《仿盒马》app开发技术分享-- 新人专享券（2）
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
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
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