前端vue实现讲师新增和修改功能

1.在router中配置路由菜单

import Vue from 'vue'
import Router from 'vue-router'
 
// in development-env not use lazy-loading, because lazy-loading too many pages will cause webpack hot update too slow. so only in production use lazy-loading;
// detail: https://panjiachen.github.io/vue-element-admin-site/#/lazy-loading
 
Vue.use(Router)
 
/* Layout */
import Layout from '../views/layout/Layout'
 
/**
* hidden: true                   if `hidden:true` will not show in the sidebar(default is false)
* alwaysShow: true               if set true, will always show the root menu, whatever its child routes length
*                                if not set alwaysShow, only more than one route under the children
*                                it will becomes nested mode, otherwise not show the root menu
* redirect: noredirect           if `redirect:noredirect` will no redirect in the breadcrumb
* name:'router-name'             the name is used by  (must set!!!)
* meta : {
    title: 'title'               the name show in submenu and breadcrumb (recommend set)
    icon: 'svg-name'             the icon show in the sidebar,
  }
**/
export const constantRouterMap = [
  { path: '/login', component: () => import('@/views/login/index'), hidden: true },
  { path: '/404', component: () => import('@/views/404'), hidden: true },
 
  {
    path: '/',
    component: Layout,
    redirect: '/dashboard',
    name: 'Dashboard',
    hidden: true,
    children: [{
      path: 'dashboard',
      component: () => import('@/views/dashboard/index')
    }]
  },
 
  {
    path: '/teacher',
    component: Layout,
    redirect: '/example/table',
    name: '讲师管理',
    meta: { title: '讲师管理', icon: 'example' },
    children: [
      {
        path: 'list',
        name: '讲师列表',
        component: () => import('@/views/teacher/list'),
        meta: { title: '讲师列表', icon: 'table' }
      },
      {
        path: 'add',
        name: '添加讲师',
        component: () => import('@/views/teacher/add'),
        meta: { title: '添加讲师', icon: 'tree' }
      },
      {
        path: 'add/:id',
        name: 'EduTeacherEdit',
        component: () => import('@/views/teacher/add'),
        meta: { title: '编辑讲师', noCache: true },
        hidden: true
      }
 
    ]
  },
  {
    path: '/example',
    component: Layout,
    redirect: '/example/table',
    name: 'Example',
    meta: { title: 'Example', icon: 'example' },
    children: [
      {
        path: 'table',
        name: 'Table',
        component: () => import('@/views/table/index'),
        meta: { title: 'Table', icon: 'table' }
      },
      {
        path: 'tree',
        name: 'Tree',
        component: () => import('@/views/tree/index'),
        meta: { title: 'Tree', icon: 'tree' }
      }
    ]
  },
 
  {
    path: '/form',
    component: Layout,
    children: [
      {
        path: 'index',
        name: 'Form',
        component: () => import('@/views/form/index'),
        meta: { title: 'Form', icon: 'form' }
      }
    ]
  },
 
  {
    path: '/nested',
    component: Layout,
    redirect: '/nested/menu1',
    name: 'Nested',
    meta: {
      title: 'Nested',
      icon: 'nested'
    },
    children: [
      {
        path: 'menu1',
        component: () => import('@/views/nested/menu1/index'), // Parent router-view
        name: 'Menu1',
        meta: { title: 'Menu1' },
        children: [
          {
            path: 'menu1-1',
            component: () => import('@/views/nested/menu1/menu1-1'),
            name: 'Menu1-1',
            meta: { title: 'Menu1-1' }
          },
          {
            path: 'menu1-2',
            component: () => import('@/views/nested/menu1/menu1-2'),
            name: 'Menu1-2',
            meta: { title: 'Menu1-2' },
            children: [
              {
                path: 'menu1-2-1',
                component: () => import('@/views/nested/menu1/menu1-2/menu1-2-1'),
                name: 'Menu1-2-1',
                meta: { title: 'Menu1-2-1' }
              },
              {
                path: 'menu1-2-2',
                component: () => import('@/views/nested/menu1/menu1-2/menu1-2-2'),
                name: 'Menu1-2-2',
                meta: { title: 'Menu1-2-2' }
              }
            ]
          },
          {
            path: 'menu1-3',
            component: () => import('@/views/nested/menu1/menu1-3'),
            name: 'Menu1-3',
            meta: { title: 'Menu1-3' }
          }
        ]
      },
      {
        path: 'menu2',
        component: () => import('@/views/nested/menu2/index'),
        meta: { title: 'menu2' }
      }
    ]
  },
 
  {
    path: 'external-link',
    component: Layout,
    children: [
      {
        path: 'https://panjiachen.github.io/vue-element-admin-site/#/',
        meta: { title: 'External Link', icon: 'link' }
      }
    ]
  },
 
  { path: '*', redirect: '/404', hidden: true }
]
 
export default new Router({
  // mode: 'history', //后端支持可开
  scrollBehavior: () => ({ y: 0 }),
  routes: constantRouterMap
})

2.添加完成路由菜单后，在views文件夹中添加对应的组件，先添加简单的页面元素。这里面添加的组件一定要和上面配置的路由中保持一致。在src文件夹下的views文件夹下创建teacher文件夹，然后在该文件夹下分别创建list、add组件。创建完该组件后首先添加简单的页面元素

3.添加了简单的页面元素后，就需要在api文件中创建对应的js文件向后端发送请求。此文件命名为teacher.js

import request from '@/utils/request'
export default {
    // 带条件的分页查询讲师列表
    getTeacherPageVo(current, limit, teacherQuery){
        return request({
            url: `/eduservice/eduteacher/getTeacherPageVo/${current}/${limit}`,
            method: 'post',
            data: teacherQuery // 转换成json传递
          })
        },
    // 根据id删除讲师
    delTeacher(id){
        return request({
            url: `/eduservice/eduteacher/${id}`,
            method: 'delete'
          })
        },
    // 添加讲师
    addTeacher(eduTeacher){
        return request({
            url: `/eduservice/eduteacher/addTeacher`,
            method: 'post',
            data: eduTeacher // 转换成json传递
          })
    },
    // 根据id查询讲师
    getTeacherById(id){
        return request({
            url: `/eduservice/eduteacher/getTeacherById/${id}`,
            method: 'get'
          })
    },
    // 修改讲师
    updateTeacher(eduTeacher){
        return request({
            url: `/eduservice/eduteacher/updateTeacher`,
            method: 'post',
            data: eduTeacher // 转换成json传递
          })
    }
  }

 4.发送请求的api创建完成后，就需要对页面从后端获取的数据进行渲染

list.vue的文件内容如下

 
<script>
import teacher from "@/api/teacher";
export default {
  data() {
    return {
      current: 1, // 当前页
      limit: 10, // 每页显示多少行
      teacherQuery: {}, //查询条件
      list: [], //数据列表
      total: 0
    };
  },
  created() {
    this.getTeacherPageQuery();
  },
  methods: {
    // 带条件的分页查询讲师列表
    getTeacherPageQuery(current = 1) {
      this.current = current;
      teacher
        .getTeacherPageVo(this.current, this.limit, this.teacherQuery)
        .then(response => {
          console.log(response);
          this.list = response.data.list;
          this.total = response.data.total;
        });
    },
    // 清空
    resetData() {
      this.teacherQuery = {};
      this.getTeacherPageQuery();
    },
    // 删除讲师
    removeDataById(id) {
      this.$confirm("此操作将永久删除该讲师, 是否继续?", "提示", {
        confirmButtonText: "确定",
        cancelButtonText: "取消",
        type: "warning"
      })
        .then(() => {
        teacher.delTeacher(id).then(response => {
        console.log("删除成功...");
 
        this.getTeacherPageQuery();
          this.$message({
            type: "success",
            message: "删除成功!"
          });
        })
        .catch(() => {
          this.$message({
            type: "info",
            message: "已取消删除"
          });
        });
      
      });
    }
  }
};
script>
 
 
 

 add.vue的文件内容如下

<script>
import teacher from "@/api/teacher";
export default {
  data() {
    return {
      eduTeacher: {}, //表单数据
      saveBtnDisabled: false // 按钮是否不可操作
    };
  },
  created() {
    if (this.$route.params && this.$route.params.id) {
      console.log("this.$route.params.id:" + this.$route.params.id);
      teacher.getTeacherById(this.$route.params.id).then(response => {
        this.eduTeacher = response.data.eduTeacher;
      });
    } else {
    }
  },
  methods: {
    saveOrUpdate() {
        if(this.eduTeacher.id){
            // 如果id存在就进行修改操作
            this.updateTeacherInfo()
        }else{
            // 如果id不存在就进行添加操作
            this.addTeacher()
        }
    },
    // 添加讲师
    saveTeacher() {
      teacher.addTeacher(this.eduTeacher).then(response => {
        // 提示成功
        this.$message({
          type: "success",
          message: "添加成功!"
        });
 
        // 路由跳转
        this.$router.push({ path: "/teacher/list" });
      });
    },
    // 修改讲师
    updateTeacherInfo() {
      teacher.updateTeacher(this.eduTeacher).then(response => {
        // 提示成功
        this.$message({
          type: "success",
          message: "修改成功!"
        });
 
        // 路由跳转
        this.$router.push({ path: "/teacher/list" });
      });
    }
  }
};
script>
 

 对上面的添加和修改模块进行说明：因为添加和修改模块使用的是同一个组件add.vue。但是二者在使用该组件时使用方法不同。这个页面有一个保存按钮。当进行新增讲师的时候，进入该组件时表单里面的各项都是空的，再填写完成表单之后，点击保存按钮，会触发保存saveOrUpdate()的方法，但是执行该方法不能确定是进行新增操作还是进行修改操作。在讲师管理页面中有一个修改的按钮，点击后会进行路由跳转操作，并且这个路由跳转需要携带这一行记录的id。再点击修改按钮后会携带需要修改的这条记录的id然后跳转到新增页面并进行数据回显。要想完成此操作必须要在router中增加携带参数的路由

{
        path: 'add',
        name: '添加讲师',
        component: () => import('@/views/teacher/add'),
        meta: { title: '添加讲师', icon: 'tree' }
      },
      {
        path: 'add/:id',
        name: 'EduTeacherEdit',
        component: () => import('@/views/teacher/add'),
        meta: { title: '编辑讲师', noCache: true },
        hidden: true
      }

 这两个路由是路由到同一个页面，但是功能不同，一个是带参数一个不带参数。

 this.$router.push({ path: "/teacher/list" });

上面是进行路由跳转的语句。新增和修改都会使用上面的语句进行路由跳转。但是在跳转的过程中修改是带参数id的，新增不带参数直接跳转到该页面。如果携带了参数id要调用后台根据id查询的方法进行数据回显。数据回显的时候通过判断this.$route.params是否为空以this.$route.params.id是否存在来判断。如果这两个值都存在，说明是进行修改操作，在这个页面一加载时就进行数据回显；如果这两个值不存在就进行的新增操作，页面加载时所有的表单项都是空的。这个页面保存按钮如何判断是新增还是修改操作。通过判断id是否存在，存在就是进行修改操作，通过js调用后台的修改接口；不存在就是进行新增操作，通过后台调用js的新增接口。保存完成后又会进行页面跳转，跳转到讲师列表