vue判斷是新增還是修改


新增路徑

{
        path: 'save',
        name: '添加講師',
        component: () => import('@/views/edu/teacher/save'),
        meta: { title: '添加講師', icon: 'tree' }
      }

修改路徑

<router-link :to="'/teacher/edit/'+scope.row.id">
    <el-button type="primary" size="mini" icon="el-icon-edit">修改</el-button>
</router-link>

根據路由和id的值判斷是新增還是修改

同一個頁面,created只執行一次

點擊確定

點擊菜單欄的新增(這里只走watch,created方法不走)

點擊確定(如果不用watch,這里不是顯示空白的新增頁面,而是帶有數據的修改的數據)

vue頁面

列表頁面

<template>
  <div class="app-container">
    <!--查詢表單-->
    <el-form :inline="true">
      <el-form-item>
        <el-input v-model="searchData.name" placeholder="講師" />
      </el-form-item>

      <el-form-item>
        <el-select v-model="searchData.level" clearable placeholder="頭銜">
          <el-option value="1" label="高級講師" />
          <el-option value="2" label="首席講師" />
        </el-select>
      </el-form-item>

      <el-form-item label="入駐時間">
        <el-date-picker
          v-model="searchData.begin"
          placeholder="開始時間"
          value-format="yyyy-MM-dd"
        />
      </el-form-item>
      <el-form-item label="-">
        <el-date-picker
          v-model="searchData.end"
          placeholder="結束時間"
          value-format="yyyy-MM-dd"
        />
      </el-form-item>
      <el-form-item>
        <el-button type="primary" icon="el-icon-search" @click="pageList()"
          >查詢</el-button
        >
        <el-button type="default" @click="resetData()">清空</el-button>
      </el-form-item>
    </el-form>

    <div>
      <el-button type="danger" size="mini" @click="batchRemove()"
        >批量刪除</el-button
      >
    </div>
    <!-- 表格 -->
    <el-table
      :data="list"
      border
      stripe
      @selection-change="handleSelectionChange"
    >
      <el-table-column type="selection" />
      <el-table-column label="ID" width="50">
        <!-- 使用連續的序號 -->
        <template slot-scope="scope">
          {{ (currentPage - 1) * limit + scope.$index + 1 }}
        </template>
      </el-table-column>
      <el-table-column prop="name" label="名稱" width="80" />
      <el-table-column label="頭銜" width="90">
        <template slot-scope="scope">
          <span v-if="scope.row.level === 1">
            <el-tag type="primary" size="mini">高級講師</el-tag>
          </span>
          <span v-else>
            <el-tag type="success" size="mini">首席講師</el-tag>
          </span>
        </template>
      </el-table-column>
      <el-table-column prop="intro" label="資歷" />
      <el-table-column prop="sort" label="排序" width="50" />
      <el-table-column prop="joinDate" label="入駐時間" width="160" />
      <el-table-column label="操作" width="150">
        <template slot-scope="scope">
          <el-button type="primary" size="mini" @click="toUpdate(scope.row.id)"
            >更改</el-button
          >
          <el-button type="danger" size="mini" @click="removeById(scope.row)"
            >刪除</el-button
          >
        </template>
      </el-table-column>
    </el-table>
    <!--分頁組件-->
    <el-pagination
      :current-page="currentPage"
      :page-size="limit"
      :total="total"
      :page-sizes="[5, 10, 15, 20]"
      style="padding: 12px 8px; text-align: center"
      layout="sizes, prev, pager, next, jumper, ->, total"
      @size-change="handleSizeChange"
      @current-change="handleCurrentChange"
    />
  </div>
</template>
 

<script>
import teacherApi from "@/api/teacher";
export default {
  data() {
    return {
      list: [], //列表數據
      total: 0,
      currentPage: 1, //當前頁
      limit: 10, //每頁記錄數
      searchData: {},
      idList: null,
    };
  },
  created() {
    this.pageList();
  },
  methods: {
    //跳轉到修改頁面
 toUpdate(id) {
      this.$router.push({ path: `/teacher/editTeacher/${id}` });
    },
    //批量刪除
    batchRemove() {
      debugger;
      if (!this.idList || this.idList.length <= 0) {
        this.$message({
          type: "info",
          message: "請先選擇要刪除的數據!",
        });
        return false;
      }
      let arrayIds = [];
      this.idList.forEach((element) => {
        arrayIds.push(element.id);
      });

      this.$confirm("此操作將永久刪除, 是否繼續?", "提示", {
        confirmButtonText: "確定",
        cancelButtonText: "取消",
        type: "warning",
      })
        .then(() => {
          //刪除api
          teacherApi.batchRemove(arrayIds).then((res) => {
            debugger;
            if (res.code === 20000 && res.data) {
              this.$message({
                type: "info",
                message: "刪除成功: ",
              });
              this.pageList();
            } else {
              this.$message({
                type: "info",
                message: "刪除失敗: ",
              });
            }
          });
        })
        .catch(() => {
          this.$message({
            type: "info",
            message: "已取消刪除",
          });
        });
    },
    //多選
    handleSelectionChange(idList) {
      this.idList = idList;
    },
    //刪除
    removeById(data) {
      this.$confirm("此操作將永久刪除" + data.name + ", 是否繼續?", "提示", {
        confirmButtonText: "確定",
        cancelButtonText: "取消",
        type: "warning",
      })
        .then(() => {
          //刪除api
          teacherApi.removeById(data.id).then((res) => {
            if (res.code === 20000 && res.data) {
              this.$message({
                type: "info",
                message: "刪除成功: ",
              });
              this.pageList();
            } else {
              this.$message({
                type: "info",
                message: "刪除失敗: ",
              });
            }
          });
        })
        .catch(() => {
          this.$message({
            type: "info",
            message: "已取消刪除",
          });
        });
    },
    resetData() {
      this.searchData = {};
      this.pageList();
    },
    //改變數量
    handleSizeChange(size) {
      this.limit = size;
      this.pageList();
    },
    //改變頁碼
    handleCurrentChange(currentPage) {
      this.currentPage = currentPage;
      this.pageList();
    },

    //分頁查詢
    pageList() {
      teacherApi
        .pageList(this.currentPage, this.limit, this.searchData)
        .then((res) => {
          if (res.code === 20000 && res.data) {
            this.$message({
              type: "info",
              message: "查詢成功: ",
            });
            this.list = res.data.list;
            this.total = res.data.total;
          } else {
            this.$message({
              type: "info",
              message: "查詢失敗: ",
            });
          }
        })
        .catch((e) => {
          this.$message({
            type: "info",
            message: "查詢異常",
          });
        });
    },
  },
};
</script>

新增和修改頁面(一個頁面)

<template>
  <div class="app-container">
    講師添加
    <el-form label-width="120px">
      <el-form-item label="活動名稱">
        <el-input v-model="teacher.name" />
      </el-form-item>
      <el-form-item label="入駐時間">
        <el-date-picker
          type="date"
          placeholder="選擇日期"
          v-model="teacher.joinDate"
          value-format="yyyy-MM-dd"
        ></el-date-picker>
      </el-form-item>

      <el-form-item label="排序">
        <el-input v-model="teacher.sort" :min="0" />
      </el-form-item>
      <el-form-item label="講師頭銜">
        <el-select v-model="teacher.level" clearable placeholder="講師頭銜">
          <el-option :value="1" label="高級講師" />
          <el-option :value="2" label="首席講師" />
        </el-select>
      </el-form-item>

      <el-form-item label="講師簡介">
        <el-input v-model="teacher.intro" />
      </el-form-item>

      <el-form-item label="講師資歷">
        <el-input v-model="teacher.career" />
      </el-form-item>

      <el-form-item>
        <el-button
          type="primary"
          :disabled="saveBtnDisabled"
          @click="saveOrUpdate()"
          >{{ saveOrUpdateText }}</el-button
        >
      </el-form-item>
    </el-form>
  </div>
</template>

<script>
import teacherApi from "@/api/teacher";
export default {
  data() {
    return {
      saveBtnDisabled: false,
      saveOrUpdateText: "保存",
      //講師對象
      teacher: {
        name: "",
        intro: "", //講師簡介
        career: "", //講師資歷
        level: 1, //頭銜 1高級講師 2首席講師
        avatar: "", //講師頭像
        sort: 0,
        joinDate: "", //入駐時間
      },
    };
  },
  created() {
    //created之執行一次
    alert(1);
    this.init();
  },
  watch: {
    //路由每次變化都執行
    $route(to, from) {
      alert(2);
      this.init();
    },
  },
  methods: {
    init() {
      //修改就把詳情查出來,否則頁面是新增頁面,新增頁面對象數據是空
      if (this.$route.params && this.$route.params.id) {
        this.getDetail(this.$route.params.id);
        this.saveOrUpdateText = "修改";
      } else {
        this.teacher = {};
        this.saveOrUpdateText = "保存";
      }
    },
    //同一個頁面,判斷是新增還是修改
    saveOrUpdate() {
      if (this.teacher.id) {
        //更新
        this.update();
      } else {
        //新增
        this.save();
      }
    },
    //進入到修改頁面,需要回顯的數據
    getDetail(id) {
      teacherApi.getDetail(id).then((res) => {
        debugger;
        if (res.code === 20000 && res.data.dataInfo) {
          debugger;
          this.teacher = res.data.dataInfo;
          this.$message({
            type: "info",
            message: "數據初始化成功",
          });
        } else {
          this.$message({
            type: "info",
            message: "數據初始化失敗",
          });
        }
      });
    },
    //新增
    save() {
      teacherApi.save(this.teacher).then((res) => {
        if (res.code === 20000 && res.data) {
          this.$message({
            type: "info",
            message: "添加成功",
          });
          this.$router.push({ path: "/teacher/list" });
        } else {
          this.$message({
            type: "info",
            message: "添加失敗",
          });
        }
      });
    },
    //修改
    update() {
      teacherApi.update(this.teacher).then((res) => {
        if (res.code === 20000 && res.data) {
          this.$message({
            type: "info",
            message: "修改成功",
          });
          this.$router.push({ path: "/teacher/list" });
        } else {
          this.$message({
            type: "info",
            message: "修改失敗",
          });
        }
      });
    },
  },
};
</script>

<style>
</style>

路由

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 redirct in the breadcrumb
* name:'router-name'             the name is used by <keep-alive> (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: '在線教育',
    hidden: true,
    children: [{
      path: 'dashboard',
      component: () => import('@/views/dashboard/index')
    }]
  },

  {
    path: '/teacher',
    component: Layout,
    redirect: '/teacher/list',
    name: 'teacher',
    meta: { title: '講師管理', icon: 'peoples' },
    children: [
      {
        path: 'list',
        name: 'teacherList',
        component: () => import('@/views/teacher/list'),
        meta: { title: '講師列表', icon: 'peoples' }
      },
      {
        path: 'addTeacher',
        name: 'addTeacher',
        component: () => import('@/views/teacher/form'),
        meta: { title: '添加講師', icon: 'tree' }
      },
      {
        path: 'editTeacher/:id',
        name: 'editTeacher',
        component: () => import('@/views/teacher/form'),
        meta: { title: '編輯講師', icon: 'edit' },
        hidden: true
      }
    ]
  },

  {
    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: '*', redirect: '/404', hidden: true }
]

export default new Router({
  // mode: 'history', //后端支持可開
  scrollBehavior: () => ({ y: 0 }),
  routes: constantRouterMap
})

 


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