Become a better .NET full stack web developer
Continuing with weird errors you might encounter in JavaScript world, I have another one: Visual Studio Code IntelliSense loading infinitely 😀 Solution included, of course!
The symptoms of this issue are putting your mouse on something where you’d expect the IntelliSense guidelines, but instead you only see the “Loading…” text.
In this short article, I’m sharing the reason of this issue and my way of fixing it.
Have you ever needed to synchronize types in your frontend app with the backend API?
If you ever had an API action defined like that in your controller:
| public record UserViewModel(Guid Id, string Name, string LastName, string Login, | |
| bool IsActive, int LoyaltyPoints, AddressViewModel? Address = null); | |
| // … | |
| public List<UserViewModel> AllUsers() | |
| { | |
| var usersViewModels = TestDataGenerator.GetTestUsers(); | |
| return usersViewModels.OrderBy(uvm => uvm.Name).ToList(); | |
| } |
and fetched this data using TypeScript in the following way:
| getAllUsers = async (): Promise<UserViewModel[]> => { | |
| const url = `${this.apiEndpoint}/AllUsers`; | |
| const response = await fetch(url); | |
| const users = (await response.json()) as UserViewModel[]; | |
| return users; | |
| }; |
at some point, you probably also experienced the desynchronization of backend (C#, in our example) and frontend (TypeScript) types definitions. What if someone has changed the C# version of UserViewModel, but no one corrected its TypeScript’s equivalent?
Your TypeScript fetching code will tell nothing about that. There will be no error, even though the fetched data doesn’t match the expected UserViewModel type.
I’ll try to address this issue in this article 🙂 Let’s see how typing API responses with zod can help us here.
I recently needed to write test progress to the console with NUnit. The task we want to solve here is basically the TODO part of this snippet:
| [TestFixture] | |
| public class MyTests | |
| { | |
| [Test] | |
| public void SampleTest() | |
| { | |
| // some operations here, like starting a server for tests in-memory… | |
| // TODO: inform the 'user' (the one who runs the test) that the server is already running | |
| while (true) | |
| { | |
| // keep it running on purpose (e.g. for E2E tests) | |
| } | |
| } | |
| } |
The title picture of this article shows the end result. If you want to know the solution, keep reading 🙂
I recently deployed my .NET 6 application to Microsoft Azure. The app uses NHibernate for working with SQL Server database. After some time, I started getting an unhandled exception when opening the application:
NHibernate.Exceptions.GenericADOException: could not load an entity:
...
---> Microsoft.Data.SqlClient.SqlException (0x80131904): Database 'myappdb' on server 'myapp.database.windows.net' is not currently available. Please retry the connection later. If the problem persists, contact customer support, and provide them the session tracing ID of '{EB501CF2-2F21-4E28-9042-2B83EEE57B91}'.The database is not currently available was very interesting to me. I struggled a bit with solving that, so if you want to know how I did it – continue reading 🙂
I recently struggled for a while with an npm error thrown when executing npm install of some package. The error message was npm ERR! enoent ENOENT: no such file or directory, rename 'D:\\WebApp\\node_modules\\lz-string' -> 'D:\\WebApp\\node_modules.lz-string.DELETE'
Finally, I found a solution and a reason for that issue.
Today I’d like to share with you a very interesting concept in software testing – Assert Object pattern. It makes the Assert part of a test much simpler and more readable. Let’s dive right into it 😉
For the past year I’ve been working on a JavaScript project for my client. We have a mid-size web application. We use React as the web development framework. Few months ago we decided to start migrating to TypeScript.
Today I can say that it was the best decision we could make. TypeScript makes working with JavaScript, which is sometimes surprising and quite hard to understand, so much better experience. However, there were some challenges on this journey. If you want to know what issues we met and how we solved them, but also what huge advantages TypeScript gave us – read on 😉
I will not discuss TypeScript itself in this article. This is a pure recap of challenges and the experience I gained when migrating to TypeScript.
I’ve been working remotely from over the world for 7 month already. During this time, I lived in 7 diferent Asian countries. All that time I worked remotely being a so called digital nomad 🙂 Today I’d like to share with you 8 tips for digital nomads I discovered during this time that make my everyday nomadic life easier.
After writing our first Flutter app in less than 30 minutes, today we’re taking a look at Flutter widgets. If you want to know what is a widget in Flutter, what are widgets types and how to use them – this article is for you 🙂
You may know my past affair with Xamarin, which somehow died a natural death. In today’s post, we’re taking a look at Flutter. If you want to know what is Flutter and how to build your first Flutter app in less than 30 minutes (including installation time) – let’s jump right into it 😉
