如何在js文件VUEX中获得状态访问

Question

我想访问state中currentUser的{​​{1}}的{​​{1}}属性vuex以在user.js中使用它，但是如果我写道：auth.js ...

我收到此错误：

  

无法读取未定义的属性“状态”。

代码中缺少什么？

树：

store.state.currentUser.uid ===

user.js：

src
 store
   user
    |>user.js
    |>mutations.js
   index.js
 auth.js

auth.js：

 const state = {
   profile: {},
   loggedIn: false,
   currentUser: null,
   userProfile: {}
 }

 export default {
   namespaced: true,
   state
 }

index.js

import store from './store'
const fb = require('./firebaseConfig.js')

fb.auth.onAuthStateChanged(user => {
 if (user) {
  fb.postsCollection.orderBy('createdOn', 'desc').onSnapshot(querySnapshot => {

  let createdByCurrentUser
  if (querySnapshot.docs.length) {
    createdByCurrentUser = store.state.currentUser.uid === 
      querySnapshot.docChanges()[0].doc.data().userId ? 'Yes' : 'No'
    console.log(createdByCurrentUser)
   }
 })
 }
})

Answer 1

您需要使用getters，在doc中查看

getters.js

export default {
  currentUser
}

function currentUser({ currentUser }) {
  return currentUser;
}

user.js

import getters from './getters'

export default {
  namespaced: true,
  state: {
    profile: {},
    loggedIn: false,
    currentUser: null,
    userProfile: {}
  },
  getters
}

auth.js

import store from './store';

const currentUser = store.getters['user/currentUser'];

因为为模块命名空间，所以必须使用其名称作为前缀来访问getter函数