我的Vue之旅 11 Vuex 实现购物车

Vue

CartView.vue script

数组的filter函数需要return显式返回布尔值，该方法得到一个新数组。
使用Vuex store的modules方式，注意读取状态的方式 this.$store.state.cart.items
刷新页面后state状态还原，需要用session保存状态（TODO）
axios 发出 get 请求，第二个参数对象的 params 字段值显式使用 JSON.stringify 进行转化，如果不使用会表示成 xxx?items=xxx&items=xxx&items=xxx

import { defineComponent } from "vue";export default defineComponent({  name: "CartView",  components: {},  methods: {    deleteItem(id: number) {      this.$store.dispatch("del", id);      console.log(this.$store.state.cart.items);      this.items = this.items.filter((item) => {        return item.id != id; // @ return      });    },  },  data() {    return {      days: 29,      hours: 8,      minutes: 20,      discount: 24,      items: [        {          id: 201,          img: "https://xiaonenglife.oss-cn-hangzhou.aliyuncs.com/static/pic/2022/11/20221123235723_201.png",          name: "Family",          price: 2.99,          author: "Tim Sheinman",          category: "Puzzle",        }      ],    };  },  computed: {    cost() {      let total = 0;      this.items.forEach((item) => {        total += item.price;      });      total *= (100 - this.discount) / 100;      const res = total.toFixed(2);      return res;    },  },  created() {    this.axios      .get("/game/query", {        params: {          items: JSON.stringify(this.$store.state.cart.items),        },      })      .then((response) => {        if (!response.data) {          console.log("无数据");          return;        }        this.items = [];        response.data.forEach((item: any) => {          this.items.push({            id: item.id,            img: item.img,            name: item.title,            price: item.price,            author: item.author,            category: item.category,          });        });      })      .catch((err) => {        console.log(err);      });  },});

CartView.vue template

            My Cart              Buy everything for      ${{ cost }}!       Save {{ discount }}%!                      Buy all for ${{ cost }}            offer ends in                        {{ days }}          DAYS                          {{ hours }}          HOURS                          {{ minutes }}          MINUTES                            includes the following items:                                                            {{ value.name }}                              ${{ value.price }}                                                    {{ value.author }}                                      {{ value.category }}

store/cart.ts

VUE里面的export default 是什么_啊了个呜的博客-CSDN博客

const state = {  items: [    // 201, 202, 203, 204  ]}const mutations = {  add(state: any, param: number) {    if (!state.items.includes(param)) {      state.items.push(param)    }  },  del(state: any, param: number) {    if (state.items.indexOf(param) != -1) {      state.items.splice(state.items.indexOf(param), 1)    }  }}const actions = {  add(context: any, param: number) {  // 可以 {commit} 解构简化    context.commit('add', param)  },  del(context: any, param: number) {     context.commit('del', param)  }}const cart = {  state,  mutations,  actions}export default cart

store/index.ts

import { createStore } from 'vuex'import cart from './cart'export default createStore({  modules: {    cart: cart  }})

Property ‘$store‘ does not exist on type ‘CreateComponentPublicInstance

在src文件夹下新建文件夹vue.d.ts

// vuex.d.tsimport { ComponentCustomProperties } from '@/vue'import { Store } from 'vuex'declare module '@vue/runtime-core' {  // declare your own store states  interface State {    cart  }  // provide typings for `this.$store`  interface ComponentCustomProperties {    $store: Store  }}

三种方法实现Vue路由跳转时自动定位在页面顶部

// 跳转后自动返回页面顶部router.afterEach(() => {window.scrollTo(0,0);})

const router = new VueRouter({routes:[...],scrollBehavior () {// return返回期望滚动到的位置的坐标return { x: 0, y: 0 }}})

router.beforeEach((to, from, next) => {    // chrome兼容document.body.scrollTop = 0// firefox兼容document.documentElement.scrollTop = 0// safari兼容window.pageYOffset = 0next()})

Golang Ginstructs/game.go

package structstype Game struct {ID       int64   `db:"id" json:"id"`Title    string  `db:"title" json:"title"`Text     string  `db:"text" json:"text"`Img      string  `db:"img" json:"img"`Author   string  `db:"author" json:"author"`Category string  `db:"category" json:"category"`Price    float64 `db:"price" json:"price"`}

controller/game.go

package controllerimport ("encoding/json""fmt""github.com/gin-gonic/gin""wolflong.com/vue_gin/structs""wolflong.com/vue_gin/variable")func QueryGame(c *gin.Context) {db := variable.DBitems_ := c.Query("items")var items []int64err := json.Unmarshal([]byte(items_), &items)if err != nil || len(items) == 0 {c.JSON(501, gin.H{"message": "failure items",})c.Abort()return}// fmt.Println(items)stmt := `select id,title,author,category,img,price from game where id in (`for i, v := range items {stmt += fmt.Sprintf("%d", v)if i != len(items)-1 {stmt += ","}}stmt += ")"rows, err := db.Query(stmt)checkError(err)defer rows.Close()var res []structs.Gamefor rows.Next() {var c structs.Gameerr = rows.Scan(&c.ID, &c.Title, &c.Author, &c.Category, &c.Img, &c.Price)checkError(err)res = append(res, c)}c.JSON(200, res)}

router/router.go

新增路由

game := r.Group("/game"){    game.GET("/query", controller.QueryGame)}

Mysql 建表

DROP DATABASE VUE;create database if not exists vue;use vue;CREATE TABLE gameblog (  id INT PRIMARY KEY AUTO_INCREMENT,  title VARCHAR(255),  text VARCHAR(255),  img VARCHAR(255));insert into gameblog(title,text,img) values ("Games of the Month: surrealist solitaire puzzles","What’s that? You need more games? I hear you, anonymous hapi fan.We’ve reached the part of the year when games start coming out fast","https://xiaonenglife.oss-cn-hangzhou.aliyuncs.com/static/pic/2022/11/20221102184434_1.jpg"),("Games of the Month: Puzzles!","Sometimes you need a good puzzle game, just something to throw all of your attention at and ignore anything else going on. Well if that sometime for you is right now, then you’re in luck because in this Games of the Month","https://xiaonenglife.oss-cn-hangzhou.aliyuncs.com/static/pic/2022/11/20221102184434_2.jpg"),("The next hapi Creator Day is July 29th!","I don’t think I’m allowed to make the entire body of this post “Thenext itch.io Creator Day is taking place on Friday July 29th.” I mean it’s true, we are hosting the next itch.io Creator Day on Friday July 29th but I should probably write more here.","https://xiaonenglife.oss-cn-hangzhou.aliyuncs.com/static/pic/2022/11/20221102184434_3.jpg");select * from gameblog;drop table if exists game;CREATE TABLE game (  id INT PRIMARY KEY AUTO_INCREMENT,  title VARCHAR(255),  text VARCHAR(255),  img VARCHAR(255),  author VARCHAR(255) default "", # TODO ID  category VARCHAR(255) default "", # TODO ID  price decimal(6,2) default 0,  web boolean default 0  # TODO 发布时间  # TODO 浏览量  # TODO 评论量  # TODO 热度综合指标);CREATE TABLE tag (  id INT PRIMARY KEY AUTO_INCREMENT,  title VARCHAR(255));CREATE TABLE gametag (  gameid INT,  tagid INT);# TODO 外键insert into game(id,title,author,category,text,img,price,web) values(1,"Late Night Mop","","","A haunted house cleaning simulator.","https://xiaonenglife.oss-cn-hangzhou.aliyuncs.com/static/pic/2022/11/20221102193135_1.png",0,0),(2,"an average day at the cat cafe","A haunted house cleaning simulator.","","","https://xiaonenglife.oss-cn-hangzhou.aliyuncs.com/static/pic/2022/11/20221102193135_2.png",0,1),(3,"Corebreaker","A fast-paced action-platform shooter game with roguelike elements.","","","https://xiaonenglife.oss-cn-hangzhou.aliyuncs.com/static/pic/2022/11/20221102193135_3.png",19.99,0),(4,"Atuel","Traverse a surrealist landscape inspired by the Atuel River in Argentina.","","","https://xiaonenglife.oss-cn-hangzhou.aliyuncs.com/static/pic/2022/11/20221102193135_5.png",0,0),(201,"Family","Tim Sheinman","Puzzle","TEST","https://xiaonenglife.oss-cn-hangzhou.aliyuncs.com/static/pic/2022/11/20221123235723_201.png",2.99,0),(202,"Rivals","dreamfeel","Puzzle","TEST","https://xiaonenglife.oss-cn-hangzhou.aliyuncs.com/static/pic/2022/11/20221123235723_202.png",5.99,0),(203,"Conspiracy!","Tim Sheinman","Puzzle","TEST","https://xiaonenglife.oss-cn-hangzhou.aliyuncs.com/static/pic/2022/11/20221123235723_203.png",4.99,0),(204,"Riley & Rochelle","Nolski","Puzzle","TEST","https://xiaonenglife.oss-cn-hangzhou.aliyuncs.com/static/pic/2022/11/20221123235723_204.png",14.99,0);select * from game;insert into tag values(1,"Difficult"),(2,"Fast-Paced");insert into gametag values(3,1),(3,2),(4,1);DELIMITER $$CREATE PROCEDURE gamelist()BEGIN# TODOEND $$DELIMITER ;select a.title,a.text,img,price,web,if(group_concat(c.title separator "#") is null ,"", group_concat(c.title separator "#")) as tag from game a left join gametag b on a.id = b.gameid left join tag c on b.tagid = c.id group by a.id;drop table if exists users;drop table if exists comments;create table users(id int primary key auto_increment,uid varchar(255),name varchar(255),password varchar(255));create table comments(id int primary key auto_increment,uid int,text mediumtext,pid int,date long);insert into users(uid,name,password) values("1001","admin","123456"),("1002","玉米炖萝卜","123456"),("1003","西红柿炒番茄","123456");INSERT INTO comments(id, uid, text, pid, date) VALUES (1, 1003, 'asdmoapsdasopdnopasdopasopdas localstorage', 100, 1666107328334);INSERT INTO comments(id, uid, text, pid, date) VALUES (2, 1003, 'asdmoapsdasopdnopasdopasopdas localstorage', 100, 1666107328836);INSERT INTO comments(id, uid, text, pid, date)  VALUES (3, 1003, 'asdmoapsdasopdnopasdopasopdas localstorage', 100, 1666107329459);INSERT INTO comments(id, uid, text, pid, date)  VALUES (4, 1001, 'asdmoapsdasopdnopasdopasopdas localstorage', 100, 1666107331864);INSERT INTO comments(id, uid, text, pid, date)  VALUES (5, 1001, 'asdmoapsdasopdnopasdopasopdas localstorage', 100, 1666107332720);INSERT INTO comments(id, uid, text, pid, date)  VALUES (6, 1002, '你好', 100, 1666107337646);select * from users;select * from comments;select * from game;drop table if exists posts;create table posts(id int primary key auto_increment,bgcolor varchar(7),textcolor varchar(7),headimg varchar(255),videosrc varchar(255),imgs mediumtext,html mediumtext);insert into posts(id,bgcolor,textcolor,headimg,videosrc,imgs,html) values(100,"#E8E1BC","#2f5b71","https://xiaonenglife.oss-cn-hangzhou.aliyuncs.com/static/pic/2022/11/20221109232741_head.png","https://www.youtube.com/embed/zGGTLStyKX0",'["https://xiaonenglife.oss-cn-hangzhou.aliyuncs.com/static/pic/2022/11/20221109233251_1.png","https://xiaonenglife.oss-cn-hangzhou.aliyuncs.com/static/pic/2022/11/20221109233256_4.png","https://xiaonenglife.oss-cn-hangzhou.aliyuncs.com/static/pic/2022/11/20221109233253_2.png","https://xiaonenglife.oss-cn-hangzhou.aliyuncs.com/static/pic/2022/11/20221109233255_3.png","https://xiaonenglife.oss-cn-hangzhou.aliyuncs.com/static/pic/2022/11/20221109233258_5.png"]','      A sound reverberated from beyond the ocean.              At the edge of a desolate island, pick up what the waves wash ashore to      make instruments. Use those instruments to answer the echoes heard from      beyond the ocean. In this hand-drawn world, enjoy a soothing soundscape      formed by waves, footsteps and the sounds made from things washed up.                  Resonance of the Ocean is a short adventure game you can play in 10 ~      30min. This game was made in the 22nd unity1week, a Japanese game jam      event. This version is updated with an English localization and with small      changes. In unity1week, this game placed 4th in the overall ranking, and      1st for art and sound.        Controls          This game only supports keyboard controls.              Arrow Keys: Move
        Space Key（Or ZXC）: Confirm
        ZXC Keys: pick up, replace, throw, search
      
        Save Function          There is no save function available as the time required to complete the      game is short (10 ~ 30 min). Thank you for your understanding.    '),(101,"#FFFFFF","#000000","https://xiaonenglife.oss-cn-hangzhou.aliyuncs.com/static/pic/2022/11/20221110004301_head2.png","https://www.youtube.com/embed/vddlEmrbNRw",'["https://xiaonenglife.oss-cn-hangzhou.aliyuncs.com/static/pic/2022/11/20221110004259_7.png","https://xiaonenglife.oss-cn-hangzhou.aliyuncs.com/static/pic/2022/11/20221110004259_8.png","https://xiaonenglife.oss-cn-hangzhou.aliyuncs.com/static/pic/2022/11/20221110004259_9.png","https://xiaonenglife.oss-cn-hangzhou.aliyuncs.com/static/pic/2022/11/20221110004259_10.png"]','      The past and future cannot be explored alone! Team up with a friend and      piece together the mysteries surrounding Albert Vanderboom. Communicate      what you see around you to help one another solve various puzzles and      explore the worlds from different perspectives!              The Past Within is the first co-op only      point-and-click adventure set in the mysterious world of Rusty Lake.        Features                  A co-op experience
        Play together with a friend, one in The Past, the other in The Future.        Work together to solve the puzzles and help Rose set her father’s plan        in motion!        Two worlds - Two perspectives
        Both players will experience their environments in two different        dimensions: 2D as well as in 3D - a first-time experience in the Rusty        Lake universe!        Cross-platform play
        As long as you can communicate with each other, you and your partner of        choice can each play The Past Within on your preferred platform: PC,        Mac, iOS, Android and (very soon) Nintendo Switch!        Playtime & Replayability
        The game contains 2 chapters and has an average play-time of 2 hours.        For the full experience, we recommend replaying the game from the other        perspective. Plus you can use our replayability feature for a fresh        start with new solutions to all puzzles.      
        '),(201,"#FFFFFF","#000000","https://xiaonenglife.oss-cn-hangzhou.aliyuncs.com/static/pic/2022/11/20221123235723_201.png","https://www.youtube.com/embed/vddlEmrbNRw",'["https://xiaonenglife.oss-cn-hangzhou.aliyuncs.com/static/pic/2022/11/20221110004259_7.png","https://xiaonenglife.oss-cn-hangzhou.aliyuncs.com/static/pic/2022/11/20221110004259_8.png","https://xiaonenglife.oss-cn-hangzhou.aliyuncs.com/static/pic/2022/11/20221110004259_9.png","https://xiaonenglife.oss-cn-hangzhou.aliyuncs.com/static/pic/2022/11/20221110004259_10.png"]','测试测试测试        '),(202,"#FFFFFF","#000000","https://xiaonenglife.oss-cn-hangzhou.aliyuncs.com/static/pic/2022/11/20221123235723_202.png","https://www.youtube.com/embed/vddlEmrbNRw",'["https://xiaonenglife.oss-cn-hangzhou.aliyuncs.com/static/pic/2022/11/20221110004259_7.png","https://xiaonenglife.oss-cn-hangzhou.aliyuncs.com/static/pic/2022/11/20221110004259_8.png","https://xiaonenglife.oss-cn-hangzhou.aliyuncs.com/static/pic/2022/11/20221110004259_9.png","https://xiaonenglife.oss-cn-hangzhou.aliyuncs.com/static/pic/2022/11/20221110004259_10.png"]','测试测试测试        '),(203,"#FFFFFF","#000000","https://xiaonenglife.oss-cn-hangzhou.aliyuncs.com/static/pic/2022/11/20221123235723_203.png","https://www.youtube.com/embed/vddlEmrbNRw",'["https://xiaonenglife.oss-cn-hangzhou.aliyuncs.com/static/pic/2022/11/20221110004259_7.png","https://xiaonenglife.oss-cn-hangzhou.aliyuncs.com/static/pic/2022/11/20221110004259_8.png","https://xiaonenglife.oss-cn-hangzhou.aliyuncs.com/static/pic/2022/11/20221110004259_9.png","https://xiaonenglife.oss-cn-hangzhou.aliyuncs.com/static/pic/2022/11/20221110004259_10.png"]','测试测试测试        '),(204,"#FFFFFF","#000000","https://xiaonenglife.oss-cn-hangzhou.aliyuncs.com/static/pic/2022/11/20221123235723_204.png","https://www.youtube.com/embed/vddlEmrbNRw",'["https://xiaonenglife.oss-cn-hangzhou.aliyuncs.com/static/pic/2022/11/20221110004259_7.png","https://xiaonenglife.oss-cn-hangzhou.aliyuncs.com/static/pic/2022/11/20221110004259_8.png","https://xiaonenglife.oss-cn-hangzhou.aliyuncs.com/static/pic/2022/11/20221110004259_9.png","https://xiaonenglife.oss-cn-hangzhou.aliyuncs.com/static/pic/2022/11/20221110004259_10.png"]','测试测试测试        ');select * from posts;drop table if exists sellopts;create table sellopts(id int primary key auto_increment,days int,    hours int,    minutes int,    discount int);insert into sellopts(id,days,hours,minutes,discount) values(1,29,8,20,24);select id,bgcolor,textcolor,headimg,videosrc,imgs,html from posts where id = 100

JS 数组方法

JavaScript Array 对象 | 菜鸟教程 (runoob.com)

Gin Query

Gin之获取querystring参数_GoGo在努力的博客-CSDN博客

Gin Session

gin-contrib/sessions: Gin middleware for session management (github.com)

gin-contrib/sessions 筆記 | PJCHENder 未整理筆記

我的Vue之旅 11 Vuex 实现购物车

`最新关注`

`热文推荐`

`爱心商城|爱心商城系统|基于Springboot的爱心商城系统设计与实现(源码+数据库+文档)`

`华为云切换操作系统使用私有镜像安装Windows Server 2022`

`在线会议中人脸面部轮廓图像提取（二）——HOG人脸面部轮廓图像特征提取`

`PoseiSwap 参赛，参与斯坦福、Nautilus Chain等联合主办的 Hackathon 活动`

`java.sql.SQLNonTransientConnectionException: Public Key Retrieval is not allowed`

`深度分析去中心化交易所的优缺点`

我的Vue之旅 11 Vuex 实现购物车

相关文章

最新关注

热文推荐

`相关文章`

`最新关注`

`热文推荐`