CODEWITHSUNDEEP
automapper
Mao
Mao

Reputation: 41

Automapper 5.0.2 - Missing type map configuration or unsupported mapping

I've read all I could find online about this issue but nothing is helping. Here is my code: 

 Mapper.Initialize(cfg =>
        {
            cfg.CreateMap<User, UserListViewModel>()
            .ForMember("RoleNames", c => c.Ignore())
            .ForMember("CostCentreNames", c => c.Ignore())
            .ForMember("RollupGroupNames", c => c.Ignore())
            .ForMember(c => c.CostCentres, m => m.MapFrom(d => d.DetailCostCentres))
            ;
        });

        Mapper.Initialize(cfg =>
        {
            cfg.CreateMap<CostCentre, CostCentreListViewModel>();

        });

var users = _repo.AllIncluding(u => u.Roles, u=>u.CostCentres).OrderBy(u => u.UserName).ToList();
var  model = Mapper.Map<List<User>, List<UserListViewModel>>(users);

Mapper.Map is giving me the error:

Missing type map configuration or unsupported mapping.

Mapping types:
User -> UserListViewModel
Model.Models.User -> Model.ViewModels.UserListViewModel
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: AutoMapper.AutoMapperMappingException: Missing type map configuration or unsupported mapping.

Mapping types:
User -> UserListViewModel
Model.Models.User -> Model.ViewModels.UserListViewModel

Source Error:

Line 45:
Line 46: var users = _repo.AllIncluding(u => u.Roles, u=>u.CostCentres).OrderBy(u => u.UserName).ToList();
Line 47: var model = Mapper.Map, List>(users);
Line 48: return model;
Line 49: }

Upvotes: 4

Views: 2019

Answers (2)

Mao
Mao

Reputation: 41

Thanks for your reply. I actually figured that one out but, it did not solve my issue. I upgraded Automapper v 2 to v5 and it needed some code modifications to work. in my case, it couldn't automatically handle the collections inside the object. I had to add a line of code to specify that:

Mapper.Initialize(cfg =>
        {
            cfg.CreateMap<User, UserListViewModel>()
            .ForMember("RoleNames", c => c.Ignore())
            .ForMember("CostCentreNames", c => c.Ignore())
            .ForMember("RollupGroupNames", c => c.Ignore())
            .ForMember(c => c.CostCentres, m => m.MapFrom(d => d.DetailCostCentres));
            cfg.CreateMap(typeof(Role), typeof(RoleViewModel));
            cfg.CreateMap(typeof(CostCentre), typeof(CostCentreListViewModel));
        });

Upvotes: 0

Gert Arnold
Gert Arnold

Reputation: 109080

You can do only one Mapper.Initialize call:

 Mapper.Initialize(cfg =>
        {
            cfg.CreateMap<User, UserListViewModel>()
            .ForMember("RoleNames", c => c.Ignore())
            .ForMember("CostCentreNames", c => c.Ignore())
            .ForMember("RollupGroupNames", c => c.Ignore())
            .ForMember(c => c.CostCentres, m => m.MapFrom(d => d.DetailCostCentres));
            cfg.CreateMap<CostCentre, CostCentreListViewModel>();
        });

Upvotes: 5

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