Web Api CRUD - internal server error / how to fix?

Question

User379720387 posted

This code all works as new usernames are added to the table. However, response._StatusCode says internal server error.

There is something going on with ActionContext and I have found some threads explaining the issue. Here is one

My knowledge is insufficient to determine how the suggested fixes are applicable what I am doing.

Please advise.

newUserName.created = DateTime.UtcNow;
        newUserName.modified = DateTime.UtcNow;
        var httpClient = ClientFactory.CreateClient("ServerAPI");
        var response = await httpClient.PostAsJsonAsync("api/usernames", newUserName);

the controller:

[HttpPost]
        public async Task<ActionResult<UserName>> PostUserName(UserName userName)
        {
            _context.Add(userName);
            await _context.SaveChangesAsync();

            return new CreatedAtRouteResult("GetUserName", new { id = userName.NameId }, userName);
        }

An unhandled exception occurred while processing the request.
InvalidOperationException: No route matches the supplied values.
Microsoft.AspNetCore.Mvc.CreatedAtRouteResult.OnFormatting(ActionContext context)

Stack Query Cookies Headers
InvalidOperationException: No route matches the supplied values.
Microsoft.AspNetCore.Mvc.CreatedAtRouteResult.OnFormatting(ActionContext context)
Microsoft.AspNetCore.Mvc.Infrastructure.ObjectResultExecutor.ExecuteAsync(ActionContext context, ObjectResult result)
Microsoft.AspNetCore.Mvc.ObjectResult.ExecuteResultAsync(ActionContext context)
Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.InvokeResultAsync(IActionResult result)
Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.InvokeNextResultFilterAsync<TFilter, TFilterAsync>()
Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.Rethrow(ResultExecutedContext context)
Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.ResultNext<TFilter, TFilterAsync>(ref State next, ref Scope scope, ref object state, ref bool isCompleted)
Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.InvokeResultFilters()
Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.InvokeNextResourceFilter()
Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.Rethrow(ResourceExecutedContext context)
Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.Next(ref State next, ref Scope scope, ref object state, ref bool isCompleted)
Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.InvokeFilterPipelineAsync()
Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.InvokeAsync()
Microsoft.AspNetCore.Routing.EndpointMiddleware.Invoke(HttpContext httpContext)
Microsoft.AspNetCore.Routing.EndpointRoutingMiddleware.Invoke(HttpContext httpContext)
Microsoft.AspNetCore.Cors.Infrastructure.CorsMiddleware.InvokeCore(HttpContext context)
Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.Invoke(HttpContext context)

Answer 1

User475983607 posted

Does the named route "GetUserName" exist?   

return new CreatedAtRouteResult("GetUserName", new { id = userName.NameId }, userName);

Answer 2

User379720387 posted

In the same controller:

[HttpGet("{id}")]
        public async Task<ActionResult<UserName>> GetUserName(int id)
        {
            var userName = await _context.UserNames.FindAsync(id);

            if (userName == null)
            {
                return NotFound();
            }

            return userName;
        }

Answer 3

User475983607 posted

That's not a named route; https://docs.microsoft.com/en-us/aspnet/core/mvc/controllers/routing?view=aspnetcore-3.1#route-name.

[HttpGet("{id}" Name = "GetUserName")]
public async Task<ActionResult<UserName>> GetUserName(int id)

Answer 4

User379720387 posted

Yup!

did this one as well:

[HttpDelete("{id}", Name = "DeleteUserName")]

thnx