-8639-4bb0-93fa-96fe97e03d02", 
                }
            ],
            uid: "e5f81a6d-1a0d-4456-9d4e-579e80bc27d8",
        }
    ],
    trips_members: [
        {
            trip_member_id: "76b54a80-4d09-4768-bc5a-4d7e153e66dc", 
            uid: "4b88f9af-8639-4bb0-93fa-96fe97e03d02", 
            role: "ADMIN"
        }
    ]
}

这是我的normalizr模式


const tripItemMember = new schema.Entity(
  'trips_items_members',
  {},
  { idAttribute: 'trip_item_member_id' },
)

const tripItem = new schema.Entity(
  'trips_items',
  {
    trips_items_members: [tripItemMember],
  },
  {
    idAttribute: 'trip_item_id',
  },
)

const tripMember = new schema.Entity(
  'trips_members',
  {},
  {
    idAttribute: 'trip_member_id',
  },
)

export const trip = new schema.Entity(
  'trip',
  {
    trips_items: [tripItem],
    trips_members: [tripMember],
  },
  {
    idAttribute: 'trip_id',
  },
)

这是normalizr的输出

trip: {
  "34a620e8-51ff-4572-b466-a950a8ce1c8a": {
    created_by: "6040c2d1-ea57-43b6-b5f2-58e84b220f4e"
    deleted_by: null
    destination: "Valencia"
    end_date: "2020-10-04"
    start_date: "2020-09-27"
    trip_id: "34a620e8-51ff-4572-b466-a950a8ce1c8a"
    trips_items: ["bd775be7-2129-42c0-a231-5a568b0f565d"]
    trips_members: ["76b54a80-4d09-4768-bc5a-4d7e153e66dc"]
    uid: "14047a5b-2fe5-46c9-b7f2-e9b5d14db05b"
    updated_by: null
  }
}

trips_items:{
  "0a56da0f-f13b-4c3d-896d-30bccbe48a5a": {
    destination: "Mezzanine Level Shivaji Stadium Metro Station"
    end_date: "2020-09-28"
    end_time: "2020-09-28T01:20:15.906Z"
    note: null
    start_date: "2020-09-28"
    start_time: "2020-09-28T01:20:15.906Z"
    trip_item_id: "0a56da0f-f13b-4c3d-896d-30bccbe48a5a"
    trips_items_members: []
    uid: "25d20a9d-1eb9-4226-926d-4d743aa9d5dc"
  }
}

trips_members: {
  "76b54a80-4d09-4768-bc5a-4d7e153e66dc": {
    role: "ADMIN"
    trip_member_id: "76b54a80-4d09-4768-bc5a-4d7e153e66dc"
    uid: "4b88f9af-8639-4bb0-93fa-96fe97e03d02"
  }
}

Answer 1

您的设置非常类似于redux-toolkit文档中的this detailed example。他们正在获取articles，但是每篇文章都带有嵌入的users和comments。它们为三个实体中的每个实体定义单独的切片。

comments切片没有任何动作或归约方法，但使用extraReducers属性来响应文章收到的动作并存储嵌入的注释。

const commentsAdapter = createEntityAdapter();

export const slice = createSlice({
  name: "comments",
  initialState: commentsAdapter.getInitialState(),
  reducers: {},
  extraReducers: {
    [fetchArticle.fulfilled]: (state, action) => {
      commentsAdapter.upsertMany(state, action.payload.comments);
    }
  }
});

fetchArticle动作由article片“拥有”，但是动作有效负载包含所有三种类型的实体。 所有切片均接收所有操作，因此comments和users能够以自己的逻辑来响应此操作。每个切片都不会影响其他切片的工作。

在您的情况下，您想为items和members创建切片。您希望不按实体类型来键入有效负载，而不用调用upsertMany(state, payload)。这样您就可以调用upsertMany(state, payload.members)。

Redux-createSlice

1 个答案: