C#•6mo ago

options pattern not working

migrated not so long ago .net 8 did they change something with the options pattern? it seems to not work anymore for some reason that i cant explain myself see code below:

builder.Services.AddOptions<JwtOptions>(JwtOptions.SectionName)
    .Bind(config.GetSection(JwtOptions.SectionName));

builder.Services.AddOptions<DatabaseConnectionOptions>(DatabaseConnectionOptions.SectionName)
    .Bind(config.GetSection(DatabaseConnectionOptions.SectionName));

builder.Services.AddOptions<JwtOptions>(JwtOptions.SectionName)
    .Bind(config.GetSection(JwtOptions.SectionName));

builder.Services.AddOptions<DatabaseConnectionOptions>(DatabaseConnectionOptions.SectionName)
    .Bind(config.GetSection(DatabaseConnectionOptions.SectionName));

inside here it should retrive the stuff from the appsettings.json

{
  "Logging": {
    "LogLevel": {
      "Default": "Information",
      "Microsoft.AspNetCore": "Warning"
    }
  },
  "ConnectionStrings": {
    "DefaultConnection": "Server=db;Database=postgres;User ID=admin;Password=admin;"
  },
  "Jwt": {
    "Key": "HIDDEN_API_KEY"
  },
  "AllowedHosts": "*"
}

{
  "Logging": {
    "LogLevel": {
      "Default": "Information",
      "Microsoft.AspNetCore": "Warning"
    }
  },
  "ConnectionStrings": {
    "DefaultConnection": "Server=db;Database=postgres;User ID=admin;Password=admin;"
  },
  "Jwt": {
    "Key": "HIDDEN_API_KEY"
  },
  "AllowedHosts": "*"
}

but whenever i hit my AddInfrastructure point i get an error that it would be null see her:

        ...
        // Database
        var options = serviceCollection.BuildServiceProvider().GetRequiredService<IOptions<DatabaseConnectionOptions>>();
        
        if (string.IsNullOrWhiteSpace(options.Value.DefaultConnection))
        {
            throw new InvalidOperationException($"{DatabaseConnectionOptions.SectionName}:{nameof(DatabaseConnectionOptions.DefaultConnection)} cannot be null or whitespace");
        }
        
        serviceCollection.AddDbContext<AppDbContext>(dbOptions =>
        {
            dbOptions.UseNpgsql(options.Value.DefaultConnection);
        });
        
        serviceCollection.AddScoped<IUnitOfWork>(serviceProvider => serviceProvider.GetRequiredService<AppDbContext>());
        
        return serviceCollection;

        ...
        // Database
        var options = serviceCollection.BuildServiceProvider().GetRequiredService<IOptions<DatabaseConnectionOptions>>();
        
        if (string.IsNullOrWhiteSpace(options.Value.DefaultConnection))
        {
            throw new InvalidOperationException($"{DatabaseConnectionOptions.SectionName}:{nameof(DatabaseConnectionOptions.DefaultConnection)} cannot be null or whitespace");
        }
        
        serviceCollection.AddDbContext<AppDbContext>(dbOptions =>
        {
            dbOptions.UseNpgsql(options.Value.DefaultConnection);
        });
        
        serviceCollection.AddScoped<IUnitOfWork>(serviceProvider => serviceProvider.GetRequiredService<AppDbContext>());
        
        return serviceCollection;

options classes have similar schema each:

public class DatabaseConnectionOptions
{
    public const string SectionName = "ConnectionStrings";
    
    public string? DefaultConnection { get; set; }
}

public class DatabaseConnectionOptions
{
    public const string SectionName = "ConnectionStrings";
    
    public string? DefaultConnection { get; set; }
}

someone knows how to fix this?

12 Replies

RD Dev•6mo ago

you might be missing the configuration setup for the sections in your appsettings.json

Dropps•6mo ago

what you mean by that?

RD Dev•6mo ago

I mean, ensure that the structure of your appsettings.json file matches the section names used in your options classes (JwtOptions and DatabaseConnectionOptions).

Dropps•6mo ago

it does match already as you see? or am i missing something

RD Dev•6mo ago

Make sure you are loading the configuration properly using the appropriate code at the beginning of your application.

Dropps•6mo ago

its what iam doing above it

WebApplicationBuilder builder = WebApplication.CreateBuilder(args);
ConfigurationManager config = builder.Configuration;

builder.Services.AddOptions<JwtOptions>()
    .Bind(config.GetSection(JwtOptions.SectionName));

builder.Services.AddOptions<DatabaseConnectionOptions>()
    .Bind(config.GetSection(DatabaseConnectionOptions.SectionName));

WebApplicationBuilder builder = WebApplication.CreateBuilder(args);
ConfigurationManager config = builder.Configuration;

builder.Services.AddOptions<JwtOptions>()
    .Bind(config.GetSection(JwtOptions.SectionName));

builder.Services.AddOptions<DatabaseConnectionOptions>()
    .Bind(config.GetSection(DatabaseConnectionOptions.SectionName));

.net8 web api

RD Dev•6mo ago

Your configuration binding for JwtOptions and DatabaseConnectionOptions appears correct in the provided .NET code snippet for a web API I don't have time to help you. Hopefully I gave you enough information or wait for someone else

Unknown User•6mo ago

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Dropps•6mo ago

how does the validation then take place? does it throw an exception or?

Unknown User•6mo ago

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Dropps•6mo ago

then we are in a "double" concern issue state cause i register everything using clean architecture and extension methods for each layer but thanks

Unknown User•6mo ago

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options pattern not working