Mapster.EF6 plugin .BuildAdapter exception

[ktodyruik]

Hi,

I'm new to trying Mapster with EF6 and for select queries it has been great. I'm trying it out with updates and this seems like it should be pretty straightforward. I was hoping to be able to update my root entity fields without re-mapping the child collection which caused unnecessary inserts. I installed Mapster.EF6 2.0.0, followed the examples on the Wiki page.

var userEntity = db.Users.Where(x => x.UserID == userToSave.UserID).FirstOrDefault();
userToSave
    .BuildAdapter(config)
    .EntityFromContext(db);

For clarity I removed .AdaptTo(userEntity) because it wasn't getting there.

Throws the exception:

System.InvalidOperationException
Sequence contains no matching element
   at System.Linq.Enumerable.First[TSource](IEnumerable`1 source, Func`2 predicate)
   at Mapster.TypeAdapterBuilderExtensions.<>c__DisplayClass0_0`1.<EntityFromContext>b__0(TypeAdapterConfig config)
   at Mapster.TypeAdapterConfig.<>c__DisplayClass99_0.<Fork>b__0(String _)
   at System.Collections.Concurrent.ConcurrentDictionary`2.GetOrAdd(TKey key, Func`2 valueFactory)
   at Mapster.TypeAdapterConfig.Fork(Action`1 action, String key1, Int32 key2)
   at Mapster.TypeAdapterBuilder`1.ForkConfig(Action`1 action, String key1, Int32 key2)
   at <snip>Repositories.UserRepository.SaveUpdateUser(Int32 updatingUserId, User userToSave) in <snip> Repositories\UserRepository.cs:line 198
<snip> at UnitTests.Repositories.UserRepositoryTest.UpdateUserDetails() in <snip>\Repositories\UserRepositoryTest.cs:line 364

Would appreciate any suggestions.

Thanks, Kerry