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Vue.js 异步/等待在路由器中未按预期工作。是否在vue中的每个防护之前?_Vue.js_Vuex_Router - Fatal编程技术网

Vue.js 异步/等待在路由器中未按预期工作。是否在vue中的每个防护之前?

Vue.js 异步/等待在路由器中未按预期工作。是否在vue中的每个防护之前?,vue.js,vuex,router,Vue.js,Vuex,Router,这是我的路由器保护: router.beforeEach(async (to,from,next)=>{ await store.dispatch('GetPermission'); if(to.matched.some(record => record.meta.requireAuth)){ let permissions=store.state.permissions; //getting empty console.log(permission

这是我的路由器保护:

router.beforeEach(async (to,from,next)=>{   
  await store.dispatch('GetPermission'); 
  if(to.matched.some(record => record.meta.requireAuth)){
    let permissions=store.state.permissions; //getting empty 
    console.log(permissions);
    if(permissions.filter(per => (per.name === 'read_list').length!=0)){
      next({
        path:'/dashboard/create'
      }) 
    }
    else{
        next()  
    }
  
  }
  // else if(to.matched.some(record => record.meta.requireAuth)){
  //     if(store.token!=null){
  //     next({
  //       path:'/dashboard'
  //     }) 
  //   }
  //   else{
  //     next()
  //   }
  // }
  else{
    next()
  }

});
GetPermission(context){
            axios.defaults.headers.common['Authorization']='Bearer ' + context.state.token
            axios.get('http://127.0.0.1:8000/api/user').then((response)=>{
                console.log(response)
                context.commit('Permissions',response.data.permission)
            })
//mutation:
Permissions(state,payload){
            state.permissions=payload
        }
//state
state:{
        error:'',
        token:localStorage.getItem('token') || null,
        permissions:'',
        success:'',
        isLoggedin:'',
        LoggedUser:{}
    }
问题在于,尽管我在分派方法中使用了wait,但我并没有得到权限的状态值,该值最初为空 以下是vuex商店代码:

router.beforeEach(async (to,from,next)=>{   
  await store.dispatch('GetPermission'); 
  if(to.matched.some(record => record.meta.requireAuth)){
    let permissions=store.state.permissions; //getting empty 
    console.log(permissions);
    if(permissions.filter(per => (per.name === 'read_list').length!=0)){
      next({
        path:'/dashboard/create'
      }) 
    }
    else{
        next()  
    }
  
  }
  // else if(to.matched.some(record => record.meta.requireAuth)){
  //     if(store.token!=null){
  //     next({
  //       path:'/dashboard'
  //     }) 
  //   }
  //   else{
  //     next()
  //   }
  // }
  else{
    next()
  }

});
GetPermission(context){
            axios.defaults.headers.common['Authorization']='Bearer ' + context.state.token
            axios.get('http://127.0.0.1:8000/api/user').then((response)=>{
                console.log(response)
                context.commit('Permissions',response.data.permission)
            })
//mutation:
Permissions(state,payload){
            state.permissions=payload
        }
//state
state:{
        error:'',
        token:localStorage.getItem('token') || null,
        permissions:'',
        success:'',
        isLoggedin:'',
        LoggedUser:{}
    }

请帮助我解决此问题???

Vuex中的操作是异步的。让调用函数(操作的发起方)知道操作已完成的唯一方法是返回一个承诺并稍后解决它

下面是一个示例:myAction返回一个承诺,进行http调用,然后解析或拒绝该承诺—所有这些都是异步的

actions: {
myAction(context, data) {
    return new Promise((resolve, reject) => {
        // Do something here... lets say, a http call using vue-resource
        this.$http("/api/something").then(response => {
            // http success, call the mutator and change something in state
            resolve(response);  // Let the calling function know that http is done. You may send some data back
        }, error => {
            // http failed, let the calling function know that action did not work out
            reject(error);
        })
    })
}
}

现在,当您的Vue组件启动myAction时,它将获得这个Promise对象,并可以知道它是否成功。以下是Vue组件的一些示例代码:

export default {
mounted: function() {
    // This component just got created. Lets fetch some data here using an action
    this.$store.dispatch("myAction").then(response => {
        console.log("Got some data, now lets show something in this component")
    }, error => {
        console.error("Got nothing from server. Prompt user to check internet connection and try again")
    })
}
}

另外,当没有权限匹配时,您正在调用相同的路由,在这种情况下,它总是调用相同的路由并进行无限循环。
如果权限被拒绝,则重定向到访问被拒绝页面。

我可以通过以下方式在vuex操作中使用return来解决此问题
GetPermission(context){axios.defaults.headers.common['Authorization']='Bearer'+context.state.token return axios.get('http://127.0.0.1:8000/api/user)。然后((回应)=>{console.log(response)context.commit('Permissions',response.data.permission)}
但是现在我遇到了很多请求错误,有什么问题吗?