Setting custom mapper not working.

[oslboreal]

I've been trying to use a custom mapper for my domain entities, I have two different projects, one for domain entities called "Domain" and the last one "Infrastructure" in wich I have my repositories.

Infrastructure has his own DependencyInjection class wich is called in my application Startup.cs file.

I've created a mapper class following the instructions I've found in the documentation.

Then I have defined my Domain entity, called User. (Inside my domain project)

Then I use DapperExtensions inside my repository

But It thrown an exception because the library did'nt find the table "User". So, the library is not applying the configuration I supplied on the startup.

Thank you.

[oslboreal]

Maybe the problem could be that I'm not having POCO classes in the same project I installed DapperExtensions. Is there a way to solve that?

Note: I'm not able to edit the database scheme 👎 I'm dealing with a preexistent database (that really sucks).

Thank you a lot again!

[ALMMa]

Quick questions:

1. Have you tried to set a custom map for that POCO specifically (eg: ClassMap<User>)?
2. I'm not sure if Dapper will pick up mappings from the current assembly or not (never even tried, I always have them on a separate assembly). Have you also tried DapperExtensions.DapperExtensions.SetMappingAssemblies([...]);?

[oslboreal]

Yes I tried, but it is still not working. Do you have a repository with your implementation? Maybe I could figure out what's wrong with my code. Anyway I tried A LOT. Thank you!

[ALMMa]

I don't, sorry. I only have internal repos.

For me the structure is as follows:

src/Runner (This is a Desktop executable with Winforms)
src/Web (The web side of the app)
data/Poco
data/Poco.Mappings

On the Web project (MVC) I have, on the ctor of Startup:

var assemblies = new[]
{
   typeof(SomePoco_Mapper).Assembly
};

DapperExtensions.DapperExtensions.SetMappingAssemblies(assemblies);

And on this example, SomePoco_Mapper would be:

public class SomePoco_Mapper : ClassMapper<SomePoco>
{
   //...
}

Nothing else. That also works for desktop. On the Program.cs of the Runner I have the same configuration.

Everything just works there.

Dapper: 2.0.123 DapperExtensions: 1.7.0

[valfrid-ly]

I never used the way you're trying to use.

Did you try to put this in your startup.cs

services.AddAutoMapper(typeof(Startup));

You'll need to add AutoMapper package

[PonyoLoveCode]

Here's how I handled it： Because it has synchronous and asynchronous，so you have to set both. DapperExtensions.DapperExtensions.DefaultMapper = typeof(BetaDapperMapper<>); DapperExtensions.DapperExtensions.SetMappingAssemblies(new List<Assembly>(){typeof(BetaDapperMapper<>).Assembly}); DapperExtensions.DapperAsyncExtensions.DefaultMapper = typeof(BetaDapperMapper<>); DapperExtensions.DapperAsyncExtensions.SetMappingAssemblies(new List<Assembly>() { typeof(BetaDapperMapper<>).Assembly });

I want to use System.ComponentModel.DataAnnotations [table()] [column()] [notmapped()]

[valfrid-ly]

If you are using both, Sync and Async you may set them both. True.