vue.js - Vuex:在 mapState() 中找不到 [vuex] 模块命名空间 | mapGetters(): X/

Question

根据 Vuex 文档模块化组织存储( https://vuex.vuejs.org/guide/modules.html )，我有以下内容:
store/index.js :

import Vue from "vue";
import Vuex from "vuex";

Vue.use(Vuex);

// Default Store State for the Hug Employee Dashboard:
// import defaultState from "@/store/defaultStore";

/*eslint no-param-reassign: ["error", { "props": false }]*/
/*eslint indent: ["error", 2]*/
/*eslint arrow-body-style: ["error", "always"]*/
/*eslint-env es6*/

const surfGroups = {
  state: {
    activeSurfGroup: {},
    fetchingSurfGroupLoading: false,
    creatingSurfGroupLoading: false
  },
  getters: {
    activeSurfGroup: state => {
      return state.activeSurfGroup;
    },
  },
  mutations: {
    // API Request Mutations:
    SET_ACTIVE_SURF_GROUP(state, payload) {
      this.activeSurfGroup = payload;
    },
    // Loading Mutations:
    SET_FETCHING_SURF_GROUP_LOADING(state, payload) {
      state.fetchingSurfGroupLoading = payload;
    },
    SET_CREATING_SURF_GROUP_LOADING(state, payload) {
      state.creatingSurfGroupsLoading = payload;
    }
  },
  actions: {
    fetchSurfGroup: async ({ commit }, payload) => {
      commit("SET_FETCHING_SURF_GROUP_LOADING", true);
      // Dispatches the following Surf Levels API service:
      // this.$surfLevelsAPI.fetchActiveSurfGroup(
      //   payload.activeSurfGroupUUID
      // );
      await Vue.prototype.$surfLevelsAPI.fetchActiveSurfGroup(payload).then((response) => {
        if (response.success) {
          commit("SET_ACTIVE_SURF_GROUP", response.data);
          commit("SET_FETCHING_SURF_GROUP_LOADING", false);
        }
      });
    },
    createSurfGroup: async ({ commit }, payload) => {
      commit("SET_CREATING_SURF_GROUP_LOADING", true);
      // Dispatches the following Surf Levels API service:
      // this.$surfLevelsAPI.createNewSurfGroup(
      //   payload.activeSurfInstructor, payload.activeSurfSessionSelected, payload.activeGroupSurfers
      // );
      await Vue.prototype.$surfLevelsAPI.createNewSurfGroup(payload).then((response) => {
        if (response.success) {
          commit("SET_CREATING_SURF_GROUP_LOADING", false);
        }
      });
    }
  }
};

export default new Vuex.Store({
  modules: {
    surfGroups: surfGroups
  }
});

我觉得这一切看起来都很好。

但是，在 component.Vue 内，当我 ...mapState 为:

import { mapState } from 'vuex';

export default {
  name: "MyComponent",
  // Computed Properties:
  computed: {
    ...mapState('surfGroups', [
      'creatingSurfGroupLoading',
    ]),
  },
  // Component Watchers:
  watch: {
    creatingSurfGroupLoading() {
      console.log(this.creatingSurfGroupLoading);
    },
  },
};

我收到以下错误:
[vuex] module namespace not found in mapState(): surfGroups/
我到底做错了什么？通过阅读文档，我可以看到任何明显的差异？

Answer 1

你还没有设置命名空间。

const surfGroups = {
  namespaced: true,
...

来源: https://vuex.vuejs.org/guide/modules.html#namespacing