技术栈
Appgallery connect
开发准备
上一节我们实现了个人信息页面的信息展示和页面修改，并且实现了数据的同步修改，这一节我们来实现电商应用里比较重要的模块，地址模块。首先我们来实现地址的展示。
功能分析
地址列表的展示相对来说是比较简单的，首先我们要新增对应的表，然后在云端先添加几条测试数据，然后在页面中实现当前用户对应的地址查询，在列表组件中进行展示
代码实现
首先我们创建对应的表
{
"objectTypeName": "address_list",
"fields": [
{"fieldName": "id", "fieldType": "Integer", "notNull": true, "belongPrimaryKey": true},
{"fieldName": "user_id", "fieldType": "Integer", "notNull": true, "defaultValue": 0},
{"fieldName": "administrativeArea", "fieldType": "String"},
{"fieldName": "locality", "fieldType": "String"},
{"fieldName": "subLocality", "fieldType": "String"},
{"fieldName": "placeName", "fieldType": "String"},
{"fieldName": "latitude", "fieldType": "String"},
{"fieldName": "longitude", "fieldType": "String"},
{"fieldName": "nikeName", "fieldType": "String"},
{"fieldName": "phone", "fieldType": "String"},
{"fieldName": "address", "fieldType": "String"}
],
"indexes": [
{"indexName": "field1IndexId", "indexList": [{"fieldName":"id","sortType":"ASC"}]}
],
"permissions": [
{"role": "World", "rights": ["Read", "Upsert", "Delete"]},
{"role": "Authenticated", "rights": ["Read", "Upsert", "Delete"]},
{"role": "Creator", "rights": ["Read", "Upsert", "Delete"]},
{"role": "Administrator", "rights": ["Read", "Upsert", "Delete"]}
]
}
然后我们生成对应的实体类，和db类
db
import { cloudDatabase } from '@kit.CloudFoundationKit';
class address_list extends cloudDatabase.DatabaseObject {
public id: number;
public user_id = 0;
public administrativeArea: string;
public locality: string;
public subLocality: string;
public placeName: string;
public latitude: string;
public longitude: string;
public nikeName: string;
public phone: string;
public address: string;
public naturalbase_ClassName(): string {
return 'address_list';
}
}
export { address_list };
实体类
class AddressList {
id: number;
user_id: number = 0;
administrativeArea: string;
locality: string;
subLocality: string;
placeName: string;
latitude: string;
longitude: string;
nikeName: string;
phone: string;
address: string;
constructor() { } setId(id: number): void { this.id = id; } getId(): number { return this.id; } setUser_id(user_id: number): void { this.user_id = user_id; } getUser_id(): number { return this.user_id; } setAdministrativeArea(administrativeArea: string): void { this.administrativeArea = administrativeArea; } getAdministrativeArea(): string { return this.administrativeArea; } setLocality(locality: string): void { this.locality = locality; } getLocality(): string { return this.locality; } setSubLocality(subLocality: string): void { this.subLocality = subLocality; } getSubLocality(): string { return this.subLocality; } setPlaceName(placeName: string): void { this.placeName = placeName; } getPlaceName(): string { return this.placeName; } setLatitude(latitude: string): void { this.latitude = latitude; } getLatitude(): string { return this.latitude; } setLongitude(longitude: string): void { this.longitude = longitude; } getLongitude(): string { return this.longitude; } setNikeName(nikeName: string): void { this.nikeName = nikeName; } getNikeName(): string { return this.nikeName; } setPhone(phone: string): void { this.phone = phone; } getPhone(): string { return this.phone; } setAddress(address: string): void { this.address = address; } getAddress(): string { return this.address; } static parseFrom(inputObject: any): AddressList { let result = new AddressList(); if (!inputObject) { return result; } if (inputObject.id) { result.id = inputObject.id; } if (inputObject.user_id) { result.user_id = inputObject.user_id; } if (inputObject.administrativeArea) { result.administrativeArea = inputObject.administrativeArea; } if (inputObject.locality) { result.locality = inputObject.locality; } if (inputObject.subLocality) { result.subLocality = inputObject.subLocality; } if (inputObject.placeName) { result.placeName = inputObject.placeName; } if (inputObject.latitude) { result.latitude = inputObject.latitude; } if (inputObject.longitude) { result.longitude = inputObject.longitude; } if (inputObject.nikeName) { result.nikeName = inputObject.nikeName; } if (inputObject.phone) { result.phone = inputObject.phone; } if (inputObject.address) { result.address = inputObject.address; } return result; } }
export { AddressList };
都创建完成之后，接下来我们就可以创建对应的页面开始查询我们云数据库的数据了
@Entry
@Component
struct AddressListPage {
@State user: User|null=null;
@State addressList:AddressList[]=[]
async aboutToAppear(): Promise {
const value = await StorageUtils.getAll('user');
this.user=JSON.parse(value)
let databaseZone = cloudDatabase.zone('default');
let condition = new cloudDatabase.DatabaseQuery(address_list);
condition.equalTo("user_id",this.user!.user_id)
let listData = await databaseZone.query(condition);
let json = JSON.stringify(listData)
let data1:AddressList[]= JSON.parse(json)
this.addressList=data1
hilog.info(0x0000, 'testTag', Succeeded in querying data, result: ${data1});
}
}
我们先添加对应的用户信息参数和对应的列表数据接收参数，然后在生命周期内进行数据查询
然后把数据展示到列表中
build() {
Column() {
CommonTopBar({ title: "地址列表", alpha: 0, titleAlignment: TextAlign.Center ,backButton:true})
Stack({alignContent:Alignment.Bottom}){
Column(){
List(){
ForEach(this.addressList,(item:AddressList,index:number)=>{
ListItem(){
Column(){
Row(){
Column({space:10}){
Row(){
Text(item.nikeName)
.fontColor(Color.Black)
.fontSize(16)
.fontWeight(FontWeight.Bold)
Text(item.phone)
.fontColor(Color.Black)
.fontSize(16)
.fontWeight(FontWeight.Bold)
.margin({left:20})
}
Text(item.address)
.fontColor(Color.Black)
.fontSize(16)
}
.alignItems(HorizontalAlign.Start)
.justifyContent(FlexAlign.Center)
Image($r('app.media.address_edit')) .width(20) .height(20) .onClick(()=>{ showToast("编辑") }) } .justifyContent(FlexAlign.SpaceBetween) .width('100%') .padding(10) Divider().width('90%').height(0.8) .color("#ffb1b0b0") } } }) } .layoutWeight(1) } .height('90%') Text("新增地址") .width('70%') .height(45) .fontWeight(FontWeight.Bold) .fontColor(Color.White) .backgroundColor(0xff0000) .borderRadius(10) .textAlign(TextAlign.Center) } .backgroundColor(Color.White) } .backgroundColor(Color.White) .height('100%') .width('100%') }
到这里我们的地址展示就实现了