IOptions validation error occurs when trying to run a dotnet app

Question

I have built a Discord bot app with C# and I'm trying to run it using dotnet app.dll, but I instantly encounter an error: Microsoft.Extensions.Options.OptionsValidationException: A validation error has occurred.

This issue does not happen if I use the dotnet run command from the project directory. The bot itself is running on a Ubuntu VPS.

Here is how I register the options to services:

IHost host = Host.CreateDefaultBuilder(args)
        .UseSerilog()
        .ConfigureDiscordHost((context, config) => {
           // ...
        })
        .UseInteractionService((context, config) => 
        {
           // ...
        })
        .ConfigureAppConfiguration((context, config) => 
        {
            config.SetBasePath(context.HostingEnvironment.ContentRootPath);
            config.AddJsonFile("words_list.json");
        })
        .ConfigureServices((context, services) =>
        {
            // ...
            services.Configure<BotOptions>(options => context.Configuration.GetSection("BotOptions").Bind(options));
            services.AddOptions<WordSearchSettings>().Bind(context.Configuration);
            services.Configure<HostOptions>(
                    opts => opts.ShutdownTimeout = TimeSpan.FromSeconds(15));
        })
        .Build();

    await host.RunAsync(); // Error occurs here.

And the WordSearchSettings class itself:

public struct WordSearchDifficulty 
{
    public int StartTimestamp { get; set; }
    public int EndTimestamp { get; set; }
    public int WordsInGrid { get; set; }
    public int GridSize { get; set; }
    public string Message { get; set; }
    public List<string> Words { get; set; }
}

public class WordSearchSettings
{
    public Dictionary<string, WordSearchDifficulty> Difficulties { get; set; }
}

I think the issue lies with WordSearchSettings, since I have created a very similar bot before without adding that class.

I have tried using ConfigureAndValidate<TOptions>() method from this package, but it did not fix the issue. There is also almost no information on this error on Google.

IOptions validation error occurs when trying to run a dotnet app

0 Answers0