## 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