✅ Generic DI in minimal APIs
I want register all the dependencies in one place for the endpoints.
public static void MapAuthEndpoints(this WebApplication app)
{
var auth = app.MapGroup("auth");
auth.MapPost("login",LoginAsync);
auth.MapGet("role/{id:Guid}",GetRoleAsync);
}
private static async Task<ApiResponse> LoginAsync(HttpContext context, LoginRequest loginRequest)
{
var response = await mediator.Send(new LoginCommand(loginRequest));
return new ApiResponse(requestPayload: requestPayload, statusCode: context.Response.StatusCode, response: response);
}
How can i inject IMediator once for all endpoints
24 Replies
afaik u just put the dependency in the parameter list
That i have to do for each endpoint
LoginAsync(HttpContext context, LoginRequest loginRequest, IMediator mediator)Can we do it somewhere once like we were doing in Controller based method
not that im aware of
This one i have tried
using (var scope = app.Services.CreateScope())
{
var service = scope.ServiceProvider.GetRequiredService<AuthController>();
service.MapAuthEndpoints(app);
}
I tried like this
But it gives IServiceProvider is disposed error
{
"statusCode": 500,
"message": "An error Occurred",
"requestDuration": "776 ms",
"response": "Cannot access a disposed object.\r\nObject name: 'IServiceProvider'."
}
where exactly are u executing this?
in program.cs
can u show the whole file?
public static void MapAuthEndpoints(this WebApplication app)
{
using var scope = app.Services.CreateScope();
IMediator mediator = scope.ServiceProvider.GetRequiredService<IMediator>();
RequestPayload requestPayload = scope.ServiceProvider.GetRequiredService<RequestPayload>();
var auth = app.MapGroup("auth");
auth.MapPost("login", async (HttpContext context, LoginRequest loginRequest) =>
{
var response = await mediator.Send(new LoginCommand(loginRequest));
return new ApiResponse(requestPayload: requestPayload, statusCode: context.Response.StatusCode, response: response);
});
auth.MapGet("role/{id:Guid}",GetRoleAsync);
}
Tried this.
This one also gives the same error
show me how u register the services
using CQRS.Api;
using CQRS.Api.Controllers;
using CQRS.Application;
using CQRS.Contracts;
using CQRS.Infrastructure;
var builder = WebApplication.CreateBuilder(args);
var Services = builder.Services;
#region Configure Services
Services.AddControllers();
Services.AddScoped<RequestPayload>();
Services.AddApplication()
.AddInfrastructure(builder.Configuration);
#endregion
var app = builder.Build();
#region Configure Global Exception Handling
app.UseExceptionHandler("/error");
//app.UseExceptionHandler(ex =>
//{
// ex.Run(async context =>
// {
// context.Response.StatusCode = StatusCodes.Status500InternalServerError;
// context.Response.ContentType = "text/plain";
// Exception? exception = context.Features.Get<IExceptionHandlerFeature>()?.Error;
// var requestPayload = context.RequestServices.GetRequiredService<RequestPayload>();
// var respose = new ApiResponse(requestPayload: requestPayload,
// statusCode: StatusCodes.Status500InternalServerError,
// message: "An unexpected error Occurred",
// response: exception.Message);
// await context.Response.WriteAsJsonAsync(respose);
// });
//});
#endregion
#region Configure Pipeline & Middleware
app.UseMiddleware<Middleware>();
app.UseHttpsRedirection();
app.UseAuthentication();
app.UseAuthorization();
#endregion
#region Configure COntrollers & Minimal APIs
app.MapControllers();
//Minimal API for Register/Login
app.MapAuthEndpoints();
//using (var scope = app.Services.CreateScope())
//{
// var service = scope.ServiceProvider.GetRequiredService<AuthController>();
// service.MapAuthEndpoints(app);
//}
#endregion
app.Run();
This is my program.cs
public static IServiceCollection AddApplication(this IServiceCollection services)
{
services.AddMediatR(config => config.RegisterServicesFromAssembly(typeof(DependencyInjection).Assembly));
//builder.Services.AddMediatR(config => config.RegisterServicesFromAssemblyContaining<Program>());
services.AddAutoMapper(typeof(DependencyInjection));
services.AddValidatorsFromAssembly(Assembly.GetExecutingAssembly());
services.AddScoped(typeof(IPipelineBehavior<,>), typeof(ValidationBehavior<,>));
return services;
}
the problem lies basically there, u create a scope during configuration, basically before the web server runs.
when u leave the method the scope will be disposed and all scoped and transient services as well
But this is in another static class
I am using Extension Method
so basically either use minimal apis and inject all dependencies in the method or use the controllers
Okay Thanks!!
also for the next time please use $code blocks 😉
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Cool
Thanks for the tip
np
and also if ur questions are answered please $close the thread to mark it as such, ofc only if it is
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