Autofac.Core.DependencyResolutionException #8789

14 Answer(s)

• 

  0

  berkansasmaz created about a month ago

  Support Team .NET Developer

  Hello Leeneshk,

  If you share your ILearnworldsApiService and LearnworldsApiController constructor dependencies, We can provide more specific guidance.

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• 

  0

  leeneshk created about a month ago

  Hello @berkansasmaz,

  This is my LearnworldsApiService:
  

  This is my ILearnworldsApiService:

  

  And then my LearnworldsApiController:

  

  I have also created .Extended classes for each because I thought it was a standard within abp.io

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• 

  0

  berkansasmaz created about a month ago

  Support Team .NET Developer

  Hi,

  First of all, you don't need to create an extended of each class. This is a feature to allow customization when code is generated with Suite. See more: https://abp.io/docs/latest/suite/customizing-the-generated-code

  Secondly, you don't need to create a controller, ABP creates the controller for you from ApplicationService. But you can still create it if you want to, of course. See more: https://abp.io/docs/latest/framework/api-development/auto-controllers

  In your case, there should be a structure like the one below:

  ILearnworldsApiService:

  public interface ILearnworldsApiService : IApplicationService
  {
    Task<LookupDto<LearnwroldsActivitiesDto>> GetActivitiesBySchoolAsync(Guid tenantId);
  }
  

  LearnworldsApiService:

  public class LearnworldsApiService : MyAppService, ILearnworldsApiService
  {
      private readonly IMyRepository _myRepository;
      private readonly MyLearnManager _myLearnManager;
  
      public AuthorAppService(
          IMyRepository myRepository,
          MyLearnManager myLearnManager)
      {
          _myRepository = myRepository;
          _myLearnManager = myLearnManager;
      }
  
       public async Task> GetActivitiesBySchoolAsync(Guid tenantId)    
       {
           // ....
       }
  }
  

  LearnworldsApiController:

  You don't need it, but if you want to create it, you can create it similar to this one here: https://github.com/abpframework/abp/blob/dev/modules/identity/src/Volo.Abp.Identity.HttpApi/Volo/Abp/Identity/IdentityUserController.cs

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• 

  0

  leeneshk created about a month ago

  Hi,

  First of all, you don't need to create an extended of each class. This is a feature to allow customization when code is generated with Suite. See more: https://abp.io/docs/latest/suite/customizing-the-generated-code

  Secondly, you don't need to create a controller, ABP creates the controller for you from ApplicationService. But you can still create it if you want to, of course. See more: https://abp.io/docs/latest/framework/api-development/auto-controllers

  In your case, there should be a structure like the one below:

  ILearnworldsApiService:

  public interface ILearnworldsApiService : IApplicationService 
  { 
    Task<LookupDto<LearnwroldsActivitiesDto>> GetActivitiesBySchoolAsync(Guid tenantId); 
  } 
  

  LearnworldsApiService:

  public class LearnworldsApiService : MyAppService, ILearnworldsApiService 
  { 
      private readonly IMyRepository _myRepository; 
      private readonly MyLearnManager _myLearnManager; 
   
      public AuthorAppService( 
          IMyRepository myRepository, 
          MyLearnManager myLearnManager) 
      { 
          _myRepository = myRepository; 
          _myLearnManager = myLearnManager; 
      } 
   
       public async Task> GetActivitiesBySchoolAsync(Guid tenantId)     
       { 
           // .... 
       } 
  } 
  

  LearnworldsApiController:

  You don't need it, but if you want to create it, you can create it similar to this one here: https://github.com/abpframework/abp/blob/dev/modules/identity/src/Volo.Abp.Identity.HttpApi/Volo/Abp/Identity/IdentityUserController.cs

  Thank you for the response, I appreciate it,

  So question though, I need to use the APIService and bind it to another Controller/action, which will populate a dropdown, I initially also tried injecting the service yet still got the dependency injection exception. Also the manager class, do I need that? I have not created a LearnworldsApiManager class though

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• 

  0

  berkansasmaz created about a month ago

  Support Team .NET Developer

  So question though, I need to use the APIService and bind it to another Controller/action, which will populate a dropdown, I initially also tried injecting the service yet still got the dependency injection exception.

  Do not inject a controller into an ApplicationService, instead inject the corresponding repository service directly, or worst case inject the corresponding AppService.

  Also the manager class, do I need that? I have not created a LearnworldsApiManager class though

  This is completely up to your domain. Creating a Domain Service is especially needed when;

  • You implement a core domain logic that depends on some services (like repositories or other external services).

  • The logic you need to implement is related to more than one aggregate/entity, so it doesn't properly fit in any of the aggregates.

  See more: https://abp.io/docs/latest/framework/architecture/domain-driven-design/domain-services

  Note: If you feel unfamiliar with this, don't worry. Once you complete the BookStore tutorial, you will be much more familiar with these topics.

  ---

  In this project, information about Author is also shown in Book UI. You can examine BookAppService to see what is done for this:

  https://github.com/abpframework/abp-samples/blob/f34c5797fedc84445d2db403b9d7248f620f2ed4/BookStore-Angular-MongoDb/aspnet-core/src/Acme.BookStore.Application/Books/BookAppService.cs#L25

  If you want to know more about this, I recommend you to follow our BookStore tutorial. See: https://abp.io/docs/latest/tutorials/book-store?UI=NG&DB=EF

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• 

  0

  leeneshk created about a month ago

  Thank you very much for the help @berkansasmaz

  I will utilize the feedback provided and get things working again :)

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  1
• 

  0

  leeneshk created about a month ago

  Hello @berkansasmaz

  I am not getting any luck, still getting the dependency injection errors, even after using the above,

  Could I perhaps have a call with you on this?

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• 

  0

  berkansasmaz created about a month ago

  Support Team .NET Developer

  Hello,

  If it is appropriate, you can send your sample application to support@abp.io with a text like below:

  Please forward my mail to Berkan Sasmaz regarding ticket #8789.

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• 

  0

  leeneshk created about a month ago

  Hello,

  If it is appropriate, you can send your sample application to support@abp.io with a text like below:

  Please forward my mail to Berkan Sasmaz regarding ticket #8789.

  Hi Berkan,

  Uhm so I have quite a few dependent components which would cause errors, is that fine still?

  I would prefer if we could have a call via Zoom or Microsoft teams so that I can take you through everything where the error points are.

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• 

  0

  berkansasmaz created about a month ago

  Support Team .NET Developer

  If you are available, we can talk right now through this link: https://us04web.zoom.us/j/73615342418?pwd=QIVbN3sQWP4lZ324DtruyDEZkfDvXA.1

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• 

  0

  leeneshk created about a month ago

  Thank you so much, I am joining now

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• 

  0

  berkansasmaz created about a month ago

  Support Team .NET Developer

  The document mentioned during the meeting: https://abp.io/docs/latest/framework/architecture/multi-tenancy#change-the-current-tenant

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• 

  0

  leeneshk created about a month ago

  The document mentioned during the meeting: https://abp.io/docs/latest/framework/architecture/multi-tenancy#change-the-current-tenant

  Thank you very much for your time Berkan,

  I appreciate it, I will keep you posted on the progress, take care

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  1
• 

  0

  berkansasmaz created about a month ago

  Support Team .NET Developer

  Thank you too :)

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