export class UsingNgTemplateRefComponent implements OnInit,AfterViewInit {
#ViewChild('demoNg') demoNg: TemplateRef<DemoNgComponent>;
constructor(private http:HttpClient) { }
}
In above line "demoNg" giving error like : See Error Snapshot Here
Related
I am trying to retrieve data from my firestore using ember.js and emberfire.
i have a simple movie database. All that is in it right now is 1 document but for some reason when i try and retrieve the data, i keep getting "Cannot read property 'type' of undefined"! i understand that this is a JSONAPI issue but nothing seems to fix it.
My Route:
import Route from '#ember/routing/route';
export default class MovieRoute extends Route {
async model() {
this.store.findAll('movies').then(function(movie) {
console.log(movie);
});
}
}
My Model:
import Model, { attr } from '#ember-data/model';
export default class MoviesModel extends Model {
#attr('string') title;
}
Now it was my understanding that the default JSONAPISerializer is the default one but i tried adding a serializer anyway and my error changes to: Assertion Failed: normalizeResponse must return a valid JSON API document.
My adapter:
import FirestoreAdapter from 'emberfire/adapters/firestore';
export default FirestoreAdapter.extend({
// Uncomment the following lines to enable offline persistence and multi-tab support
// enablePersistence: true,
// persistenceSettings: { synchronizeTabs: true },
});
My Serializer:
import JSONAPISerializer from '#ember-data/serializer/json-api';
export default class ApplicationSerializer extends JSONAPISerializer {}
it is also my understanding that the way the JSON is to be accepted is:
{
data {
type: 'movies',
id: 1,
attributes {
title: 'ghostbusters'
}
}
}
so i also created a new document in the firestore, following this same format. Still no luck.
Can anyone point me in the right direction as to how to get the correct data returning from the firestore?
**edited --
error message:
This question already has answers here:
Ionic 4. Alternative to NavParams
(8 answers)
Closed 4 years ago.
I would like to pass a JSON object to another page. What I've tried is to pass the JSON string using Angular router ActivatedRoute like this:
this.router.navigate(['details', details]);
and then retrieve it like this:
import { ActivatedRoute } from '#angular/router';
constructor(private activatedRoute: ActivatedRoute) {
}
ngOnInit() {
this.activatedRoute.params.subscribe(extras => {
console.log(extras);
this.JSONObject = extras;
});
}
It is possible to do it this way but what happened was the nested JSON objects becomes inaccessible. It turns into this string:
"[object Object]"
The stringified JSON object is fine and accessible before I pass it. Another problem is that it appends the JSON string to the url so it doesn't look that nice. From what I read as well, it is not a good practice to pass something more than just an id this way.
I am thinking of something like passing objects as intent extras between activities in Android. I've searched the documentations, forums, and previous stackoverflow questions but I didn't found any solution that enables me to achieve this. Is there any other way of passing objects between pages using Angular router in Ionic4?
I solved it using a service with a simple setter and getter just like in this question that I later found:
Ionic 4. Alternative to NavParams
First, I create a service with setter & getter:
import { Injectable } from '#angular/core';
#Injectable({
providedIn: 'root'
})
export class NavExtrasService {
extras: any;
constructor() { }
public setExtras(data){
this.extras = data;
}
public getExtras(){
return this.extras;
}
}
Let's say I'm navigating from page A to page B, in page A:
this.navExtras.setExtras(extras)
this.router.navigateByUrl('page-b');
Then in Page B, I retrieve the extras this way:
this.location = navExtras.getExtras();
It works so far although I'm still not sure if there are better ways to do it..
I receive the following error message:
Error resolving template [catalog/getCatalogItemFromCatalog/catalogItemId/3916677], template might not exist or might not be accessible by any of the configured Template Resolvers
I am trying to reach my service and the method using this url:
http://192.168.99.100:31003/catalog/getCatalogItemFromCatalog/catalogItemId/3916677
Controller:
#Controller
#RequestMapping("catalog")
public class CatalogController {
#GetMapping("/getCatalogItemFromCatalog/catalogItemId/{catalogItemId}")
public CatalogItem getCatalogItemFromCatalog(#PathVariable Integer catalogItemId){
List<Catalog> catalogs = getAllCatalogs();
Optional<CatalogItem> optionalCatalogItem = Optional.empty();
for(Catalog catalog : catalogs){
optionalCatalogItem = catalog.getCatalogItems().stream().filter(it -> it.getCatalogItemId().equals(catalogItemId)).findFirst();
}
return optionalCatalogItem.orElse(null);
}
#GetMapping("/system/ipaddr")
public String getIpAddr() {
List<String> response;
response = runSystemCommandAndGetResponse(IP_ADDR);
return new Gson().toJson(response);
}
}
When I curl
http://192.168.99.100:31003/catalog/system/ipaddr
I have no issues.
I am testing for hours now and nothing seems to work, I have no idea why its failing tho.
you have #Controller on your class which means spring will try to resolve the return type of all your methods inside the controller using all the available templateResolvers.
by using #ResponseBody spring will wrap the return type inside the response (after converting it) directly then returns it to the client, it's similar to using #RestController instead #Controller
I'm trying to learn a bit about Laravel4 framework, so I decided to setup a small restful connection with a mysql database using the
php artisan controller:make ProductsController.
Unfortunatelly after running the app I get this error message:
{"error":{"type":"Symfony\\Component\\Debug\\Exception\\FatalErrorException","message":"Class 'Products' not found","file":"\/Applications\/MAMP\/htdocs\/shoppingCart\/app\/controllers\/ProductsController.php","line":14}}
anybody knows how can I fix that ? thank's in advance.
Here is the relevant code:
1) my route:
Route::get('/', function()
{ return View::make('home');});
Route::resource('products','ProductsController');
2) controller:
class ProductsController extends BaseController {
public function index()
{
return Products::all()->toArray();
}
etc...
3) model:
Class Products extends Eloquent{
protected $table = 'products';}
I've done also composer dump-autoload
I'm struggling with Play and JPA in order to be able to use two different javax.persistence.Entity model associated to two different persistence units (needed to be able to connect to different DB - for example an Oracle and a MySQL db).
The problem come from the Transaction which is always bind to the default JPA persitenceUnit (see jpa.default option).
Here is two controller actions which show the solution I found to manually define the persistence :
package controllers;
import models.Company;
import models.User;
import play.db.jpa.JPA;
import play.db.jpa.Transactional;
import play.mvc.Controller;
import play.mvc.Result;
public class Application extends Controller {
//This method run with the otherPersistenceUnit
#Transactional(value="other")
public static Result test1() {
JPA.em().persist(new Company("MyCompany"));
//Transaction is run with the "defaultPersistenceUnit"
JPA.withTransaction(new play.libs.F.Callback0() {
#Override
public void invoke() throws Throwable {
JPA.em().persist(new User("Bobby"));
}
});
return ok();
}
//This action run with the otherPersistenceUnit
#Transactional
public static Result test2() {
JPA.em().persist(new User("Ryan"));
try {
JPA.withTransaction("other", false, new play.libs.F.Function0<Void>() {
public Void apply() throws Throwable {
JPA.em().persist(new Company("YourCompany"));
return null;
}
});
} catch (Throwable throwable) {
throw new RuntimeException(throwable);
}
return ok();
}
}
This solution doesn't seem to be really "clean". I'd like to know if you know a better way to avoid the need to manually modify the transaction used.
For this purpose, I created a repo on git with a working sample application which shows how I configured the project.
https://github.com/cm0s/play2-jpa-multiple-persistenceunit
Thank you for your help
i met the same problem, too. too many advices are about PersistenceUnit annotation or getJPAConfig. but both them seem not work in play framework.
i found out a method which works well in my projects. maybe you can try it.
playframework2 how to open multi-datasource configuration with jpa
gud luk!