Getting Ambiguous match found exception while calling DeleteAsync

问题

I have a table which has code as primary key instead of Id, When I call DeleteAsync method I get the exception Ambiguous match found.

[Table("Test")]

public class Test: FullAuditedEntity<int>

{

[DatabaseGenerated(DatabaseGeneratedOption.Identity)]
new public int Id { get; set; }
[Key]
[DatabaseGenerated(DatabaseGeneratedOption.None)]
public virtual int Code { get; set; }

_testRepository.DeleteAsync(code);

StackTrace:

   at System.RuntimeType.GetPropertyImpl(String name, BindingFlags 
bindingAttr, Binder binder, Type returnType, Type[] types, ParameterModifier[] modifiers)
   at System.Type.GetProperty(String name, BindingFlags bindingAttr)
   at System.Reflection.TypeExtensions.GetProperty(Type type, String name, BindingFlags bindingAttr)
   at System.Linq.Expressions.Expression.PropertyOrField(Expression expression, String propertyOrFieldName)
   at Abp.Domain.Repositories.AbpRepositoryBase`2.CreateEqualityExpressionForId(TPrimaryKey id) in D:\Github\aspnetboilerplate\src\Abp\Domain\Repositories\AbpRepositoryBase.cs:line 310
   at Abp.Domain.Repositories.AbpRepositoryBase`2.FirstOrDefault(TPrimaryKey id) in D:\Github\aspnetboilerplate\src\Abp\Domain\Repositories\AbpRepositoryBase.cs:line 108
   at Abp.EntityFrameworkCore.Repositories.EfCoreRepositoryBase`3.Delete(TPrimaryKey id) in D:\Github\aspnetboilerplate\src\Abp.EntityFrameworkCore\EntityFrameworkCore\Repositories\EfCoreRepositoryBaseOfTEntityAndTPrimaryKey.cs:line 216
   at Abp.Domain.Repositories.AbpRepositoryBase`2.DeleteAsync(TPrimaryKey id) in D:\Github\aspnetboilerplate\src\Abp\Domain\Repositories\AbpRepositoryBase.cs:line 206
   at Castle.Proxies.Invocations.IRepository`2_DeleteAsync_58.InvokeMethodOnTarget()
   at Castle.DynamicProxy.AbstractInvocation.Proceed()
   at Abp.Domain.Uow.UnitOfWorkInterceptor.PerformAsyncUow(IInvocation invocation, UnitOfWorkOptions options) in D:\Github\aspnetboilerplate\src\Abp\Domain\Uow\UnitOfWorkInterceptor.cs:line 83
   at Castle.DynamicProxy.AbstractInvocation.Proceed()
   at Castle.Proxies.IRepository`2Proxy_16.DeleteAsync(Int32 id)
   at Nec.Stanchion.Business.Services.Suppliers.SupplierAppService.<DeleteSupplier>d__3.MoveNext() in C:\Users\viveknuna\source\repos\Stanchion\aspnet-core\src\Nec.Stanchion.Business.Services\Suppliers\SupplierAppService.cs:line 53

回答1:

Ambiguous match found is likely caused by property hiding of Id in Entity Framework. FullAuditedEntity<int> already defined Id identically to what you do, so you can remove that.

On another note, _testRepository.DeleteAsync(code) deletes by comparing the Id. To delete by code, do _testRepository.DeleteAsync(test => test.Code == code);

来源：https://stackoverflow.com/questions/46155968/getting-ambiguous-match-found-exception-while-calling-deleteasync

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