使用redux-api-middleware库中的createAction时出现未定义的“type”错误

bprjcwpo  于 2022-11-12  发布在  其他
关注(0)|答案(1)|浏览(148)

我尝试使用createAction函数,但遇到以下错误:

Uncaught Error: Actions may not have an undefined "type" property. Have you misspelled a constant?

我不知道为什么我会得到这个,但我假设它与中间件有关,但我也尝试过添加,它仍然不会工作。
这是我的商店的样子:

import { combineReducers, applyMiddleware, compose } from "redux";
import { configureStore } from "@reduxjs/toolkit";
import { routerMiddleware } from "react-router-redux";
import thunk from "redux-thunk";
import { apiMiddleware } from "redux-api-middleware";
import Immutable from "immutable";

import moduleReducers from "./reducers";
import routerReducer from "./reactRouterReducer";

export default function createStore(history, initialState) {
  const middlewares = [thunk, apiMiddleware, routerMiddleware(history)];
  const enhancers = compose(applyMiddleware(...middlewares));

  const reducer = combineReducers({
    router: routerReducer,
    ...moduleReducers,
  });

  const preLoadedState = Immutable.fromJS(initialState || {});
  return configureStore({
    reducer,
    preLoadedState,
    enhancers,
  });
}

这是我的减速器的样子:

import { createAction } from "redux-api-middleware";
import { createSelector } from "reselect";
import deep from "deep-get-set";
import config from "../config/config";

const SET_PROJECT = "SET_PROJECT";
const SET_PROJECTS = "SET_PROJECTS";
const SET_LOADING = "SET_LOADING";
const SET_ERROR = "SET_ERROR";

const initialState = {
  isLoading: false,
  hasError: false,
  user_projects: null,
  project: null,
};

export const fetchProjectsList = () =>
  createAction({
    endpoint: `${config?.apiHost}/projects`,
    method: "GET",
    headers: [],
    credentials: "include",
    types: [SET_LOADING, SET_PROJECTS, SET_ERROR],
  });
export default function reducer(state = initialState, action) {
  switch (action.type) {
    case SET_PROJECT: {
      const newState = {
        ...state,
        isLoading: false,
        hasError: false,
        project: action?.project,
      };
      return newState;
    }
    case SET_PROJECTS: {
      const newState = {
        ...state,
        isLoading: false,
        hasError: false,
        user_projects: action?.payload,
      };
      return newState;
    }
    case SET_LOADING: {
      const newState = {
        ...state,
        isLoading: true,
        hasError: false,
        project: action?.project,
      };
      return newState;
    }
    case SET_ERROR: {
      const newState = {
        ...state,
        isLoading: false,
        hasError: true,
        project: action?.project,
      };
      return newState;
    }
    default:
      return state;
  }
}

我试过用不同的redux版本以各种方式设置我的商店,但仍然得到同样的错误。有趣的是,我用了这个完全相同的函数作为一个类,并能够成功地使用它,但出于某种原因,我不知道为什么现在它不工作。我知道一个事实,即createAction函数接受一个带有类型键的对象。我没有选择了。请帮助!

5n0oy7gb

5n0oy7gb1#

虽然这不是对您的问题的 * 直接 * 回答,但我有一些关于如何改进代码的建议。
首先,使用Redux Toolkit的configureStore API,您不必自己设置和编写所有中间件。

return configureStore({
    reducer,
    preLoadedState,
    middleware: (getDefaultMiddleware) => 
      getDefaultMiddleware()
        .concat(apiMiddleware, routerMiddleware(history))

  });

第二,作为一般观察:我们特别建议 * 反对 * 使用Immutable.js,而建议您 * 应该 * 使用Immer进行不可变更新:

  • https://redux.js.org/style-guide/#use-immer-for-writing-immutable-updates
  • https://redux.js.org/style-guide/#use-plain-javascript-objects-for-state

更具体地说,Redux Toolkit的createSlice API已经内置了Immer。它还自动为您生成动作创建者和动作类型,因此您不必自己编写任何这些内容:

最后,Redux Toolkit包括我们的“RTK Query”数据获取和缓存API,它可以消除为获取数据而编写 * 任何 * 操作、thunk、中间件、reducer或效果的需要:

例如,所有这些文件 * 很可能 * 被替换为:

import { createApi, fetchBaseQuery} from "@reduxjs/toolkit/query/react";

const api = createApi({
  baseQuery: fetchBaseQuery({
    baseUrl: `${config?.apiHost ?? ''}`,
    endpoints: (build) => ({
      getProjects: build.query({
        query: () => '/projects'
      })
    })
  })
)}

export const { useGetProjectsQuery } = api;

将RTK查询API中间件和Reducer添加到存储设置中,在组件中使用查询挂钩,* 所有 * 数据获取和缓存都将自动完成!

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