Vuex 从 getter 访问 this.$store

Question

我正在尝试从 getters 部分访问 this.$store.commit，我看到未定义的错误属性“$store”，我能够从突变访问 this.$store，那么为什么不从 getters 访问呢？

我的 store.js 文件

import Vue from 'vue';
import Vuex from 'vuex';
import order from './modules/order/order'
import dialogList from './modules/dialog/dialogList'

Vue.use(Vuex);

export const store = new Vuex.Store({
    state: { },
    getters: {

    },
    modules: {
        order,
        dialogList
    }
});

我的 order.js 文件从 dialogList 调用突变

const state = {
    order: {
       ...
    }
}

const getters = {
    showInfoDialogWithCalculatedData(state) {
    //... some actions

    //here this.$store is undefined
    this.$store.commit('showInfoDialog', { message: 'test', type: 'error'});
    
    return someData;
    }
}

const mutations = {
    showInfoDialogWithCalculatedData(state) {
    //... some actions

    //here this.$store is defined
    this.$store.commit('showInfoDialog', { message: 'test', type: 'error'});
   
    }
}

export default {
    state,
    getters,
}

为什么 this.$store 在 getter 中未定义？

Answer 1

因为 getter 不应该提交突变，也许您可​​以设置一个 watcher，所以当 getter 调用更新时，您可以提交或者如果您真的想要这样做可以导入 store 并从导入的 store 中调用 commit。

import store from "../index";

const getters = {
  showInfoDialogWithCalculatedData(state) {
  //... some actions

  //Store imported
  store .commit('showInfoDialog', { message: 'test', type: 'error'});

  return someData;
}