Hello Team
It could be very basic question but i have stuck with this
I have an Entity Structure like this one below
public class OrderTagGroup : Entity
{
public virtual string Name { get; set; }
public virtual List<OrderTag> OrderTags { get; set; }
}
public class OrderTag : Entity
{
public virtual string Name { get; set; }
public virtual int? OrderTagGroupId { get; set; }
}
and Its respective DTO is
public class OrderTagGroupDto : EntityDto
{
[Required]
public string Name { get; set; }
public List<OrderTagDto> OrderTags { get; set; }
}
public class OrderTagDto : EntityDto
{
[Required]
public string Name { get; set; }
public int? OrderTagGroupId { get; set; }
}
I have added the Auto mapping as well like this
Mapper.CreateMap<OrderTagGroup, OrderTagGroupDto>();
Mapper.CreateMap<OrderTagGroupDto, OrderTagGroup>();
Mapper.CreateMap<OrderTag, OrderTagDto>();
Mapper.CreateMap<OrderTagDto, OrderTag>();
Here is my Repository update
public void UpdateOrderTagGroup(OrderTagGroupDto OrderTagGroup)
{
var group = _OrderTagGroupRepo.Get(OrderTagGroup.Id);
if (group != null && group.Id > 0)
{
Mapper.Map<OrderTagGroupDto, OrderTagGroup>(OrderTagGroup,group);
}
}
My Question is, whenever my OrderTagGroupDTO goes for the update, it creates a new row in the DB and previous entry is not deleted.
Could you please help me where i am wrong ?
6 Answer(s)
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0
This is not AutoMapper related problem. It's related to EF actually. You can not update a collection by another collection. When you do it, EF thinks they are all new entities. It's a bit complicated, but just do not update collection and make it in a loop. find new added, updated and deleteds and use repository to handle it yourself. At least, that's what I do and know. If anybody knows it better, I want also to learn it :)
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0
Thank you so much for the reply
Do we have any sample code in any of the Repository ?
It would be really helpful
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0
Getting an error on following code:
public GetEmployeesOutput GetEmployee(GetEmployeesInput input) { var userinfo = _userRepository.GetAll().Where(m => m.EmailID == input.Email&&m.Password==input.Password).FirstOrDefault(); var user = _employeeRepository.GetAll().Where(m => m.UserId == userinfo.Id).ToList(); return new GetEmployeesOutput { Employee = Mapper.Map<List<EmployeeDto>>(user) }; }error is:
An exception of type 'AutoMapper.AutoMapperMappingException' occurred in AutoMapper.dll but was not handled in user code this exception take place in **return new GetEmployeesOutput { Employee = Mapper.Map<List<EmployeeDto>>(user) };** -
0
please reply ...
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0
@Abu, have you defined mapping between EmployeeDto and Employee? Also, you should see inner exception for more information.
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0
yes sir i define mapping in all dtos this problem is resolve because i am fetching a single record and mapping is done with list<employee> . i removed the return type of the employee it works. thank you sir for your kind attention
