《仿盒马》app开发技术分享-- 新人专享券（2）

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技术栈 Appgallery connect

开发准备

上一篇文章中我们实现了项目端云一体化的升级，我们的数据后期就要从云侧的数据库去获取了，现在我们从头开始对项目进行端云一体化的改造。我们在首页已经把新人专享券抽离为公共组件

现在我们继续进行功能开发，把这个组建的本地数据展示修改为端侧获取。

功能分析

我们把之前实现的首页功能拿出改造一下。​我们在首页实现了新用户领券中心，数据结构就是 模块的标题、说明、优惠券列表，列表包含优惠券的金额、类型，同时我们还要给券添加一些其他参数，比如领取时间，领取用户等，这时候就又延伸出一个功能，当我们用户没有登录的时候，我们点击立即领取，是需要跳转到用户登录页面的。

因为云数据库不支持外键，所以我们通过多插入id字段来进行数据查询。

代码实现

首先我们进行表的创建。

home_new_people_coupon 这是首页活动模块的表 { "objectTypeName": "home_new_people_coupon", "fields": [ {"fieldName": "activity_id", "fieldType": "Integer", "notNull": true, "belongPrimaryKey": true}, {"fieldName": "title", "fieldType": "String", "notNull": true, "defaultValue": 0}, {"fieldName": "msg", "fieldType": "String"}, {"fieldName": "home_coupon_activity_id", "fieldType": "Integer"}, {"fieldName": "router", "fieldType": "String"}, {"fieldName": "activity_time", "fieldType": "String"} ], "indexes": [ {"indexName": "home_coupon_activity_id_index", "indexList": [{"fieldName":"home_coupon_activity_id","sortType":"ASC"}]} ], "permissions": [ {"role": "World", "rights": ["Read"]}, {"role": "Authenticated", "rights": ["Read", "Upsert"]}, {"role": "Creator", "rights": ["Read", "Upsert", "Delete"]}, {"role": "Administrator", "rights": ["Read", "Upsert", "Delete"]} ] } 然后我们创建对应的活动id下的优惠券列表表

coupon_info { "objectTypeName": "coupon_info", "fields": [ {"fieldName": "coupon_id", "fieldType": "Integer", "notNull": true, "belongPrimaryKey": true}, {"fieldName": "home_coupon_activity_id", "fieldType": "Integer", "notNull": true, "defaultValue": 0}, {"fieldName": "price", "fieldType": "String"}, {"fieldName": "type", "fieldType": "String"}, {"fieldName": "get_time", "fieldType": "String"}, {"fieldName": "limit_amount", "fieldType": "Integer"}, {"fieldName": "txt", "fieldType": "String"}, {"fieldName": "activity_id", "fieldType": "Integer"} ], "indexes": [ {"indexName": "couponIdIndex", "indexList": [{"fieldName":"coupon_id","sortType":"ASC"}]} ], "permissions": [ {"role": "World", "rights": ["Read"]}, {"role": "Authenticated", "rights": ["Read", "Upsert"]}, {"role": "Creator", "rights": ["Read", "Upsert", "Delete"]}, {"role": "Administrator", "rights": ["Read", "Upsert", "Delete"]} ] } 完成之后我们插入数据

{ "cloudDBZoneName": "default", "objectTypeName": "home_new_people_coupon", "objects": [ { "activity_id": 10, "title": "新人活动", "msg": "前三单免运费", "home_coupon_activity_id": 10, "router": "路由", "activity_time": "2025-4-3" } ] } { "cloudDBZoneName": "default", "objectTypeName": "coupon_info", "objects": [ { "coupon_id": 10, "home_coupon_activity_id": 10, "price": "10", "type": "新人专享", "get_time": "2025-3-18", "limit_amount": 30, "txt": "string1", "activity_id": 1 }, { "coupon_id": 20, "home_coupon_activity_id": 10, "price": "string2", "type": "string2", "get_time": "string2", "limit_amount": 20, "txt": "string2", "activity_id": 1 }, { "coupon_id": 30, "home_coupon_activity_id": 10, "price": "string1", "type": "string1", "get_time": "string1", "limit_amount": 10, "txt": "string1", "activity_id": 1 }, { "coupon_id": 40, "home_coupon_activity_id": 10, "price": "string2", "type": "string2", "get_time": "string2", "limit_amount": 20, "txt": "string2", "activity_id": 1 } ] } 数据都插入完之后，我们把内容同步到云端数据库，然后client model 、server model 创建对应的类

都执行完之后我们就可以直接在index 页面进行数据的查询了

首先创建接收数据的对象

@State home_new_people_coupon:homeNewPeopleCoupon|null=null @State couponList:couponInfo[]=[] 然后进行查询

let databaseZone = cloudDatabase.zone('default'); let condition = new cloudDatabase.DatabaseQuery(home_new_people_coupon); let condition1 = new cloudDatabase.DatabaseQuery(coupon_info); let listData = await databaseZone.query(condition); let json = JSON.stringify(listData) let data:homeNewPeopleCoupon= JSON.parse(json) this.home_new_people_coupon=data; let listData1 = await databaseZone.query(condition1); condition1.equalTo("home_coupon_activity_id",data.home_coupon_activity_id)

let json1 = JSON.stringify(listData1) let data1:couponInfo[]= JSON.parse(json1) this.couponList=data1 可以看到我们的云端数据已经查出来了

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我们把数据修改一下提交到云端

{ "cloudDBZoneName": "default", "objectTypeName": "coupon_info", "objects": [ { "coupon_id": 10, "home_coupon_activity_id": 10, "price": "10", "type": "新人专享", "get_time": "2025-3-18", "limit_amount": 30, "txt": "string1", "activity_id": 1 }, { "coupon_id": 20, "home_coupon_activity_id": 10, "price": "15", "type": "新人专享", "get_time": "string2", "limit_amount": 20, "txt": "string2", "activity_id": 1 }, { "coupon_id": 30, "home_coupon_activity_id": 10, "price": "20", "type": "新人专享", "get_time": "string1", "limit_amount": 10, "txt": "string1", "activity_id": 1 }, { "coupon_id": 40, "home_coupon_activity_id": 10, "price": "30", "type": "新人专享", "get_time": "string2", "limit_amount": 20, "txt": "string2", "activity_id": 1 } ] } 然后修改我们之间创建的新人活动的组件

import { couponInfo } from "../entity/couponInfo" import { homeNewPeopleCoupon } from "../entity/homeNewPeopleCoupon"

@Component @Preview export struct CouponComponent { @Link home_activity:homeNewPeopleCoupon|null @Link couponList:couponInfo[]

build() { Column() { Row() { Text(this.home_activity?.title) .fontSize(20) .fontColor('#FF0000')

    Text(this.home_activity?.msg)
      .fontSize(14)
      .fontColor('#888888')
      .margin({left:10})
  }
  .width('100%')
  .padding(16)

  List({ space: 10 }) {
    ForEach(this.couponList, (item:couponInfo) => {
      ListItem() {
        Column() {
          Text(item.price)
            .fontSize(22)
            .fontColor('#FF4444')
            .margin({ bottom: 8 })

          Text(item.type)
            .fontSize(12)
            .fontColor('#FF4444')
        }
        .padding(10)
        .backgroundColor("#ffffff")
        .borderRadius(8)
      }
    })
  }
  .margin({left:50})
  .listDirection(Axis.Horizontal)
  .width('100%')
  .height(80)

  Button('立即领取', { type: ButtonType.Normal })
    .width(240)
    .height(40)
    .backgroundColor('#FF0000')
    .fontColor(Color.White)
    .borderRadius(20)
    .margin({ bottom: 16 })
    .onClick(()=>{
      console.log(`"router"`)
    })
}
.backgroundColor("#fffce2be")
.width('95%')
.margin({top:20})
.borderRadius(20)

} } 首页调用组件进行参数的传入

CouponComponent({home_activity:this.home_new_people_coupon,couponList:this.couponList}) 到这里我们的新人活动就完成了 ​