Error: Can't resolve all parameters for Storage: (?, ?). ionic - ionic-framework

I have had this error "NullInjectorError: No provider for Storage!" and then I add Storage in app.module.ts
then I had another error : Error: Can't resolve all parameters for Storage: (?, ?)
and sometime i had this error :
Uncaught TypeError: Cannot read property 'id' of undefined
core.js:24134 Uncaught TypeError: Cannot read property 'id' of undefined
at registerNgModuleType (core.js:24134)
at core.js:24145
at Array.forEach (<anonymous>)
at registerNgModuleType (core.js:24145)
at new NgModuleFactory$1 (core.js:24242)
at compileNgModuleFactory__POST_R3__ (core.js:27786)
at PlatformRef.bootstrapModule (core.js:28024)
at Module../src/main.ts (main.ts:11)
at __webpack_require__ (bootstrap:84)
at Object.0 (main.ts:12
I tried importing IonicStorageModule and it is the same
app.moudle.page.ts file :
import { Component, OnInit } from '#angular/core';
import { NavController, NavParams, LoadingController, AlertController, ModalController } from '#ionic/angular';
import { PersonalinfoService } from 'src/app/services/personalinfo.service';
import { AlertService } from 'src/app/services/alert.service';
import { Saudi } from '../../../app/models/saudi';
import { ErrorsService } from '../../../app/services/errors.service';
#Component({
selector: 'app-personalinfo',
templateUrl: './personalinfo.page.html',
styleUrls: ['./personalinfo.page.scss'],
})
export class PersonalinfoPage{
public personal_info : any;
private loading : any;
constructor(public navCtrl: NavController,
public navParams: NavParams,
private personalinfoService : PersonalinfoService,
private errorsService : ErrorsService,
public modalCtrl: ModalController,
private loadingCtrl : LoadingController,
private alertCtrl : AlertController,
public storage: Storage,
) {
this.personal_info = this.navParams.get('personal_info') || new Saudi();
// هذذا حلو بس ماضبط
// this.loading = this.loadingCtrl.create({
// content: 'Please wait...',
// spinner: 'bubbles'
// });
}
ionViewDidLoad() {
console.log('ionViewDidLoad addInfoPage');
}
addInfo() {
let data = {
personal_info: this.personal_info
}
this.personalinfoService.store( JSON.stringify( data ) ).subscribe(
personal_info => {
this.personal_info = personal_info;
this.loading.dismiss();
this.dismiss( true );
},
);
}
closeModal(){
this.dismiss(false);
}
dismiss( returnParam : boolean ) {
let data = { 'personal_info': this.personal_info, 'returnParam': returnParam };
this.modalCtrl.dismiss( data );
}
}
Register.page.ts file
import { Component, OnInit } from '#angular/core';
import { ModalController, NavController } from '#ionic/angular';
import { LoginPage } from '../login/login.page';
import { AuthService } from 'src/app/services/auth.service';
import { NgForm } from '#angular/forms';
import { AlertService } from 'src/app/services/alert.service';
#Component({
selector: 'app-register',
templateUrl: './register.page.html',
styleUrls: ['./register.page.scss'],
})
export class RegisterPage implements OnInit {
constructor(private modalController: ModalController,
private authService: AuthService,
private navCtrl: NavController,
private alertService: AlertService
) { }
ngOnInit() {
}
dismissRegister() {
this.modalController.dismiss();
}
async loginModal() {
this.dismissRegister();
const loginModal = await this.modalController.create({
component: LoginPage,
});
return await loginModal.present();
}
register(form: NgForm) {
this.authService.register(form.value.name, form.value.email, form.value.password).subscribe(
data => {
this.authService.login(form.value.email, form.value.password).subscribe(
data => {
},
error => {
console.log(error);
},
() => {
this.dismissRegister();
this.navCtrl.navigateRoot('/personalinfo');
}
);
this.alertService.presentToast(data['message']);
},
error => {
console.log(error);
},
() => {
}
);
}
}
before i add personal page everythings works fine.
I have nothing else but there is an id added in the model
update :
I get steps back when it is working and starting again
the thing is it happand again
I have page called Home, Personalinfo
Home is called after success login and called personalinfo page in Home page
I have importing it like this: because I have got this error "No provider for PersonalinfoService!"
home-routing.module.ts
import { NgModule } from '#angular/core';
import { Routes, RouterModule } from '#angular/router';
import { HomePage } from './home.page';
import { PersonalinfoPage } from './../personalinfo/personalinfo.page';
const routes: Routes = [
{
path: '',
component: HomePage
}
];
#NgModule({
imports: [RouterModule.forChild(routes),
PersonalinfoPage
],
exports: [RouterModule],
})
export class HomePageRoutingModule {}
I DID MISS THE
#Injectable({
providedIn: 'root'
})
IN THE SERVICE FILE THATS WHERE CAME ALL THE MISS
THANK YOU

Like it's mentioned in the docs, you need to import IonicStorageModule.forRoot() in the AppModule:
import { IonicStorageModule } from '#ionic/storage';
#NgModule({
declarations: [
// ...
],
imports: [
BrowserModule,
IonicModule.forRoot(MyApp),
IonicStorageModule.forRoot() // <--- here!
],
bootstrap: [IonicApp],
entryComponents: [
// ...
],
providers: [
// ...
]
})
export class AppModule {}
Besides that, in your personalifo.ts file, you're injecting Storage but that's not actually Ionic's storage but the Web Storage API – you can see that when hovering on the Storage class:
In order to inject the right dependency, you'd need to add the following import at the top of the file: import { Storage } from '#ionic/storage'; to make sure you're using Ionic's storage:
import { Storage } from '#ionic/storage'; // <--- here!
// ...
#Component({
selector: 'app-personalinfo',
templateUrl: './personalinfo.page.html',
styleUrls: ['./personalinfo.page.scss'],
})
export class PersonalinfoPage {
constructor(
public storage: Storage,
// ...
) {}
}

Related

Deeplinks with Ionic / Capacitor

I'm trying to retrieve a request param from a deeplink to a Ionic 5 application using Deeplink plugin (authorization code provided by authorization server on successful authorization redirection).
Android intent filter seems correctly configured as the app is opening after successful authentication.
I keep having unmatched deeplinks with plugin_not_installed error.
app.module.ts:
import { HttpClientModule } from '#angular/common/http';
import { APP_INITIALIZER, NgModule } from '#angular/core';
import { BrowserModule } from '#angular/platform-browser';
import { RouteReuseStrategy } from '#angular/router';
import { Deeplinks } from '#ionic-native/deeplinks/ngx';
import { SQLitePorter } from '#ionic-native/sqlite-porter/ngx';
import { SQLite } from '#ionic-native/sqlite/ngx';
import { Vibration } from '#ionic-native/vibration/ngx';
import { IonicModule, IonicRouteStrategy } from '#ionic/angular';
import { IonicStorageModule } from '#ionic/storage';
import { ApiModule as NumeraApiModule } from '#lexi-clients/numera';
import { OidcUaaModule } from '#lexi/oidc-uaa';
import { AuthModule, OidcConfigService } from 'angular-auth-oidc-client';
import { environment } from '../environments/environment';
import { AppRoutingModule } from './app-routing.module';
import { AppComponent } from './app.component';
import { SettingsService } from './settings/settings.service';
export function loadSettings(config: SettingsService) {
return () => config.load();
}
export function configureAuth(oidcConfigService: OidcConfigService) {
return () => oidcConfigService.withConfig(environment.authentication.angularAuthOidcClient);
}
#NgModule({
declarations: [AppComponent],
entryComponents: [],
imports: [
AuthModule.forRoot(),
BrowserModule,
HttpClientModule,
IonicModule.forRoot(),
IonicStorageModule.forRoot(),
NumeraApiModule,
OidcUaaModule,
AppRoutingModule,
],
providers: [
{
provide: APP_INITIALIZER,
useFactory: loadSettings,
deps: [SettingsService],
multi: true,
},
{
provide: APP_INITIALIZER,
useFactory: configureAuth,
deps: [OidcConfigService],
multi: true,
},
{ provide: RouteReuseStrategy, useClass: IonicRouteStrategy },
Deeplinks,
OidcConfigService,
SQLite,
SQLitePorter,
Vibration,
],
bootstrap: [AppComponent],
})
export class AppModule {}
app.component.ts:
import { AfterViewInit, Component, NgZone, OnDestroy, OnInit } from '#angular/core';
import { NavigationEnd, Router } from '#angular/router';
import { App, Plugins, StatusBarStyle } from '#capacitor/core';
import { AppCenterCrashes } from '#ionic-native/app-center-crashes';
import { Deeplinks } from '#ionic-native/deeplinks/ngx';
import { NavController, Platform } from '#ionic/angular';
import { LexiUser, UaaService } from '#lexi/oidc-uaa';
import { Observable, Subscription } from 'rxjs';
import { SettingsPage } from './settings/settings.page';
import { SettingsService } from './settings/settings.service';
#Component({
selector: 'app-root',
templateUrl: 'app.component.html',
styleUrls: ['app.component.scss'],
})
export class AppComponent implements AfterViewInit, OnInit, OnDestroy {
constructor(
private platform: Platform,
private router: Router,
private idService: UaaService,
private settings: SettingsService,
private navController: NavController,
private deeplinks: Deeplinks,
private zone: NgZone
) {
this.platform.ready().then(async () => {
if (this.platform.is('mobile')) {
const { SplashScreen, StatusBar } = Plugins;
StatusBar.setStyle({ style: StatusBarStyle.Light });
SplashScreen.hide();
}
});
}
ngAfterViewInit() {
if (this.platform.is('mobile')) {
this.deeplinks.routeWithNavController(this.navController, { 'login-callback': SettingsPage }).subscribe(
(match) => {
console.log('Successfully matched route', match);
// Create our internal Router path by hand
const internalPath = '/settings';
// Run the navigation in the Angular zone
this.zone.run(() => {
this.router.navigateByUrl(internalPath);
});
},
(nomatch) => {
// nomatch.$link - the full link data
console.error("Got a deeplink that didn't match", nomatch);
}
);
}
}
}
I got it. My Ionic project is a module in an Angular multi-module project and plugin npm dependencies where added to root package.json.
Moving all Ionic-native related dependencies to package.json in Ionic project folder and running ionic cap sync again solved my problem.
Now the question is How to properly configure a Ionic module in an Angular mono-repo (aka multi-module project)?

Nativescript-angular2 Uncaught (in promise): Error: Cannot match any routes with multiple nested routing

I'm developing a mobile app with nativescript + Angular 8. Basically the app download a fat json object from the backend and then with multiple nested routing give the possibility to select a specific action.
The routing chain (each moduel is the child of the previous) is written below:
app-routing.module.ts -> main-routing.module.ts -> asset-routing.module.ts -> future-state.routing.module.ts
in the main.component.html is rendered a list of selectable assets generated dynamically from the json downloaded. When an asset is clicked a new list of selectable future-state generated dynamically from the json for the specific asset is shown. When a future-state is selected a list of selectable activities generated dynamically from the json for the specific future-state is shown. At the end the user can select the activity and the data is sent back to the backend.
In the selection phase everything is ok until the future-state item selection. When I try to select a future-state the code return me the Error: Uncaught (in promise): Error: Cannot match any routes. URL Segment: ....
future-state.commponent.ts
import { Component, OnInit } from '#angular/core';
import { ActivatedRoute } from "#angular/router";
import { RouterExtensions } from "nativescript-angular/router";
import { GlobalVariablesService } from '../../../_services/global-variables.service';
import { AndonPossibleIssueOpenStateDto } from '../../../_models/andon-possible-issue-open-state-dto';
#Component({
selector: 'ns-future-state',
templateUrl: './future-state.component.html',
styleUrls: ['./future-state.component.css']
})
export class FutureStateComponent implements OnInit {
id: number;
andonPossibleIssueOpenStateDto: AndonPossibleIssueOpenStateDto;
constructor(
private globalVariables: GlobalVariablesService,
private _route: ActivatedRoute,
private _routerExtensions: RouterExtensions
) { }
ngOnInit(): void {
const idFutureState = +this._route.snapshot.params.id;
this._route.params.subscribe(params => { this.id = params['id']; });
//this.andonPossibleIssueOpenStateDto=this.globalVariables.getAndonBotAssetPossibleStateIssueDto().find(function(element){return element.asset.id==idAsset}) as AndonPossibleIssueOpenStateDto;
}
onBackTap(): void {
this._routerExtensions.back();
}
}
future-state.module.ts
import { NgModule, NO_ERRORS_SCHEMA } from "#angular/core";
import { NativeScriptCommonModule } from "nativescript-angular/common";
import { FutureStateRoutingModule } from "./future-state-routing.module";
import { FutureStateComponent } from "./future-state.component";
import { ActivityComponent } from "./activity/activity.component";
#NgModule({
imports: [
NativeScriptCommonModule,
FutureStateRoutingModule
],
declarations: [
FutureStateComponent,
ActivityComponent
],
exports: [FutureStateComponent],
schemas: [
NO_ERRORS_SCHEMA
]
})
export class FutureStateModule { }
future-state-routing.module.ts
import { NgModule } from "#angular/core";
import { Routes } from "#angular/router";
import { NativeScriptRouterModule } from "nativescript-angular/router";
import { FutureStateComponent } from "./future-state.component";
import { ActivityComponent } from "./activity/activity.component";
const routes: Routes = [
{
path: "",
component: FutureStateComponent
},
{
path: "activity/:id",
component: ActivityComponent
}
];
#NgModule({
imports: [NativeScriptRouterModule.forChild(routes)],
exports: [NativeScriptRouterModule]
})
export class FutureStateRoutingModule { }
asset.component.ts
import { Component, OnInit } from '#angular/core';
import { ActivatedRoute } from "#angular/router";
import { RouterExtensions } from "nativescript-angular/router";
import { GlobalVariablesService } from '../../_services/global-variables.service';
import { AndonBotAssetPossibleStateIssueDto } from '../../_models/andon-bot-asset-possible-state-issue-dto';
#Component({
selector: 'ns-asset',
templateUrl: './asset.component.html',
styleUrls: ['./asset.component.css']
})
export class AssetComponent implements OnInit {
id: number;
andonBotAssetPossibleStateIssueDto: AndonBotAssetPossibleStateIssueDto;
constructor(
private globalVariables: GlobalVariablesService,
private _route: ActivatedRoute,
private _routerExtensions: RouterExtensions
) { }
ngOnInit(): void {
const idAsset = +this._route.snapshot.params.id;
this.id = this._route.snapshot.params['id'];
console.log(this._route.snapshot.children);
console.log(this._route.snapshot.routeConfig);
this.andonBotAssetPossibleStateIssueDto=this.globalVariables.getAndonBotAssetPossibleStateIssueDto().find(function(element){return element.asset.id==idAsset}) as AndonBotAssetPossibleStateIssueDto;
console.log(this.andonBotAssetPossibleStateIssueDto.asset);
console.log(this._route.firstChild);
}
onBackTap(): void {
this._routerExtensions.back();
}
}
asset.coponent.html
<ActionBar class="action-bar">
<Label class="action-bar-title" [text]="andonBotAssetPossibleStateIssueDto.asset.name"></Label>
</ActionBar>
<StackLayout class="page page-content">
<ListView [items]="andonBotAssetPossibleStateIssueDto.possibleStateIssueDto.optionStateIssue" class="list-group">
<ng-template let-item="item">
<Label [nsRouterLink]="['./futureState', item.futureState.id]" [text]="item.futureState.name" class="list-group-item"></Label>
</ng-template>
</ListView>
</StackLayout>
asset.module.ts
import { NgModule, NO_ERRORS_SCHEMA } from "#angular/core";
import { NativeScriptCommonModule } from "nativescript-angular/common";
import { AssetRoutingModule } from "./asset-routing.module";
import { AssetComponent } from "./asset.component";
import { FutureStateModule } from "./future-state/future-state.module";
#NgModule({
imports: [
NativeScriptCommonModule,
AssetRoutingModule,
FutureStateModule
],
declarations: [
AssetComponent
],
exports: [AssetComponent],
schemas: [
NO_ERRORS_SCHEMA
]
})
export class AssetModule { }
asset-routing.module.ts
import { NgModule } from "#angular/core";
import { Routes } from "#angular/router";
import { NativeScriptRouterModule } from "nativescript-angular/router";
import { NSEmptyOutletComponent } from "nativescript-angular";
import { AssetComponent } from "./asset.component";
import { FutureStateComponent } from "./future-state/future-state.component";
const routes: Routes = [
{
path: "",
component: AssetComponent
},
{
path: "futureState/:id",
component: FutureStateComponent
},
{
path: "futureState",
component: NSEmptyOutletComponent,
loadChildren: () => import("~/app/main/asset/future-state/future-state.module").then((m) => m.FutureStateModule)
}
];
#NgModule({
imports: [NativeScriptRouterModule.forChild(routes)],
exports: [NativeScriptRouterModule]
})
export class AssetRoutingModule { }
Below the error message:
Error: Uncaught (in promise): Error: Cannot match any routes. URL Segment: 'main/asset/698/futureState/6'
JS: Error: Cannot match any routes. URL Segment: 'main/asset/698/futureState/6'
JS:
at ApplyRedirects.push.../node_modules/#angular/router/fesm5/router.js.ApplyRedirects.noMatchError (file:///node_modules#angular\router\fesm5\router.js:2459:0) [angular]
JS: at CatchSubscriber.selector (file:///node_modules#angular\router\fesm5\router.js:2440:0) [angular]
JS: at CatchSubscriber.push.../node_modules/rxjs/_esm5/internal/operators/catchError.js.CatchSubscriber.error (file:///node_modules\rxjs_esm5\internal\operators\catchError.js:34:0) [angular]
JS: at MapSubscriber.push.../node_modules/rxjs/_esm5/internal/Subscriber.js.Subscriber._error (file:///node_modules\rxjs_esm5\internal\Subscriber.js:79:0) [angular]
JS: at MapSubscriber.push.../node_modules/rxjs/_esm5/internal/Subscriber.js.Subscriber.error (file:///data/data/org.nativescript.AndonMobile/fil...
The issue was that in the asset.component.html the link requested was /main/asset/[idAsset]/futureState/[idFutureState] instead the router dynamically generated in asset-routing.module.ts was something like /main/asset/futureState/[idFutureState].
I've modified the part:
{
path: "futureState/:id",
component: FutureStateComponent
}
with:
{
path: ":this.id/futureState/:id",
component: FutureStateComponent
}

Ionic 4 native storage - Error storing item Object code: 5, source: "Native", exception: null, stack:

I have this ionic 4 project (Using REST API) and have also install ionic native storage. I might have multiple questions concerning this project, but the first is:
I want to store login data so I can be able to pass a token to the header to be used for other endpoints. But if I run the app and try to login, I get the following error:
Error storing item
Object { code: 5, source: "Native", exception: null, stack: "" }
My auth ts is where my login function is:
import { Injectable } from '#angular/core';
import { HttpClient, HttpHeaders } from '#angular/common/http';
import { tap } from 'rxjs/operators';
import { ApiService } from './api.service';
import { User } from '../models/user';
import { NativeStorage } from '#ionic-native/native-storage/ngx';
#Injectable({
providedIn: 'root'
})
export class AuthService {
isLoggedIn = false;
token: any;
constructor(
private http: HttpClient,
private api: ApiService,
private storage: NativeStorage
) { }
login(account_number: Number, password: String) {
return this.http.post(this.api.API_URL + '/login',
{account_number: account_number, password: password}
).pipe(
tap(token => {
this.storage.setItem('token', token)
.then(
() => {
console.log('Token Stored', token);
},
error => console.error('Error storing item', error)
);
this.token = token;
this.isLoggedIn = true;
return token;
}),
);
}
register(name: String, email: String, phone: Number, reference: String, account_number: String, password: String) {
return this.http.post(this.api.API_URL + '/register',
{ name: name, email: email, phone: phone, reference: reference, account_number: account_number, password: password }
)
}
logout() {
const headers = new HttpHeaders({
'Authorization': "auth-token" + this.token
});
return this.http.get(this.api.API_URL + '/logout', { headers: headers })
.pipe(
tap(data => {
this.storage.remove("token");
this.isLoggedIn = false;
delete this.token;
return data;
})
)
}
getToken() {
return this.storage.getItem('token').then(
data => {
this.token = data;
if (this.token != null) {
this.isLoggedIn = true;
} else {
this.isLoggedIn = false;
}
},
error => {
this.token = null;
this.isLoggedIn = false;
}
);
}
}
And here is is my login.ts.
import { Component, OnInit } from '#angular/core';
import { ModalController, NavController } from '#ionic/angular';
import { AuthService } from 'src/app/services/auth.service';
import { AlertService } from 'src/app/services/alert.service';
import { RegisterPage } from '../register/register.page';
import { NgForm } from '#angular/forms';
import { Router } from '#angular/router';
#Component({
selector: 'app-login',
templateUrl: './login.page.html',
styleUrls: ['./login.page.scss'],
})
export class LoginPage implements OnInit {
userdata: any;
constructor(
private modalC: ModalController,
private authService: AuthService,
private navCtrl: NavController,
private alertService: AlertService,
// private router: Router
) { }
ngOnInit() {
}
// Dismiss Login Modal
dismissLogin() {
this.modalC.dismiss();
}
// On Register button tap, dismiss login modal and open register modal
async registerModal() {
this.dismissLogin();
const registerModal = await this.modalC.create({
component: RegisterPage
});
return await registerModal.present();
}
login(form: NgForm) {
this.authService.login(form.value.account_number, form.value.password).subscribe(
data => {
this.userdata = data;
this.alertService.presentToast("Logged In");
console.log('this is loggin in userdata', data, "and this is the stored auth-token", this.userdata.message);
},
error => {
console.log(error, "logged in");
},
() => {
this.dismissLogin();
this.navCtrl.navigateRoot('/dashboard');
console.log('this is this.userdata', )
}
);
}
}
Here is aslo my app.module.ts
import { NgModule, ErrorHandler } from '#angular/core';
import { BrowserModule } from '#angular/platform-browser';
import { RouteReuseStrategy } from '#angular/router';
import { IonicModule, IonicRouteStrategy, } from '#ionic/angular';
import { SplashScreen } from '#ionic-native/splash-screen/ngx';
import { StatusBar } from '#ionic-native/status-bar/ngx';
import { AppComponent } from './app.component';
import { AppRoutingModule } from './app-routing.module';
import { HttpClientModule } from '#angular/common/http';
import { NativeStorage } from '#ionic-native/native-storage/ngx';
#NgModule({
declarations: [
AppComponent,],
entryComponents: [
],
imports: [
BrowserModule,
IonicModule.forRoot(),
AppRoutingModule,
HttpClientModule
],
providers: [
StatusBar,
SplashScreen,
NativeStorage,
{ provide: RouteReuseStrategy, useClass: IonicRouteStrategy }
],
bootstrap: [AppComponent]
})
export class AppModule {}
You can simply use javascript local storage and also use Ionic native storge for your purpose.
Mostly is used localStorage.set(). In case just want to store strings.
u also use Ionic native storage for the object and many things.
https://ionicframework.com/docs/native/native-storage

Ionic 4 storage problem : No provider for Storage

I try to import storage mdule in my ionic project. but when i add providers Storage, The erro is changed. The error become 'can't resolved storege all : (?)'
How can i solve this error? can you help me please?
I wrote my codes below.
I watch this video :https://www.youtube.com/watch?v=h_IhS8QQjUA&list=PLNFwX8PVq5q7S-p_7zO99xdauhDsnMPw0&index=17&t=0s
App Module ts:
import { NgModule } from '#angular/core';
import { BrowserModule } from '#angular/platform-browser';
import { RouteReuseStrategy } from '#angular/router';
import { IonicModule, IonicRouteStrategy } from '#ionic/angular';
import { SplashScreen } from '#ionic-native/splash-screen/ngx';
import { StatusBar } from '#ionic-native/status-bar/ngx';
import {Storage} from '#ionic/storage';
import { AppComponent } from './app.component';
import { AppRoutingModule } from './app-routing.module';
import { IonicStorageModule } from '#ionic/storage';
#NgModule({
declarations: [AppComponent],
entryComponents: [],
imports: [BrowserModule, IonicModule.forRoot(), AppRoutingModule,IonicStorageModule.forRoot()],
providers: [
StatusBar,
SplashScreen,
{ provide: RouteReuseStrategy, useClass: IonicRouteStrategy }
],
bootstrap: [AppComponent]
})
export class AppModule {}
Page TS
import { Component, ViewChild } from "#angular/core";
import { StorageService, Item } from "../services/storage.service";
import { Platform, ToastController, IonList } from "#ionic/angular";
#Component({
selector: "app-home",
templateUrl: "home.page.html",
styleUrls: ["home.page.scss"]
})
export class HomePage {
items: Item[] = [];
newItem: Item = <Item>{};
#ViewChild("mylist") mylist: IonList;
constructor(
private storageService: StorageService,
private plt: Platform,
private toastController: ToastController
) {
this.plt.ready().then(() => {
this.loadItems();
});
}
loadItems() {
this.storageService.getItems().then(items => {
this.items = items;
});
}
addItem() {
this.newItem.modified = Date.now();
this.newItem.id = Date.now();
this.storageService.addItem(this.newItem).then(item => {
this.newItem = <Item>{};
this.showToast("Item Added");
this.loadItems();
});
}
updateItem(item:Item){
item.title='UPDATED:${item.title}';
item.modified=Date.now();
this.storageService.updateItem(item).then(item=>{
this.showToast("Item Updated");
this.loadItems();
});
}
deleteItem(item:Item){
this.storageService.deleteItem(item.id).then(item=>{
this.showToast("Item Deleted");
this.mylist.closeSlidingItems();
this.loadItems();
});
}
async showToast(msg){
const toast=await this.toastController.create({
message:msg,
duration:2000
});
toast.present();
}
}
Service
import { Injectable } from '#angular/core';
export interface Item{
id:number,
title:string,
value:string,
modified:number
}
const ITEMS_KEY="my-items";
#Injectable({
providedIn: 'root'
})
export class StorageService {
constructor(private storage:Storage) { }
addItem(item:Item):Promise<any>{
return this.storage.get(ITEMS_KEY).then((items:Item[])=>{
if(items){
items.push(item);
return this.storage.set(ITEMS_KEY,items);
}else{
return this.storage.set(ITEMS_KEY,[item]);
}
});
}
getItems():Promise<Item[]>{
return this.storage.get(ITEMS_KEY);
}
getItem(id:number){
}
updateItem(item:Item):Promise<any>{
return this.storage.get(ITEMS_KEY).then((items:Item[])=>{
if(!items || items.length==0){
return null;
}
let newItems:Item[]=[];
for (let i of items){
if(i.id==item.id){
newItems.push(item);
}else{
newItems.push(i);
}
}
return this.storage.set(ITEMS_KEY,newItems);
});
}
deleteItem(id:number):Promise<Item>{
return this.storage.get(ITEMS_KEY).then((items:Item[])=>{
if(!items || items.length==0){
return null;
}
let toKeep:Item[]=[];
for (let i of items){
if(i.id!=id){
toKeep.push(i);
}else{
//newItems.push(i);
}
}
return this.storage.set(ITEMS_KEY,toKeep);
});
}
}
In the StorageService file, you're injecting the storage like this:
constructor(private storage: Storage) { }
but I cannot see the Storage being imported in that file. So the Storage class injected in the constructor refers to the Web Storage API and not to the Ionic's Storage.
To fix that, please import the Storage from #ionic/storage:
import { Storage } from '#ionic/storage';
// ...
#Injectable({
providedIn: 'root'
})
export class StorageService {
constructor(private storage: Storage) { }
// ...
}
installing
npm install #ionic/storage
npm install #ionic/storage-angular
remember create your storage in the service
import { Storage } from '#ionic/storage';
constructor(private storage:Storage){
this.storage.create();
}
and import this in app.module
import { IonicStorageModule } from '#ionic/storage-angular';
import { Storage } from '#ionic/storage';
with storage in your providers
providers: [{ provide: RouteReuseStrategy},Storage],
ionic-storage angular

Import class into ionic 3 and error when instantiating class

I'm new to ionic 3 and I'm trying to register. I have a accounts screen called accounts.ts that gets in src/pages/accounts/accounts.ts and then I'm trying to create a class where DAO will be referring to that class, I created it in the following src/dao/dao-accounts.ts location.
Some errors are showing up
My first doubt is this, do you mind this current?
import {DAOContas} from '../../dao/da-contacts';
I am also wanting to return a list of data but an error appears like this
:
uncaught (im promisse): referrererror: value is not defined
referenceerror: value is not defined at new ContasPage
class dao-accounts.ts
export class DAOContas {
constructor()
{
this.list = [];
}
getList()
{
this.list = [
{descricao:"Alimentação"},
{descricao:"Lazer"},
{descricao:"Transporte"}
];
return this.list;
}
}
method ContasPage.ts
import { Component } from '#angular/core';
import { NavController, NavParams } from 'ionic-angular';
import { DAOContas } from '../../dao/dao-contas';
#Component({
selector: 'page-list',
templateUrl: 'contas.html'
})
export class ContasPage {
constructor(public navCtrl: NavController, public navParams: NavParams) {
this.dao = new DAOContas();
this.listcontas = this.dao.getList();
}
}
Error Occurs When Instantiating DAOContas
So the issue here relates to dependency injection pattern. See official documentation of how that works for more info.
Based on the code you provided it seems like the issue is with the way you organized your code and declared (or did not declare) certain variables.
In your ContasPage do ensure you:
import the class
declare the vars
do assignments in the constructor
So in your case you didn't declare the vars before the constructor:
import { Component } from '#angular/core';
import { NavController, NavParams } from 'ionic-angular';
import { DAOContas } from '../../dao/dao-contas';
#Component({
selector: 'page-list',
templateUrl: 'contas.html'
})
export class ContasPage {
// declare your vars here:
dao: any;
listcontas: any;
constructor(
public navCtrl: NavController
) {
this.dao = new DAOContas();
this.listcontas = this.dao.getList();
}
}
Same thing in your class you forgot to declare the var list:
export class DAOContas {
list: Array<{ descricao: string }>
constructor() {
this.list = [];
}
getList() {
this.list = [
{ descricao: "Alimentação" },
{ descricao: "Lazer" },
{ descricao: "Transporte" }
];
return this.list;
}
}
Also since your DAOContas to me looks like a data provider, I would probably think about turning it into a provider and injecting it into your page via constructor:
Make sure DAOContas is injectable:
import { Injectable } from '#angular/core'
#Injectable()
export class DAOContas {
list: Array<{ descricao: string }>
constructor() {
this.list = [];
}
getList() {
this.list = [
{ descricao: "Alimentação" },
{ descricao: "Lazer" },
{ descricao: "Transporte" }
];
return this.list;
}
}
Add it to your app.module.ts as provider:
import { DAOContas } from '../../src/providers/dao-contacts';
#NgModule({
declarations: [
bla
],
imports: [
BrowserModule,
IonicModule.forRoot(MyApp)
],
bootstrap: [IonicApp],
entryComponents: [
MyApp
],
providers: [
DAOContas,
StatusBar,
SplashScreen,
{ provide: ErrorHandler, useClass: IonicErrorHandler },
TestProvider
]
})
export class AppModule { }
Finally inject it to your page:
import { Component } from '#angular/core';
import { NavController } from 'ionic-angular';
import { DAOContas } from '../../providers/dao-contacts';
#Component({
selector: 'page-home',
templateUrl: 'home.html'
})
export class HomePage2 {
listcontas: any;
constructor(
public navCtrl: NavController,
public dao: DAOContas
) {
this.listcontas = this.dao.getList();
console.log(this.listcontas)
}
}