vue自定义权限标签

vue自定义权限标签

vue自定义权限标签

技术栈

  • vuex
  • vue自定义标签

开门见山

  1. 创建directive
  • hasPermi.js

     /**
     * v-hasPermi 操作权限处理
     */
    
    import store from '@/store'
    
    export default {
      inserted(el, binding, vnode) {
        const { value } = binding
        const all_permission = "*:*:*";
        const permissions = store.getters && store.getters.permissions
    
        if (value && value instanceof Array && value.length > 0) {
          const permissionFlag = value
    
          const hasPermissions = permissions.some(permission => {
            return all_permission === permission || permissionFlag.includes(permission)
          })
    
          if (!hasPermissions) {
            el.parentNode && el.parentNode.removeChild(el)
          }
        } else {
          throw new Error(`请设置操作权限标签值`)
        }
      }
    }
    
    
  • index.js

    import hasPermi from './permission/hasPermi'
    
    const install = function(Vue) {
      Vue.directive('hasPermi', hasPermi)
    }
    
    if (window.Vue) {
      window['hasPermi'] = hasPermi
      Vue.use(install); // eslint-disable-line
    }
    
    export default install
    
    
  1. store
  • user.js

    import {getPermissions} from "@/api/token/assets";
    import async from "async";
    
    const user = {
        state: {
            permissions: []
        },
    
        mutations: {
            SET_PERMISSIONS: (state, permissions) => {
                state.permissions = permissions
            }
        },
    
        actions: {
            // 获取用户信息
            GetInfo({***mit}, query) {
                return new Promise((resolve, reject) => {
                    // 获取权限信息(请求后台数据接口)
                    getPermissions(query).then(res => {
                        if ( res.code == 200 ) {
                            ***mit('SET_PERMISSIONS', res.data)
                        }
                        resolve(res)
                    }).catch(error => {
                        reject(error)
                    })
                })
            }
        }
    }
    
    export default user
    
    
  • getters.js

    const getters = {
      token: state => state.user.token,
      permissions: state => state.user.permissions
    }
    export default getters
    
    
  • index.js

    import Vue from 'vue'
    import Vuex from 'vuex'
    
    import user from './modules/user'
    
    import getters from './getters'
    
    Vue.use(Vuex)
    
    const store = new Vuex.Store({
      modules: {
        user
      },
      getters
    })
    
    export default store
    
    
  1. src目录下创建permission.js

    import router from './router'
    import store from './store'
    import { Message } from 'element-ui'
    
    router.beforeEach((to, from, next) => {
      // to.query 获取url路由请求参数,传递给后端使用
      store.dispatch('GetInfo',to.query).then(() => {
        next()
      }).catch(err => {
        Message.error(err)
      })
    })
    
    
  2. src下的main.js使用

    import Vue from 'vue'
    import App from './App.vue'
    import router from './router'
    import ElementUI from 'element-ui';
    import 'element-ui/lib/theme-chalk/index.css';
    import directive from './directive' // directive
    import store from './store'
    import './permission' // permission control
    
    Vue.use(ElementUI)
    Vue.use(directive)
    
    
    new Vue({
      router,
      store,
      render: h => h(App)
    }).$mount('#app')
    
  3. 按钮标签

     <el-button
                  size="mini"
                  type="text"
                  icon="el-icon-delete"
                  @click="handleDelete(scope.row)"
                  v-hasPermi="['btn:delete']"
              >删除
              </el-button>
    

    说明:

    如果后台接口返回的按钮权限数据里包含btn:delete则删除按钮显示,否则不显示

    后台返回数据如下:

    [
      "btn:list", 
      "btn:add", 
      "btn:delete", 
      "btn:edit"
    ]
    
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