vue-admin-template 动态路由的实现示例

提供登录与获取用户信息数据接口

在api/user.js中

import request from '@/utils/request'
const api = {
  takeout: '/student/students/takeout/',
  loginin: '/student/students/loginin/',
  studentinfo:'/student/students/studentinfo/',
}
export function login(parameter) {
  return request({
    url: api.loginin,
    method: 'get',
    params: parameter
  })
}

export function getinfo(token) {
  return request({
    url: api.studentinfo,
    method: 'get',
    params: {'token':token}
  })
}

export function logout() {
  return request({
    url: api.takeout,
    method: 'get'
  })
}

登录接口数据

{'code': 200, 'data': {'token': 'x-admin'}, 'message': "操作成功"}

退出接口数据

{'code': 200, 'data': 'success', 'message': "操作成功"}

详情接口数据

{
    "code": 200,
    "data": {
        "avatar": "https://wpimg.wallstcn.com/f778738c-e4f8-4870-b634-56703b4acafe.gif",
        "name": "黄晓果",
        "roles": [
            "editor"
        ]
    }
}

改造router/index.js

import vue from 'vue'
import router from 'vue-router'

vue.use(router)

/* layout */
import layout from '@/layout'

// 基础路由
export const constantroutes = [
  {
    path: '/login',
    component: () => import('@/views/login/index'),
    hidden: true
  },

  {
    path: '/404',
    component: () => import('@/views/404'),
    hidden: true
  },

  {
    path: '/',
    component: layout,
    redirect: '/dashboard',
    children: [{
      path: 'dashboard',
      name: 'dashboard',
      component: () => import('@/views/dashboard/index'),
      meta: { title: '首页', icon: 'el-icon-menu' }
    }]
  },
]

/**
 * 动态路由
 */
export const asyncroutes = [
  {
    path: '/studentinformation',
    component: layout,
    children: [
      {
        path: 'index',
        component: () => import('@/views/studentinformation/index'),
        meta: { title: '学生信息', icon: 'el-icon-s-check' }
      }
    ]
  },
  {
    path: '/lecturerinformation',
    component: layout,
    children: [
      {
        path: 'index',
        component: () => import('@/views/lecturerinformation/index'),
        meta: { title: '讲师信息', icon: 'el-icon-s-custom', roles: ['editor'] }
      }
    ]
  },
  {
    path: '/coursemanage',
    component: layout,
    meta: { roles: ['admin'] },
    children: [
      {
        path: 'index',
        component: () => import('@/views/coursemanage/index'),
        meta: { title: '课程管理', icon: 'el-icon-s-platform'}
      }
    ]
  },
  // 404 页面必须放置在最后一个页面
  { path: '*', redirect: '/404', hidden: true }
]

const createrouter = () => new router({
  // mode: 'history', // require service support
  scrollbehavior: () => ({ y: 0 }),
  routes: constantroutes
})

const router = createrouter()

// detail see: https://github.com/vuejs/vue-router/issues/1234#issuecomment-357941465
export function resetrouter() {
  const newrouter = createrouter()
  router.matcher = newrouter.matcher // reset router
}

export default router

将动态显示的路由写在asyncroutes 中并添加 roles ，例如meta: { roles: [‘admin'] },

在store/modulds目录下添加permission.js

import { asyncroutes, constantroutes } from '@/router'

/**
 * use meta.role to determine if the current user has permission
 * @param roles
 * @param route
 */
function haspermission(roles, route) {
  if (route.meta && route.meta.roles) {
    return roles.some(role => route.meta.roles.includes(role))
  } else {
    return true
  }
}

/**
 * filter asynchronous routing tables by recursion
 * @param routes asyncroutes
 * @param roles
 */
export function filterasyncroutes(routes, roles) {
  const res = []

  routes.foreach(route => {
    const tmp = { ...route }
    if (haspermission(roles, tmp)) {
      if (tmp.children) {
        tmp.children = filterasyncroutes(tmp.children, roles)
      }
      res.push(tmp)
    }
  })

  return res
}

const state = {
  routes: [],
  addroutes: []
}

const mutations = {
  set_routes: (state, routes) => {
    state.addroutes = routes
    state.routes = constantroutes.concat(routes)
  }
}

const actions = {
  generateroutes({ commit }, roles) {
    return new promise(resolve => {
      const accessedroutes = filterasyncroutes(asyncroutes, roles)
      commit('set_routes', accessedroutes)
      resolve(accessedroutes)
    })
  }
}

export default {
  namespaced: true,
  state,
  mutations,
  actions
}

修改store/modulds/user.js

import { login, logout, getinfo } from '@/api/user'
import { gettoken, settoken, removetoken } from '@/utils/auth'
import { resetrouter } from '@/router'

const getdefaultstate = () => {
  return {
    token: gettoken(),
    name: '',
    avatar: '',
    roles: []
  }
}

const state = getdefaultstate()

const mutations = {
  reset_state: (state) => {
    object.assign(state, getdefaultstate())
  },
  set_token: (state, token) => {
    state.token = token
  },
  set_name: (state, name) => {
    state.name = name
  },
  set_avatar: (state, avatar) => {
    state.avatar = avatar
  },
  set_roles: (state, roles) => {
    state.roles = roles
  }
}

const actions = {
  // user login
  login({ commit }, userinfo) {
    const { username, password } = userinfo
    return new promise((resolve, reject) => {
      login({ username: username.trim(), password: password }).then(response => {
        const { data } = response
        commit('set_token', data.token)
        settoken(data.token)
        resolve()
      }).catch(error => {
        reject(error)
      })
    })
  },

  // get user info
  getinfo({ commit, state }) {
    return new promise((resolve, reject) => {
      getinfo(state.token).then(response => {
        const { data } = response

        if (!data) {
          return reject('验证失败，请重新登录')
        }

        const {roles, name, avatar } = data
        commit('set_roles', roles)
        commit('set_name', name)
        commit('set_avatar', avatar)
        resolve(data)
      }).catch(error => {
        reject(error)
      })
    })
  },

  // user logout
  logout({ commit, state }) {
    return new promise((resolve, reject) => {
      logout(state.token).then(() => {
        removetoken() // must remove  token  first
        resetrouter()
        commit('reset_state')
        commit('set_roles', [])
        resolve()
      }).catch(error => {
        reject(error)
      })
    })
  },

  // remove token
  resettoken({ commit }) {
    return new promise(resolve => {
      removetoken() // must remove  token  first
      commit('reset_state')
      commit('set_roles', [])
      resolve()
    })
  }
}

export default {
  namespaced: true,
  state,
  mutations,
  actions
}

添加roles: [] 保存权限列表 ，添加内容如下

const getdefaultstate = () => {
  return {
    ...
    roles: []
  }
}

const mutations = {
  ...
  set_roles: (state, roles) => {
    state.roles = roles
  }
}

  // get user info
  getinfo({ commit, state }) {
    return new promise((resolve, reject) => {
      getinfo(state.token).then(response => {
        ...
        const {roles, name, avatar } = data
        commit('set_roles', roles)
        ...
      }).catch(error => {
        reject(error)
      })
    })
  },

  // user logout
  logout({ commit, state }) {
    return new promise((resolve, reject) => {
      logout(state.token).then(() => {
        ...
        commit('set_roles', [])
        ...
      }).catch(error => {
        reject(error)
      })
    })
  },

  // remove token
  resettoken({ commit }) {
    return new promise(resolve => {
      ...
      commit('set_roles', [])
      ...
    })
  }
}

在store/getters.js中添加roles

const getters = {
  sidebar: state => state.app.sidebar,
  device: state => state.app.device,
  token: state => state.user.token,
  avatar: state => state.user.avatar,
  name: state => state.user.name,
  
  //添加roles
  roles: state => state.user.roles,
  //动态路由
  permission_routes: state => state.permission.routes,
}
export default getters

将permission添加到store/index.js中

import vue from 'vue'
import vuex from 'vuex'
import getters from './getters'
import app from './modules/app'
import settings from './modules/settings'
import user from './modules/user'

//添加permission
import permission from './modules/permission'

vue.use(vuex)

const store = new vuex.store({
  modules: {
    app,
    settings,
    user,
    
 //添加permission
    permission
  },
  getters
})

export default store

最后修改根目录下的permission.js

import router, { constantroutes } from './router'
import store from './store'
import { message } from 'element-ui'
import nprogress from 'nprogress' // progress bar
import 'nprogress/nprogress.css' // progress bar style
import { gettoken } from '@/utils/auth' // get token from cookie
import getpagetitle from '@/utils/get-page-title'

nprogress.configure({ showspinner: false }) // nprogress configuration

const whitelist = ['/login'] // no redirect whitelist

router.beforeeach(async (to, from, next) => {
  // start progress bar
  nprogress.start()

  // set page title
  document.title = getpagetitle(to.meta.title)

  // determine whether the user has logged in
  const hastoken = gettoken()

  if (hastoken) {
    if (to.path === '/login') {
      // if is logged in, redirect to the home page
      next({ path: '/' })
      nprogress.done()
    } else {
      const hasroles = store.getters.roles && store.getters.roles.length > 0
      if (hasroles) {
        next()
      } else {
        try {
          // get user info
          // note: roles must be a object array! such as: ['admin'] or ,['developer','editor']
          const { roles } = await store.dispatch('user/getinfo')
          console.log(roles)
          // generate accessible routes map based on roles
          const accessroutes = await store.dispatch('permission/generateroutes', roles)
          // dynamically add accessible routes
          router.options.routes = constantroutes.concat(accessroutes)
          router.addroutes(accessroutes)
          
          // hack method to ensure that addroutes is complete
          // set the replace: true, so the navigation will not leave a history record
          next({ ...to, replace: true })
        } catch (error) {
          // remove token and go to login page to re-login
          await store.dispatch('user/resettoken')
          message.error(error || 'has error')
          next(`/login?redirect=${to.path}`)
          nprogress.done()
        }
      }
    }
  } else {
    /* has no token*/

    if (whitelist.indexof(to.path) !== -1) {
      // in the free login whitelist, go directly
      next()
    } else {
      // other pages that do not have permission to access are redirected to the login page.
      next(`/login?redirect=${to.path}`)
      nprogress.done()
    }
  }
})

router.aftereach(() => {
  // finish progress bar
  nprogress.done()
})

将数据绑定到nav导航栏上

在layout/components/sidebar/index.vue中

...mapgetters([
      // 动态路由 增加permission_routes
      'permission_routes',
      'sidebar'
    ]),

 <!-- 动态路由 -->
 <sidebar-item v-for="route in permission_routes" :key="route.path" :item="route" :base-path="route.path" />

全部代码如下：

<template>
  <div :class="{ 'has-logo': showlogo }">
    <logo v-if="showlogo" :collapse="iscollapse" />
    <el-scrollbar wrap-class="scrollbar-wrapper">
      <el-menu
        :default-active="activemenu"
        :collapse="iscollapse"
        :background-color="variables.menubg"
        :text-color="variables.menutext"
        :unique-opened="false"
        :active-text-color="variables.menuactivetext"
        :collapse-transition="false"
        mode="vertical"
      >
        <!-- <sidebar-item
          v-for="route in routes"
          :key="route.path"
          :item="route"
          :base-path="route.path"
        /> -->
        <sidebar-item
          v-for="route in permission_routes"
          :key="route.path"
          :item="route"
          :base-path="route.path"
        />
      </el-menu>
    </el-scrollbar>
  </div>
</template>

<script>
import { mapgetters } from 'vuex'
import logo from './logo'
import sidebaritem from './sidebaritem'
import variables from '@/styles/variables.scss'

export default {
  components: { sidebaritem, logo },
  computed: {
    ...mapgetters([
      // 动态路由 增加permission_routes
      'permission_routes',
      'sidebar',
    ]),
    routes() {
      return this.$router.options.routes
    },
    activemenu() {
      const route = this.$route
      const { meta, path } = route
      // if set path, the sidebar will highlight the path you set
      if (meta.activemenu) {
        return meta.activemenu
      }
      return path
    },
    showlogo() {
      return this.$store.state.settings.sidebarlogo
    },
    variables() {
      return variables
    },
    iscollapse() {
      return !this.sidebar.opened
    },
  },
}
</script>

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