CoderFunda
  • Home
  • About us
    • Contact Us
    • Disclaimer
    • Privacy Policy
    • About us
  • Home
  • Php
  • HTML
  • CSS
  • JavaScript
    • JavaScript
    • Jquery
    • JqueryUI
    • Stock
  • SQL
  • Vue.Js
  • Python
  • Wordpress
  • C++
    • C++
    • C
  • Laravel
    • Laravel
      • Overview
      • Namespaces
      • Middleware
      • Routing
      • Configuration
      • Application Structure
      • Installation
    • Overview
  • DBMS
    • DBMS
      • PL/SQL
      • SQLite
      • MongoDB
      • Cassandra
      • MySQL
      • Oracle
      • CouchDB
      • Neo4j
      • DB2
      • Quiz
    • Overview
  • Entertainment
    • TV Series Update
    • Movie Review
    • Movie Review
  • More
    • Vue. Js
    • Php Question
    • Php Interview Question
    • Laravel Interview Question
    • SQL Interview Question
    • IAS Interview Question
    • PCS Interview Question
    • Technology
    • Other

07 March, 2024

Async Initializers Swift MVVM not working

 Programing Coderfunda     March 07, 2024     No comments   

Hi cann someone help me I really have trouble to get these inits to work. Due to the Tasks im always getting yelled at by xcode the not all properties are initialized:
import Foundation
import FirebaseFirestore

class ChatViewModel: ObservableObject {

@Published var chat: ChatModel
@Published var opposingUser: User

init(oppUser: User) {
self.opposingUser = oppUser
Task {
if let fetchedChat = try? await fetchChat(oppUser: oppUser) {
self.chat = fetchedChat
}
}
}

init(chat: ChatModel) {
self.chat = chat
Task {
if let fetchedUser = try? await getOpposingUser(chat: chat) {
self.opposingUser = fetchedUser
}
}
}

@MainActor
func fetchChat(oppUser: User) async throws -> ChatModel? {
do {
let documents = try await Firestore.firestore()
.collection("conversations")
.whereField("users", arrayContains: UserService.shared.currentUser?.id ?? "error")
.whereField("users", arrayContains: oppUser.id)
.getDocuments()

for document in documents.documents {
guard let chatData = try? document.data(as: ChatModel.self) else {
print("[DEBUG fetchChat(oppUser: User)]: Error while converting Firebase Document to ChatModel ")
return nil
}

return chatData
}
} catch {
print("[DEBUG fetchChat(oppUser: User)]: \(error)")
throw error // Re-throw the error so it can be handled by the caller if needed
}
return nil
}

@MainActor
func getOpposingUser(chat: ChatModel) async throws -> User? {
do {
let opposingUid: String
if chat.users[0] == UserService.shared.currentUser?.id {
opposingUid = chat.users[1]
} else {
opposingUid = chat.users[0]
}

let document = try await Firestore
.firestore()
.collection("users")
.document(opposingUid)
.getDocument()

guard let opposingUserDoc = try? document.data(as: User.self) else {
// Handle the case where conversion to User fails
print("[DEBUG (getOpposingUser(chat: chatModel)]: Error while converting Firebase-Document to User ")
return nil
}

return opposingUserDoc

} catch {
print("[DEBUG (getOpposingUser(chat: chatModel)]: \(error) ")
throw error
}
return nil
}
}



I tried to "pre initilize" the variables with something like self.chat = ChatModel() but due to the nature of my Cahtmodel I can't init it without properties.
  • Share This:  
  •  Facebook
  •  Twitter
  •  Google+
  •  Stumble
  •  Digg
Email ThisBlogThis!Share to XShare to Facebook

Related Posts:

  • Laravel assign active based on route nameLaravel assign active based on route nameLaravel assign active based on route name    <li class="{{ Request::is('products*') ? 'active' :… Read More
  • Laravel assign class dynamically if condition true Laravel assign class dynamically if condition true <li class="nav-item {{ request()->is('blog') ? 'active' : ''}}">    &… Read More
  • Laravel asset     Laravel asset    // To access laravel assets    asset('sp-icon/Vodacom-Original.svg')    // To echo … Read More
  • Laravel asset resolving to http not https Laravel asset resolving to http not https    /** Enable HTTPS */    if(env('REDIRECT_HTTPS')) {        $… Read More
  • Laravel asset prevent browser caching Laravel asset prevent browser caching   // To access laravel assets    header("Expires: Tue, 03 Jul 2001 06:00:00 GMT");&nbs… Read More
Newer Post Older Post Home

0 comments:

Post a Comment

Thanks

Meta

Popular Posts

  • Spring boot app (error: method getFirst()) failed to run at local machine, but can run on server
    The Spring boot app can run on the online server. Now, we want to replicate the same app at the local machine but the Spring boot jar file f...
  • Log activity in a Laravel app with Spatie/Laravel-Activitylog
      Requirements This package needs PHP 8.1+ and Laravel 9.0 or higher. The latest version of this package needs PHP 8.2+ and Laravel 8 or hig...
  • Failed to install 'cordova-plugin-firebase': CordovaError: Uh oh
    I had follow these steps to install an configure firebase to my cordova project for cloud messaging. https://medium.com/@felipepucinelli/how...
  • Laravel auth login with phone or email
          <?php     Laravel auth login with phone or email     <? php     namespace App \ Http \ Controllers \ Auth ;         use ...
  • Cashier package and Blade files
    I'm a little confused about this Cashier package. I installed it using the Laravel website (with composer), but noticed there's no...

Categories

  • Ajax (26)
  • Bootstrap (30)
  • DBMS (42)
  • HTML (12)
  • HTML5 (45)
  • JavaScript (10)
  • Jquery (34)
  • Jquery UI (2)
  • JqueryUI (32)
  • Laravel (1017)
  • Laravel Tutorials (23)
  • Laravel-Question (6)
  • Magento (9)
  • Magento 2 (95)
  • MariaDB (1)
  • MySql Tutorial (2)
  • PHP-Interview-Questions (3)
  • Php Question (13)
  • Python (36)
  • RDBMS (13)
  • SQL Tutorial (79)
  • Vue.js Tutorial (68)
  • Wordpress (150)
  • Wordpress Theme (3)
  • codeigniter (108)
  • oops (4)
  • php (853)

Social Media Links

  • Follow on Twitter
  • Like on Facebook
  • Subscribe on Youtube
  • Follow on Instagram

Pages

  • Home
  • Contact Us
  • Privacy Policy
  • About us

Blog Archive

  • September (100)
  • August (50)
  • July (56)
  • June (46)
  • May (59)
  • April (50)
  • March (60)
  • February (42)
  • January (53)
  • December (58)
  • November (61)
  • October (39)
  • September (36)
  • August (36)
  • July (34)
  • June (34)
  • May (36)
  • April (29)
  • March (82)
  • February (1)
  • January (8)
  • December (14)
  • November (41)
  • October (13)
  • September (5)
  • August (48)
  • July (9)
  • June (6)
  • May (119)
  • April (259)
  • March (122)
  • February (368)
  • January (33)
  • October (2)
  • July (11)
  • June (29)
  • May (25)
  • April (168)
  • March (93)
  • February (60)
  • January (28)
  • December (195)
  • November (24)
  • October (40)
  • September (55)
  • August (6)
  • July (48)
  • May (2)
  • January (2)
  • July (6)
  • June (6)
  • February (17)
  • January (69)
  • December (122)
  • November (56)
  • October (92)
  • September (76)
  • August (6)

  • Failed to install 'cordova-plugin-firebase': CordovaError: Uh oh - 9/21/2024
  • pyspark XPath Query Returns Lists Omitting Missing Values Instead of Including None - 9/20/2024
  • SQL REPL from within Python/Sqlalchemy/Psychopg2 - 9/20/2024
  • MySql Explain with Tobias Petry - 9/20/2024
  • How to combine information from different devices into one common abstract virtual disk? [closed] - 9/20/2024

Laravel News

  • Improved Installation and Frontend Hooks in Laravel Echo 2.1 - 5/15/2025
  • Filter Model Attributes with Laravel's New except() Method - 5/13/2025
  • Arr::from() Method in Laravel 12.14 - 5/14/2025
  • Streamline API Resources with Laravel's Fluent Methods - 5/13/2025
  • Customize URL Handling with Laravel's Macroable URI Class - 5/13/2025

Copyright © 2025 CoderFunda | Powered by Blogger
Design by Coderfunda | Blogger Theme by Coderfunda | Distributed By Coderfunda