在beforeEach期间将vuex模块状态传递到vue-router

时间:2016-10-09 06:24:14

标签: javascript vue.js vue-router vuex

我将VueJS与vuexvue-router结合使用。我有一个vuex模块正在对其商店进行变异,并尝试使用它来确定用户是否经过身份验证。

以下是我的代码在相关部分中的样子。

main.js

import Vue from 'vue'
import App from './App.vue'
import store from './store'
import router from './router'

router.beforeEach((to, from, next) => {
    console.log(router.app) // prints a Vue$2 object
    console.log(router.app.$store) // undefined
    console.log(store.getters.isAuthenticated) // false
    ...
}

const app = new Vue({
  store,
  router,
  ...App
})

app.$mount('#app')

/store/index.js

import Vue from 'vue'
import Vuex from 'vuex'
import core from './modules/core'

Vue.use(Vuex)

const store = new Vuex.Store({
  modules: {
    core: core
  }
})

export default store

/store/modules/core.js

import * as types from '../types'
import api from '../../api'
import router from '../../router'

const state = {
  token: null,
  user: null,
  authenticated: false
}

const mutations = {
  [types.LOGIN_SUCCESS] (state, payload) {
    console.log('mutate')
    state.token = payload.token
    state.user = payload.user
    state.authenticated = true
    router.go('/')
  }
}

const getters = {
  isAuthenticated: state => {
    return state.authenticated
  }
}

const actions = {
  [types.LOGIN] (context, payload) {
    api.getToken(payload).then(response => {
      context.commit(types.LOGIN_SUCCESS, response)
    })
  }
}

export default {
  state,
  mutations,
  actions,
  getters
}

当我通过逻辑触发LOGIN操作时,我可以看到突变正确执行,当我使用Chrome扩展程序查看我的core模块的vuex状态时, userauthenticated的状态已正确变异。

问题

似乎这个模块在路由器在.beforeEach循环中运行时才刚刚加载。这是真的吗?

如果是,有关如何处理这种情况的其他一些建议是什么? 如果不是,我做错了什么?

1 个答案:

答案 0 :(得分:1)

console.log(store.state.core.authenticated)返回false,因为您尚未登录。

在您的代码中,您不会在任何地方保留用户信息。例如。使用localstorage

同样的考虑因素:

  1. 不使用router.app.$store,请使用您导入的store
  2. LOGIN_SUCCESS突变中,将登录信息和令牌存储到localstorage
  3. beforeEach挂钩中,检查localstorage,如果填充了令牌,请获取用户信息并应用突变。如果没有,请拨打登录页面
  4. 像这样......

    const mutations = {
      [types.LOGIN_SUCCESS] (state, payload) {
        state.token = payload.token
        state.user = payload.user
        state.authenticated = true
        localstorage.setItem('token', payload.token)
        localstorage.setItem('user', payload.user)
      }
    }
    
    const actions = {
      [types.LOGIN] (context, payload) {
        return api.getToken(payload).then(response => {
          context.commit(types.LOGIN_SUCCESS, response)
          return response
        })
      }
    }
    
    router.beforeEach((to, from, next) => {
        let user = localstorage.getItem('user')
        let token = localstorage.getItem('token')
        if (user && token) {
          store.commit(types.LOGIN_SUCCESS, {token, user})
          next()
        }
        else if (!store.getters.isAuthenticated) {
          store.dispatch(types.LOGIN).then(() => next())
        } else {
          next()
        }
    }