Seeking assistance with resolving an issue in my CRUD app using Firebase. I am new to TypeScript and Firebase, and have been working on this for days. Any help would be greatly appreciated. Thank you.
Here is a snippet from my TypeScript file:
import { Injectable } from '@angular/core';
import { Item } from './item';
import { AngularFireObject, AngularFireList, AngularFireDatabase } from 'angularfire2/database';
import * as firebase from 'firebase';
@Injectable()
export class ItemService {
private basePath: string = '/items';
items: AngularFireList<Item[]> = null;
item: AngularFireObject<Item> = null;
constructor(private db: AngularFireDatabase) { }
getItemsList(query={}): AngularFireList<Item[]> {
this.items = this.db.list('items', ref => ref.orderByChild('value'));
return this.items
}
// Retrieve a single observable item
getItem(key: string): AngularFireObject<Item> {
const itemPath = `${this.basePath}/${key}`;
this.item = this.db.object(itemPath)
return this.item
}
createItem(item: Item): void {
this.items.push(item) <--- encountering an error here
.catch(error => this.handleError(error))
}
// Update an existing item
updateItem(key: string, value: any): void {
this.items.update(key, value)
.catch(error => this.handleError(error))
}
// Delete a single item
deleteItem(key: string): void {
this.items.remove(key)
.catch(error => this.handleError(error))
}
// Delete the entire list of items
deleteAll(): void {
this.items.remove()
.catch(error => this.handleError(error))
}
// Default error handling for all actions
private handleError(error) {
console.log(error)
}
}
The error lies within createItem() function and is reflected in my console like this
ERROR in src/app/items/shared/item.service.ts(31,19): error TS2345: Argument of type 'Item' is not assignable to parameter of type 'Item[]'. Type 'Item' is missing the following properties from type 'Item[]': length, pop, push, concat, and 26 more.