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本文介绍: 【代码】一套后台管理系统的入门级的增删改查（vue3组合式api+elemment–plus）

一、页面示意：

图一

图二

二、组件结构

三、代码

1、列表组件: index.vue

<template>
    <h1>增删改查案例</h1>
    <div>
        <!--查询条件  -->
        <el-form :model="searchData" label-width="40px" :inline="true">
            <el-form-item label="书号">
                <el-input v-model="searchData.id" />
            </el-form-item>
            <el-form-item label="书名">
                <el-input v-model="searchData.name" />
            </el-form-item>
            <el-form-item label="作者">
                <el-input v-model="searchData.author" />
            </el-form-item>
            <el-form-item label="价格">
                <el-input v-model="searchData.minprice" />
            </el-form-item>
            <el-form-item label="-->">
                <el-input v-model="searchData.maxprice" />
            </el-form-item>
            <el-form-item>
                <el-button type="primary" @click="searchFn">查询</el-button>
                <el-button @click="showAdd">添加</el-button>
            </el-form-item>
        </el-form>
    </div>
    <div>
        <!-- 书籍列表 -->
        <el-table :data="bookData" stripe style="width: 100%">
            <el-table-column prop="id" label="书号" width="180" />
            <el-table-column prop="name" label="书名" width="180" />
            <el-table-column prop="author" label="作者" />
            <el-table-column prop="price" label="价格" />
            <el-table-column  label="类型" >
                <template #default="scope">
                    <span>{{typeObj[scope.row.type]}}</span>
                </template>
            </el-table-column>
            <el-table-column label="图片">
                <template #default="scope">
                    <img :src="scope.row.img" style="width: 100px;height: 100px" />
                </template>
            </el-table-column>

            <el-table-column fixed="right" label="操作" width="120">
                <template #default="scope">
                    <el-button link type="primary" size="small" @click="showEdit(scope.row.id)">
                        编辑
                    </el-button>
                    <el-button link type="primary" size="small" @click.prevent="deleteBook(scope.row.id)">
                        删除
                    </el-button>
                </template>
            </el-table-column>
        </el-table>
        <el-drawer v-model="drawer" title="添加书籍" direction="rtl" :before-close="handleClose">
            <AddBook @close="closeFn" @ok="okFn"></AddBook>
        </el-drawer>
        <el-drawer v-model="drawerEdit" title="修改书籍" direction="rtl" >
            <EditBook :id="editId" @ok="editOkFn" @close="editCloseFn" ></EditBook>
        </el-drawer>
    </div>
</template>

<script  setup>
import { reactive, onMounted,ref } from "vue";
import { getBooksApi, getBooksByCondationApi, deleteBookApi } from "@/api/crud";
import AddBook from "./Add.vue";
import EditBook from "./edit.vue";


const typeObj = {
    "new":"最新",
    "hot":"热卖"
}


// 书籍数据
let bookData = reactive([]);

//一、 获取书籍信息
const getBooks = () => {
    getBooksApi()
        .then(res => {
            if (res.data) {
                console.log("bookData前", bookData);
                // bookData = res.data;
                bookData.length = 0;
                bookData.push(...res.data);
                console.log("bookData后", bookData);
            }
        })
        .catch(err => {
            console.log("获取数据出错", err);
        })
}
onMounted(() => {
    getBooks();
})

// 二、查询书籍
const searchData = reactive({
    "id": "",
    "name": "",
    "author": "",
    "minprice": "",
    "maxprice": ""
})

const searchFn = () => {

    const temp = {};
    for (const key in searchData) {
        if (searchData[key] !== "") {
            temp[key] = searchData[key];
        }
    }

    if (temp["minprice"]) {
        delete temp["minprice"];
        temp["price_gte"] = searchData.minprice;
    }

    if (temp["maxprice"]) {
        delete temp["maxprice"];
        temp["price_lte"] = searchData.maxprice;
    }


    getBooksByCondationApi(temp)
        .then(res => {
            if (res.data) {
                bookData.length = 0;
                bookData.push(...res.data);
            }
        })
}


// 三、删除书籍
const deleteBook = (id) => {

    deleteBookApi(id)
        .then(res => {
            console.log("删除的返回res", res);
            // 删除成功后，重新获取数据
            getBooks();
        })
}


// 四、添加
const drawer = ref(false)

const handleClose = (done) => {
  ElMessageBox.confirm('Are you sure you want to close this?')
    .then(() => {
      done()
    })
    .catch(() => {
      // catch error
    })
}

// 显示添加页面
const showAdd=()=>{
    drawer.value=true;
}

const closeFn=()=>{
    drawer.value = false;
}

const okFn=()=>{
    closeFn();
    getBooks();
}

// 五、修改
const drawerEdit = ref(false);
const editId = ref("");//修改的书籍的id

// 显示修改页面
const showEdit=(id)=>{
    editId.value=id;
    drawerEdit.value=true;
}

const editCloseFn=()=>{
    editId.value ="";
    drawerEdit.value = false;
}

const editOkFn=()=>{
    editCloseFn();
    getBooks();
}


</script>


<style lang="css" scoped></style>

2、添加组件：add.vue

<template>
    <el-form ref="formRef" :model="newBook" label-width="120px" :rules="rules">
        <el-form-item label="书号" prop="id">
            <el-input v-model="newBook.id" />
        </el-form-item>
        <el-form-item label="书名" prop="name">
            <el-input v-model="newBook.name" />
        </el-form-item>
        <el-form-item label="作者" prop="author">
            <el-input v-model="newBook.author" />
        </el-form-item>
        <el-form-item label="价格" prop="price">
            <el-input v-model="newBook.price" />
        </el-form-item>
        <el-form-item label="图片" prop="img">
            <el-input v-model="newBook.img" />
        </el-form-item>
        <el-form-item label="类型" prop="type">
            <!-- <el-input v-model="newBook.type" /> -->
            <el-select v-model="newBook.type" class="m-2" placeholder="请选择书籍类型" size="large">
                <!-- <el-option v-for="item in booktypes" :key="item.id" :label="item.name" :value="item.value" /> -->
                <el-option label="最新" value="new" />
                <el-option label="热卖" value="hot" />
            </el-select>
        </el-form-item>
        <el-form-item>
            <el-button type="primary" @click="addBookFn(formRef)">添加</el-button>
            <el-button @click="cancelFn">取消</el-button>
        </el-form-item>
    </el-form>
</template>
    
<script  setup>
import { reactive, ref } from 'vue';
import { addBookApi,getBookTypeApi } from "@/api/crud"

const emit = defineEmits(['close', "ok"]);

const booktypes = reactive([]);

const getBookType = () => {
    getBookTypeApi()
    .then(res=>{
        if(res.data){
            booktypes.length=0;
            booktypes.push(...res.data);
        }
    })
}

getBookType();

const formRef = ref();
//  定义添加的书籍
const newBook = reactive({
    "id": "",
    "name": "",
    "author": "",
    "price": 0,
    "img": "",
    "type": ""
})



// 表单验证的规则
const rules = reactive({
    "id": [
        { required: true, message: '请输入书号', trigger: 'blur' }
    ],
    "name": [
        { required: true, message: '请输入书名', trigger: 'blur' }
    ],
    "author": [
        { required: true, message: '请输入作者', trigger: 'blur' }
    ],
    "price": [
        { required: true, message: '请输入价格', trigger: 'blur' }
    ],
    "img": [
        { required: true, message: '请输入图片地址', trigger: 'blur' }
    ],
    "type": [
        { required: true, message: '请输入类型', trigger: 'blur' }
    ],
})


const addBookFn = (formEl) => {
    if (!formEl) {
        return;
    }
    console.log("newBook",newBook);

    formEl.validate((isOk) => {
        if (isOk) {
            addBookApi(newBook)
                .then(res => {
                    console.log(res);
                    if (res.data) {
                        // 添加成功
                        alert("添加成功！");
                        // 关闭弹窗
                        emit("ok");
                    }
                })
                .catch(err => {

                })
        }
    })


}

const cancelFn = () => {
    emit('close');
}



</script>

3、编辑组件：edit.vue

<template>
    <el-form ref="formRef" :model="editBook" label-width="120px" :rules="rules">
        <el-form-item label="书号" prop="id">
            <el-input v-model="editBook.id" />
        </el-form-item>
        <el-form-item label="书名" prop="name">
            <el-input v-model="editBook.name" />
        </el-form-item>
        <el-form-item label="作者" prop="author">
            <el-input v-model="editBook.author" />
        </el-form-item>
        <el-form-item label="价格" prop="price">
            <el-input v-model="editBook.price" />
        </el-form-item>
        <el-form-item label="图片" prop="img">
            <el-input v-model="editBook.img" />
        </el-form-item>
        <el-form-item label="类型" prop="type">
            <el-input v-model="editBook.type" />
        </el-form-item>
        <el-form-item>
            <el-button type="primary" @click="editBookFn(formRef)">修改</el-button>
            <el-button @click="cancelFn">取消</el-button>
        </el-form-item>
    </el-form>
</template>
    
<script  setup>
import { reactive, ref,watch } from 'vue';
import { getBookDetailApi,editBookApi } from '@/api/crud';

const props = defineProps(["id"]);

const formRef = ref();

//  定义修改的书籍
const editBook = reactive({
    "id": "",
    "name": "",
    "author": "",
    "price": 0,
    "img": "",
    "type": ""
})


// 获取当前修改的书籍信息
const getBookDetail = async () => {
    try {
        const res = await getBookDetailApi(props.id);
        // editBook = res.data;
        for(let key in editBook){
            editBook[key] = res.data[key];
        }

    } catch (err) {
        console.log("服务器出错",err);
    }
}

console.log("props",props);

watch(props,()=>{
    console.log("props.id变了");
    getBookDetail();
},{deep:true,immediate:true})

const emit = defineEmits(['close', "ok"]);

// 表单验证的规则
const rules = reactive({
    "id": [
        { required: true, message: '请输入书号', trigger: 'blur' }
    ],
    "name": [
        { required: true, message: '请输入书名', trigger: 'blur' }
    ],
    "author": [
        { required: true, message: '请输入作者', trigger: 'blur' }
    ],
    "price": [
        { required: true, message: '请输入价格', trigger: 'blur' }
    ],
    "img": [
        { required: true, message: '请输入图片地址', trigger: 'blur' }
    ],
    "type": [
        { required: true, message: '请输入类型', trigger: 'blur' }
    ],
})

const editBookFn = (formEl) => {
    if (!formEl) {
        return;
    }

    formEl.validate((isOk) => {
        if (isOk) {
            editBookApi(props.id,editBook)
                .then(res => {
                    console.log(res);
                    if (res.data) {
                        alert("修改成功！");
                        // 关闭弹窗
                        emit("ok");
                    }
                })
                .catch(err => {

                })
        }
    })


}

const cancelFn = () => {
    emit('close');
}


</script>

4、补充【api和axios封装】：api/crud.js；utils/serviceMock.js

api/crud.js

import service from "@/utils/serviceMock.js";


// 获取所有书籍
export const getBooksApi = ()=>service.get('/books');

// 根据编号获取书籍详情
export const getBookDetailApi = (id)=>service.get('/books/'+id);

// 查询书籍
export const getBooksByCondationApi = (params)=>service.get('/books',{params});

// 删除书籍
export const deleteBookApi = (id)=>service.delete('/books/'+id);


// 添加书籍
export const addBookApi = (data)=>service.post('/books',data);


// 修改书籍
export const editBookApi = (id,data)=>service.put('/books/'+id,data);


// 获取书籍类型
export const getBookTypeApi = ()=>service.get('/bookType');
utils/serviceMock.js
import axios from 'axios';
import store from '@/store';


const service = axios.create({
    baseURL:"http://localhost:3000"
})

// 请求拦截器：所有请求的公共业务
service.interceptors.request.use(config=>{
    store.commit("showLoading");
    return config;
})


// 响应拦截器
service.interceptors.response.use((res)=>{
    store.commit("hideLoading");
    // loading.close();
    return res;
})



export default service;

5、mock数据，用json–server

{
      "books": [
    {
      "id": "878912",
      "name": "水浒1",
      "author": "施耐庵",
      "price": 51.5,
      "img": "/src/assets/imgs/01.jpg",
      "type": "hot"
    },
    {
      "id": "878913",
      "name": "红楼梦",
      "author": "曹雪芹2",
      "price": 51.8,
      "img": "/src/assets/imgs/01.jpg",
      "type": "hot"
    },
    {
      "id": "878917",
      "name": "论语1",
      "author": "王锐1",
      "price": "5.38",
      "img": "/imgs/img3.jpg",
      "type": "new"
    },
    {
      "id": "878918",
      "name": "老子",
      "author": "李家恒",
      "price": 54.8,
      "img": "/imgs/img4.jpg",
      "type": "new"
    },
    {
      "id": "878919",
      "name": "孟子2",
      "author": "李家恒",
      "price": 54.8,
      "img": "/images/img4.jpg",
      "type": "new"
    },
    {
      "id": "878920",
      "name": "孟子3",
      "author": "李家恒",
      "price": 54.8,
      "img": "/images/img4.jpg",
      "type": "new"
    },
    {
      "id": "878921",
      "name": "孟子4",
      "author": "李家恒",
      "price": 54.8,
      "img": "/images/img4.jpg",
      "type": "new"
    },
    {
      "id": "878922",
      "name": "孟子5",
      "author": "李家恒",
      "price": 54.8,
      "img": "/images/img4.jpg",
      "type": "new"
    },
    {
      "id": "878923",
      "name": "孟子6",
      "author": "李家恒",
      "price": 54.8,
      "img": "/images/img4.jpg",
      "type": "new"
    },
    {
      "id": "01008",
      "name": "霸道总裁爱上我",
      "author": "曹宇",
      "price": "9.9",
      "img": "/src/imgs/01.jpg",
      "type": "hot"
    },
    {
      "id": "01009",
      "name": "西厢记",
      "author": "赵蕊",
      "price": "10.9",
      "img": "/src/assets/imgs/01.jpg",
      "type": "hot"
    },
    {
      "id": "01010",
      "name": "钢铁是怎样炼成的",
      "author": "奥斯特洛夫斯基",
      "price": "11.9",
      "img": "/src/assets/imgs/02.jpg",
      "type": "hot"
    },
    {
      "id": "01011",
      "name": "12",
      "author": "22",
      "price": 0,
      "img": "1",
      "type": "hot"
    },
    {
      "id": "01012",
      "name": "假如我是亿万富翁",
      "author": "金莉",
      "price": "1000",
      "img": "/src/assets/imgs/01.jpg",
      "type": "new"
    }
  ],
}

原文地址:https://blog.csdn.net/jiang7701037/article/details/134701259

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