I made a test with code below to update the Product
:
var existing = await _productRepository.FirstOrDefaultAsync(c => c.Id == input.Id);
if (existing == null)
throw new UserFriendlyException(L("ProductNotExist"));
var updatedEntity = ObjectMapper.Map<Product>(input);
var entity = await _productRepository.UpdateAsync(updatedEntity);
But it throws an exception:
Mvc.ExceptionHandling.AbpExceptionFilter - The instance of entity type 'Product' cannot be tracked because another instance with the same key value for {'Id'} is already being tracked. When attaching existing entities, ensure that only one entity instance with a given key value is attached.
This is caused by querying existing
. Is there any solution for this?
Since you are not using the existing
entity, don't load it.
Use AnyAsync
to check if it exists:
var exists = await _productRepository.GetAll().AnyAsync(c => c.Id == input.Id); // Change
if (!exists) // this
throw new UserFriendlyException(L("ProductNotExist"));
var updatedEntity = ObjectMapper.Map<Product>(input);
var entity = await _productRepository.UpdateAsync(updatedEntity);
If you want to map to the existing
entity:
var existing = await _productRepository.FirstOrDefaultAsync(c => c.Id == input.Id);
if (existing == null)
throw new UserFriendlyException(L("ProductNotExist"));
var updatedEntity = ObjectMapper.Map(input, existing); // Change this