- ABP Framework version: v4.3.0
- UI type: Angular
- DB provider: EF Core
- Tiered (MVC) or Identity Server Separated (Angular): yes
- Exception message and stack trace:
- Steps to reproduce the issue:
Hi,
I've a validator class which inherits FluentValidaton's abstract class described as AbstractValidator<T>. I inject IRepository<MyEntity> within the constructor. Then I use this repository in a private method of my validator. Before 4.3.0 upgrade this code works fine. But after the upgrade it throws an exception that says "Cannot access a disposed context instance...". And also if I inject IUnitOfWorkManager and start a new unit of work by using scope, my code works fine again. What is the problem that lies behind, any ideas?
public class MyDtoValidator : AbstractValidator<MyDto>
{
private readonly IRepository<MyEntity, long> _repository;
private readonly IUnitOfWorkManager _unitOfWorkManager;
public MyDtoValidator(IRepository<MyEntity, long> repository,
IUnitOfWorkManager unitOfWorkManager)
{
_repository = repository;
_unitOfWorkManager = unitOfWorkManager;
RuleFor(cf => cf.Property).NotEmpty().MustAsync((dto, key, cancellationToken) => MyAsyncMethod(dto)).WithMessage((dto, field) =>
{
return "message";
}); ;
}
private async Task<bool> MyAsyncMethod(MyDto dto)
{
using (var uow = _unitOfWorkManager.Begin(true)) // without this line, it crashes.
{
var query = await _repository.GetQueryableAsync();
query = query.Where(x => x.Property == dto.Property);
var existingDto = await _repository.AsyncExecuter.FirstOrDefaultAsync(query);
return !(existingDto != null && dto.Id != existingDto.Id);
}
}
}
Thanks for your attention.
2 Answer(s)
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0
hi ]Can you share the error stack?
using (var uow = _unitOfWorkManager.Begin(true))
This is recommend way, because you can't assume there is uow.
var query = await _repository.GetQueryableAsync();
The method will start a new uow and then the dbcontext will be disposed.
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0
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