用的vuex的modules

• mutation-type

export const GET_TABGRADE = 'GET_TABGRADE'

• api部分代码

    const tanjie = axios.create({
        baseURL: 'tanjie'
    })
    
    findGrade1: function () {
        return new Promise((resovle, reject) => {
            tanjie({
                url: '/content/findGrade1'
            }).then(response => {
                console.log('api is transfer')
                resovle(response.data)
            }).catch(error => {
                reject(error)
            })
        })
    },

• 模块：

import baseApi from '@/api/base'
import * as types from '../mutation-type'

const state = {
    tabGrade: {
        errno: 1,
        list: {}
    }
}

const getters = {
    getTabGrade: state => {
        state.tabGrade
    }
}

const actions = {
    // 调用api
    getTabGrade({ commit }) {
        console.log('is actions')
        return new Promise(function (resolve, reject) {
            baseApi.findGrade1()
                .then(res => {
                    commit(types.GET_TABGRADE, res)
                    resolve(res);   
                }).catch(err => {
                    console.log(err)
                })
        })

    }
}

const mutations = {
    [types.GET_TABGRADE](state, res) {
        
        state.tabGrade = {
            ...state.tabGrade,
            list: res.list
        }
        console.log(state.tabGrade)
        
    }
}

export default {
    state,
    getters,
    actions,
    mutations
}

• 组件内

  computed: {
    ...mapGetters([
      'getTabGrade'
    ]),
    
  created() {
    this.$store.dispatch('getTabGrade')
      .then(res => {
        console.log(res) // undefined
        return res
      })
      .catch(err => {
        console.log(err)
      })
  },

各个模块的引用应该是没有问题得，毕竟组件内可以通过 this.$store 来访问 state

但是不知道为何 dispatch 会返回 undefined

组件内可以获得正确的数据的，请问我该如何去使用，就像通过{{}}来展示一个grade1_name