Develop Reference

How can to map to a wrapper class using Mapster?

Based on my project I need to create a wrapper for “IFormFile”, Actually I created a “AppFileProxy” class and “IAppFile” interface for this purpose :
IAppFile.cs :
public interface IAppFile
{
string Name { get; }
string FileName { get; }
string ContentType { get; }
long Length { get; }
void CopyTo(Stream target);
Task CopyToAsync(Stream target, CancellationToken cancellationToken = default);
Stream OpenReadStream();
}
AppFileProxy.cs :
public class AppFileProxy : IAppFile
{
private readonly IFormFile _formFile;
public AppFileProxy(IFormFile formFile)
{
_formFile = formFile ?? throw new ArgumentNullException(nameof(formFile));
}
public string Name => _formFile.Name;
public string FileName => _formFile.FileName;
public string ContentType => _formFile.ContentType;
public long Length => _formFile.Length;
public void CopyTo(Stream target)
{
_formFile.CopyTo(target);
}
public Task CopyToAsync(Stream target, CancellationToken cancellationToken = default)
{
return _formFile.CopyToAsync(target, cancellationToken);
}
public Stream OpenReadStream()
{
return _formFile.OpenReadStream();
}
}
Now, I want to Map “IFormFile” to “IAppFile” by using Mapster in the action controller as shown below :
CompanyDto.cs :
public class CompanyDto
{
public string Name { get; set; }
public IFormFile Logo { get; set; }
}
CompanyMapDto.cs :
public class CompanyMapDto : IRegister
{
public int Id { get; set; }
public string Name { get; set; }
public IAppFile Logo { get; set; }
public void Register(TypeAdapterConfig config)
{
config.ForType<CompanyDto, CompanyMapDto>()
.Map(dest => dest.Logo, src => new AppFileProxy(src.Logo));
}
}
action controller :
[HttpPost]
[Route("[controller]/[action]")]
public async Task<IActionResult> AddCompanyWithLogo([FromForm]CompanyDto dto)
{
CompanyMapDto company = dto.Adapt<CompanyMapDto>();
var stream = company.Logo.OpenReadStream();
return Ok();
}
But When I call action I get exception error for OpenReadStream() method :
System.NotImplementedException: The method or operation is not implemented.
at GeneratedType_1.OpenReadStream()
at MapsterInDotNet.Controllers.CompaniesController.AddCompanyWithLogo(CompanyDto dto) in C:\Users\Mohsen\source\repos\UseMapsterInDotNet\MapsterInDotNet\MapsterInDotNet\Controllers\CompaniesController.cs:line 52
at Microsoft.AspNetCore.Mvc.Infrastructure.ActionMethodExecutor.TaskOfIActionResultExecutor.Execute(IActionResultTypeMapper mapper, ObjectMethodExecutor executor, Object controller, Object[] arguments)
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.<InvokeActionMethodAsync>g__Awaited|12_0(ControllerActionInvoker invoker, ValueTask`1 actionResultValueTask)
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.<InvokeNextActionFilterAsync>g__Awaited|10_0(ControllerActionInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Rethrow(ActionExecutedContextSealed context)
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.<InvokeInnerFilterAsync>g__Awaited|13_0(ControllerActionInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeFilterPipelineAsync>g__Awaited|20_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeAsync>g__Awaited|17_0(ResourceInvoker invoker, Task task, IDisposable scope)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeAsync>g__Awaited|17_0(ResourceInvoker invoker, Task task, IDisposable scope)
at Microsoft.AspNetCore.Routing.EndpointMiddleware.<Invoke>g__AwaitRequestTask|6_0(Endpoint endpoint, Task requestTask, ILogger logger)
at Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.Invoke(HttpContext context)
at Swashbuckle.AspNetCore.SwaggerUI.SwaggerUIMiddleware.Invoke(HttpContext httpContext)
at Swashbuckle.AspNetCore.Swagger.SwaggerMiddleware.Invoke(HttpContext httpContext, ISwaggerProvider swaggerProvider)
at Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.Invoke(HttpContext context)
How do I resolve this?

Well. I managed to make it work. You have to explicitly configurate mapping from IAppFile to IFormFile.
So instead of your configuration:
config.ForType<CompanyDto, CompanyMapDto>()
.Map(dest => dest.Logo, src => new AppFileProxy(src.Logo));
Use this:
TypeAdapterConfig<IFormFile, IAppFile>.ForType() // Or NewConfig()
.MapWith(src => new AppFileProxy(src));

ArgumentNullException with Nullable Types, Text.Json and EF Core

After about 15 hours of troubleshooting, I am just so confused at what is happening, and no longer sure what the real issue is, so I plead for any suggestions or hints you may have.
I have a ASP.NET Core project using .NET 5, EntityFramework Core, Text.Json and Nullable Reference Types. When my models have a parameterless constructor, everything seems to work fine, but if I try to create a parameterized constructor I start having issues.
When requesting a list of entries, it seems fine, but request a single entry returns an ArgumentNullException. The problem seems to come from a lack of parameterless constructor, but this introduces problems with the nonnullable properties.
After having tried to isolate the problem, it still appears when all navigational properties is removed, so the problem appears in the following basic application.
As Id, Name and IsComplete are nonnullable, I understand that they should be in a parameterized constructor, as mentioned in the docs:
When nullable reference types are enabled, the C# compiler emits warnings for any uninitialized non-nullable property, as these would contain null. As a result, the following, common way of writing entity types cannot be used:
public class CustomerWithWarning
{
public int Id { get; set; }
// Generates CS8618, uninitialized non-nullable property:
public string Name { get; set; }
}
Constructor binding is a useful technique to ensure that your non-nullable properties are initialized:
public class CustomerWithConstructorBinding
{
public int Id { get; set; }
public string Name { get; set; }
public CustomerWithConstructorBinding(string name)
{
Name = name;
}
}
Following is included most of the (relevant) code:
Error-message and stack-trace at bottom:
TodoItem.cs (not working):
using System.Text.Json.Serialization;
namespace TodoApi.Models
{
public class TodoItem
{
[JsonConstructor]
public TodoItem(long id, string name, bool isComplete)
{
(Id, Name, IsComplete) = (id, name, isComplete);
}
public long Id { get; set; }
public string Name { get; set; }
public bool IsComplete { get; set; }
}
}
TodoItem.cs (working, but undesirable):
using System.Text.Json.Serialization;
namespace TodoApi.Models
{
public class TodoItem
{
publicTodoItem()
{
}
[JsonConstructor]
public TodoItem(long id, string name, bool isComplete)
{
(Id, Name, IsComplete) = (id, name, isComplete);
}
public long Id { get; set; }
public string Name { get; set; }
public bool IsComplete { get; set; }
}
}
TodoItemsController.cs (auto-generated):
using System.Collections.Generic;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;
using TodoApi.Models;
namespace TodoApi.Controllers
{
[Route("api/[controller]")]
[ApiController]
public class TodoItemsController : ControllerBase
{
private readonly TodoContext _context;
public TodoItemsController(TodoContext context)
{
_context = context;
}
// GET: api/TodoItems
[HttpGet]
public async Task<ActionResult<IEnumerable<TodoItem>>> GetTodoItems()
{
return await _context.TodoItems.ToListAsync();
}
// GET: api/TodoItems/5
[HttpGet("{id}")]
public async Task<ActionResult<TodoItem>> GetTodoItem(long id)
{
var todoItem = await _context.TodoItems.FindAsync(id);
if (todoItem == null)
{
return NotFound();
}
return todoItem;
}
}
}
TodoContext.cs:
using Microsoft.EntityFrameworkCore;
namespace TodoApi.Models
{
public class TodoContext : DbContext
{
public TodoContext(DbContextOptions<TodoContext> options)
: base(options)
{
}
public DbSet<TodoItem> TodoItems { get; set; }
}
}
Startup.cs:
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using System.Text.Json.Serialization;
using TodoApi.Models;
namespace TodoApi
{
public class Startup
{
public Startup(IConfiguration configuration)
{
Configuration = configuration;
}
public IConfiguration Configuration { get; }
// This method gets called by the runtime. Use this method to add services to the container.
public void ConfigureServices(IServiceCollection services)
{
services.AddControllers();
services.AddMvc().AddJsonOptions(
opt => opt.JsonSerializerOptions.ReferenceHandler = ReferenceHandler.Preserve
);
services.AddDbContext<TodoContext>(opt =>
{
opt.UseNpgsql(string.Format(
"host={0};port={1};database={2};username={3};password={4}",
"localhost",
"5432",
"databaseNameHere",
"databaseUsername",
"databasePassword"));
opt.UseLazyLoadingProxies();
}
);
}
// This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
app.UseHttpsRedirection();
app.UseRouting();
app.UseAuthorization();
app.UseEndpoints(endpoints =>
{
endpoints.MapControllers();
});
}
}
}
Error-message:
An unhandled exception occurred while processing the request.
ArgumentNullException: Value cannot be null. (Parameter 'obj')
System.OrdinalIgnoreCaseComparer.GetHashCode(string obj)
Stack-trace:
fail: Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware[1]
An unhandled exception has occurred while executing the request.
System.ArgumentNullException: Value cannot be null. (Parameter 'obj')
at System.OrdinalIgnoreCaseComparer.GetHashCode(String obj)
at System.Text.Json.JsonClassInfo.ParameterLookupKey.GetHashCode()
at System.Collections.Generic.Dictionary2.FindValue(TKey key) at System.Collections.Generic.Dictionary2.TryGetValue(TKey key, TValue& value)
at System.Text.Json.JsonClassInfo.InitializeConstructorParameters(ConstructorInfo constructorInfo)
at System.Text.Json.JsonClassInfo..ctor(Type type, JsonSerializerOptions options)
at System.Text.Json.JsonSerializerOptions.GetOrAddClass(Type type)
at System.Text.Json.JsonSerializerOptions.GetOrAddClassForRootType(Type type)
at System.Text.Json.WriteStack.Initialize(Type type, JsonSerializerOptions options, Boolean supportContinuation)
at System.Text.Json.JsonSerializer.WriteAsyncCore[TValue](Stream utf8Json, TValue value, Type inputType, JsonSerializerOptions options, CancellationToken cancellationToken)
at Microsoft.AspNetCore.Mvc.Formatters.SystemTextJsonOutputFormatter.WriteResponseBodyAsync(OutputFormatterWriteContext context, Encoding selectedEncoding)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.g__Awaited|29_0[TFilter,TFilterAsync](ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isComple
ted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Rethrow(ResultExecutedContextSealed context)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.ResultNext[TFilter,TFilterAsync](State& next, Scope& scope, Object& state, Boolean& isCompleted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.InvokeResultFilters()
--- End of stack trace from previous location ---
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.g__Awaited|24_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Rethrow(ResourceExecutedContextSealed context)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.g__Awaited|19_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.g__Awaited|17_0(ResourceInvoker invoker, Task task, IDisposable scope)
at Microsoft.AspNetCore.Routing.EndpointMiddleware.g__AwaitRequestTask|6_0(Endpoint endpoint, Task requestTask, ILogger logger)
at Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.Invoke(HttpContext context)
at Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.Invoke(HttpContext context)
If there's any missing details, please let me know! I've tried to include everything I can think of as relevant.

API ASP.NET 5 "POST" successfully, although with the error "No route matches the supplied values"

Even though it looks like a duplicate question, none of the StackOverflow answers seem to fit or solve my problem.
Basically, I'm making a REST API using ASP.NET 5, with two entities: "Server" and "Video", the entity "Video" being dependent on the entity "Server".
The GET, POST, PUT, DELETE... methods are all working with the "Server" entity; the problem is when I try to use POST on the "Video" entity.
System.InvalidOperationException: No route matches the supplied values.
at Microsoft.AspNetCore.Mvc.CreatedAtActionResult.OnFormatting(ActionContext context)
at Microsoft.AspNetCore.Mvc.Infrastructure.ObjectResultExecutor.ExecuteAsyncCore(ActionContext context, ObjectResult result, Type objectType, Object value)
at Microsoft.AspNetCore.Mvc.Infrastructure.ObjectResultExecutor.ExecuteAsync(ActionContext context, ObjectResult result)
at Microsoft.AspNetCore.Mvc.ObjectResult.ExecuteResultAsync(ActionContext context)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.InvokeResultAsync(IActionResult result)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.ResultNext[TFilter,TFilterAsync](State& next, Scope& scope, Object& state, Boolean& isCompleted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.InvokeNextResultFilterAsync[TFilter,TFilterAsync]()
--- End of stack trace from previous location ---
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Rethrow(ResultExecutedContextSealed context)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.ResultNext[TFilter,TFilterAsync](State& next, Scope& scope, Object& state, Boolean& isCompleted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.InvokeResultFilters()
--- End of stack trace from previous location ---
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeFilterPipelineAsync>g__Awaited|19_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeAsync>g__Awaited|17_0(ResourceInvoker invoker, Task task, IDisposable scope)
at Microsoft.AspNetCore.Routing.EndpointMiddleware.<Invoke>g__AwaitRequestTask|6_0(Endpoint endpoint, Task requestTask, ILogger logger)
at Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.Invoke(HttpContext context)
at Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.Invoke(HttpContext context)
The funny part is that, even though it returns the error, the JSON is being posted successfully when I check with GET.
Here's a chunk of VideosController's code:
namespace SeventhApi.Controllers
{
[Route("api/servers/{serverId}/videos")]
[ApiController]
public class VideosController : ControllerBase
{
private readonly VideoContext _context;
public VideosController(VideoContext context)
{
_context = context;
}
[HttpGet("{id}")]
public async Task<ActionResult<Video>> GetVideo(Guid id)
{
var video = await _context.Videos.FindAsync(id);
if (video == null)
{
return NotFound();
}
return video;
}
[HttpPost]
public async Task<ActionResult<Video>> PostVideo(Video video)
{
_context.Videos.Add(video);
await _context.SaveChangesAsync();
return CreatedAtAction("GetVideo", new { id = video.VideoId }, video);
}
And a chunk o the Startup:
public void ConfigureServices(IServiceCollection services)
{
services.AddControllers();
services.AddDbContext<ServerContext>(opt => opt.UseInMemoryDatabase("Server"));
services.AddDbContext<VideoContext>(opt => opt.UseInMemoryDatabase("Video"));
}
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
app.UseHttpsRedirection();
app.UseRouting();
app.UseAuthorization();
app.UseEndpoints(endpoints =>
{
endpoints.MapControllers();
});
From the answers I've found here, I'm inclined to think it's some routing error, but none of the answers have solved my problem.

url have two parameters, {serverId} {id}.
return CreatedAtAction("GetVideo", new { id = video.VideoId, serverId = 1 }, video);

As Hazrelle replied, it was really a matter of using nameof(GetVideo):
[HttpPost]
[ActionName(nameof(GetVideo))]
public async Task<ActionResult<Video>> PostVideo(Video video)
{
_context.Videos.Add(video);
await _context.SaveChangesAsync();
return CreatedAtAction(nameof(GetVideo), new { id = video.VideoId }, video);
}

How to map JsonPatchDocument using Mapster?

I have my model:
public class Membership
{
[Key]
[Required]
[DatabaseGenerated(DatabaseGeneratedOption.Identity)]
public int Id { get; set; }
[Required]
[MinLength(3)]
[MaxLength(30)]
public string Name { get; set; }
[Required] public int PeriodType { get; set; }
[Required] public int Duration { get; set; }
[Required] public int TerminationPeriod { get; set; }
[Required] public float InstallmentPrice { get; set; }
}
And my Dto:
public class MembershipDto
{
public int Id { get; private set; }
public string Name { get; set; }
public int PeriodType { get; set; }
public int Duration { get; set; }
public int TerminationPeriod { get; set; }
public float InstallmentPrice { get; set; }
}
I'm using Entity Framework and JsonPatchDocument to make PATCH operation in my API, the code is following:
public async Task<MembershipDto> Handle(EditMembershipCommand request, CancellationToken cancellationToken)
{
var membershipEntity = await _dbContext
.Memberships
.SingleOrDefaultAsync(m => m.Id == request.Id);
if (membershipEntity is null)
throw new NullReferenceException($"Membership [Id: {request.Id}] not found");
var editedMembership = request.NewMembershipDto.Adapt<JsonPatchDocument<Membership>>(); //request.NewMembershipDto is type of JsonPatchDocument<MembershipDto>
editedMembership.ApplyTo(membershipEntity, ModelState);
_ = await _dbContext.SaveChangesAsync();
var membershipDto = editedMembership.Adapt<MembershipDto>();
return membershipDto;
}
As an output I get the following information:
ProblemDetails.ProblemDetailsMiddleware[1]
An unhandled exception has occurred while executing the request.
Mapster.CompileException: Error while compiling
source=Microsoft.AspNetCore.JsonPatch.JsonPatchDocument`1[AgreementApi.Dtos.MembershipDto]
destination=Microsoft.AspNetCore.JsonPatch.JsonPatchDocument`1[AgreementApi.Models.Membership]
type=Map
---> Mapster.CompileException: Error while compiling
source=Newtonsoft.Json.Serialization.IContractResolver
destination=Newtonsoft.Json.Serialization.IContractResolver
type=Map
---> System.InvalidOperationException: No default constructor for type 'IContractResolver', please use 'ConstructUsing' or 'MapWith'
at Mapster.Utils.DynamicTypeGenerator.CreateTypeForInterface(Type interfaceType)
at System.Collections.Concurrent.ConcurrentDictionary`2.GetOrAdd(TKey key, Func`2 valueFactory)
at Mapster.Utils.DynamicTypeGenerator.GetTypeForInterface(Type interfaceType)
at Mapster.Adapters.RecordTypeAdapter.CreateInstantiationExpression(Expression source, Expression destination, CompileArgument arg)
at Mapster.Adapters.BaseAdapter.CreateInstantiationExpression(Expression source, CompileArgument arg)
at Mapster.Adapters.RecordTypeAdapter.CreateInlineExpression(Expression source, CompileArgument arg)
at Mapster.Adapters.BaseAdapter.CreateInlineExpressionBody(Expression source, CompileArgument arg)
at Mapster.Adapters.BaseAdapter.CreateExpressionBody(Expression source, Expression destination, CompileArgument arg)
at Mapster.Adapters.BaseAdapter.CreateAdaptFunc(CompileArgument arg)
at Mapster.TypeAdapterConfig.CreateMapExpression(CompileArgument arg)
--- End of inner exception stack trace ---
at Mapster.TypeAdapterConfig.CreateMapExpression(CompileArgument arg)
at Mapster.TypeAdapterConfig.CreateInlineMapExpression(Type sourceType, Type destinationType, MapType mapType, CompileContext context, MemberMapping mapping)
at Mapster.Adapters.BaseAdapter.CreateAdaptExpressionCore(Expression source, Type destinationType, CompileArgument arg, MemberMapping mapping, Expression destination)
at Mapster.Adapters.BaseAdapter.CreateAdaptExpression(Expression source, Type destinationType, CompileArgument arg, MemberMapping mapping, Expression destination)
at Mapster.Adapters.ClassAdapter.CreateInlineExpression(Expression source, CompileArgument arg)
at Mapster.Adapters.BaseAdapter.CreateInlineExpressionBody(Expression source, CompileArgument arg)
at Mapster.Adapters.BaseAdapter.CreateExpressionBody(Expression source, Expression destination, CompileArgument arg)
at Mapster.Adapters.BaseAdapter.CreateAdaptFunc(CompileArgument arg)
at Mapster.TypeAdapterConfig.CreateMapExpression(CompileArgument arg)
--- End of inner exception stack trace ---
at Mapster.TypeAdapterConfig.CreateMapExpression(CompileArgument arg)
at Mapster.TypeAdapterConfig.CreateMapExpression(TypeTuple tuple, MapType mapType)
at Mapster.TypeAdapterConfig.CreateDynamicMapExpression(TypeTuple tuple)
at Mapster.TypeAdapterConfig.<GetDynamicMapFunction>b__66_0[TDestination](TypeTuple tuple)
at Mapster.TypeAdapterConfig.<>c__DisplayClass55_0`1.<AddToHash>b__0(TypeTuple types)
at System.Collections.Concurrent.ConcurrentDictionary`2.GetOrAdd(TKey key, Func`2 valueFactory)
at Mapster.TypeAdapterConfig.AddToHash[T](ConcurrentDictionary`2 hash, TypeTuple key, Func`2 func)
at Mapster.TypeAdapterConfig.GetDynamicMapFunction[TDestination](Type sourceType)
at Mapster.TypeAdapter.Adapt[TDestination](Object source, TypeAdapterConfig config)
at Mapster.TypeAdapter.Adapt[TDestination](Object source)
at Fitverse.AgreementApi.Handlers.EditMembershipHandler.Handle(EditMembershipCommand request, CancellationToken cancellationToken) in /Users/wonsu/Repositories/Fitverse/Fitverse.AgreementApi/Handlers/EditMembershipHandler.cs:line 34
at MediatR.Pipeline.RequestExceptionProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
at MediatR.Pipeline.RequestExceptionProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
at MediatR.Pipeline.RequestExceptionActionProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
at MediatR.Pipeline.RequestExceptionActionProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
at MediatR.Pipeline.RequestPostProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
at MediatR.Pipeline.RequestPreProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
at Fitverse.AgreementApi.Controllers.SettingsController.EditMembership(Int32 id, JsonPatchDocument`1 membershipDto) in /Users/wonsu/Repositories/Fitverse/Fitverse.AgreementApi/Controllers/SettingsController.cs:line 52
at Microsoft.AspNetCore.Mvc.Infrastructure.ActionMethodExecutor.TaskOfIActionResultExecutor.Execute(IActionResultTypeMapper mapper, ObjectMethodExecutor executor, Object controller, Object[] arguments)
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.<InvokeActionMethodAsync>g__Awaited|12_0(ControllerActionInvoker invoker, ValueTask`1 actionResultValueTask)
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.<InvokeNextActionFilterAsync>g__Awaited|10_0(ControllerActionInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Rethrow(ActionExecutedContextSealed context)
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.<InvokeInnerFilterAsync>g__Awaited|13_0(ControllerActionInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeFilterPipelineAsync>g__Awaited|19_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeAsync>g__Awaited|17_0(ResourceInvoker invoker, Task task, IDisposable scope)
at Microsoft.AspNetCore.Routing.EndpointMiddleware.<Invoke>g__AwaitRequestTask|6_0(Endpoint endpoint, Task requestTask, ILogger logger)
at Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.Invoke(HttpContext context)
at Hellang.Middleware.ProblemDetails.ProblemDetailsMiddleware.Invoke(HttpContext context)
I know that the issue is in this line of code:
var editedMembership = request.NewMembershipDto.Adapt<JsonPatchDocument<Membership>>();
But I don't know how to change it to properly map it to desired type. Could you help me? :)
I know that at the end I should probably get the membership from DB again, map it and return it instead of just mapping editedMembership, but I'll fit it after dealing with this mapping issue.

Add the mapping of IContractResolver helps resolve the issue.
private static TypeAdapterConfig GetConfiguredMappingConfig()
{
var config = TypeAdapterConfig.GlobalSettings;
IList<IRegister> registers = config.Scan(Assembly.GetExecutingAssembly());
config.Apply(registers);
config.NewConfig<IContractResolver, IContractResolver>()
.ConstructUsing(src => new DefaultContractResolver());
return config;
}

Getting exception error when adding [FromBody]

I am trying to debug my code but I am getting System.NullReferenceException exception just after adding [frombody] to the parameter but when I removed [frombody] and tried again everything worked normaly
This my controller:
public async Task<IActionResult> Register([FromBody] UserForRegisterDTO userForRegisterDTO)
{
//validate request
userForRegisterDTO.Username = userForRegisterDTO.Username.ToLower();
if(await _repo.UserExist(userForRegisterDTO.Username))
return BadRequest("Username is already taken");
}
DTO :
namespace DatingApp.API.DTO
{
public class UserForRegisterDTO
{
public string Username { get; set; }
public string Password { get; set; }
}
}
Postman :
Error:
fail:
Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware1
An unhandled exception has occurred while executing the request. System.NullReferenceException: Object reference not set to an instance
of an object.
at Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.InvokeNextResourceFilter()
at Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.Rethrow(ResourceExecutedContext context)
at Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)
at Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.InvokeFilterPipelineAsync()
at Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.InvokeAsync()
at Microsoft.AspNetCore.Routing.EndpointMiddleware.Invoke(HttpContext httpContext)
at Microsoft.AspNetCore.Routing.EndpointRoutingMiddleware.Invoke(HttpContext httpContext)
at Microsoft.AspNetCore.Cors.Infrastructure.CorsMiddleware.Invoke(HttpContext context)
at Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.Invoke(HttpContext context)
Solved
Something strange happened. I solved this problem by using "dotnet watch run " instead of "dotnet run "