Using Mapster w/DI where should I be putting my mapping?

Question

Using Mapster with the Mapster DI package I also have a static class called MapperConfig that has a static method that does all my dto to viewmodel mapping.

 public static class MapperConfig
{
 public static void Config()
 {
   var tenantId = MapContext.Current.GetService<IConfiguration>().GetSection("MySettings").GetValue<int>("DefaultTenantId");
   _ = TypeAdapterConfig<CountyDetail, CountyVM>.NewConfig()
            .Map(d => d.Phone.Number, s => string.Format("{0:(###) ###-####}", Convert.ToInt64(s.Phone.Number)))               
            .Map(d => d.Postal, s => s.Postal.Trim())
            .IgnoreNullValues(true);
  }
}

In the past I would call this in the ConfigureServices section of the startup class. Now I am trying to use DI with to pass some configuration values into the MapperConfig file so I have created an extension method:

  public static IServiceCollection AddMapster(this IServiceCollection services, Action<TypeAdapterConfig> options = null)
    {
        var config = TypeAdapterConfig.GlobalSettings;
        config.Scan(Assembly.GetAssembly(typeof(Startup)));
        options?.Invoke(config);
        services.AddSingleton(config);
        services.AddScoped<IMapper, ServiceMapper>();
        return services;
    }

And then added that to my ConfigureServices section of the Startup class

  services.AddMapster(options =>
        {
            TypeAdapterConfig.GlobalSettings.Default.IgnoreNullValues(true);
        });

Now if I leave the call to MapperConfig.Config in the Startup.ConfigureServices method Iget an error "Mapping must be called using ServiceAdapter".

Not sure how/where that would be done..

score 0 · Accepted Answer · edited Feb 14 '22 at 14:54

0

The line tenantId needed to move into mapping configuration.

var tenantId = MapContext.Current.GetService<IConfiguration>().GetSection("MySettings").GetValue<int>("DefaultTenantId");

For example,

TypeAdapterConfig<CountyDetail, CountyVM>.NewConfig()
     .Map(d => d.TanentId, 
          s => MapContext.Current.GetService<IConfiguration>().GetSection("MySettings").GetValue<int>("DefaultTenantId"));

edited Feb 14 '22 at 14:54

lopezbertoni

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answered May 08 '20 at 01:07

Chaowlert Chaisrichalermpol

5,272
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I don't see GetService method available in MapContext. Is it an extension method perhaps that I cannot find? – papadi Apr 20 '23 at 09:57
Found it. I had to reference Mapster.DependencyInjection. – papadi Apr 20 '23 at 10:01

score 0 · Answer 2 · answered Oct 26 '22 at 06:13

Put all of your custom mapping to TypeAdapterConfig, and register TypeAdapterConfig.GlobalSetting as singleton.

services.AddSingleton(TypeAdapterConfig.GlobalSettings);
services.AddScoped<IMapper, ServiceMapper>();

Next, Register ServiceMapper to IMapper. Then you can inject IMapper to your constructor which need it.

public class SampleService 
{
    private readonly IMapper _mapper;
    public SampleService(IMapper mapper) {
        _mapper = mapper;
    }
}

Using Mapster w/DI where should I be putting my mapping?

2 Answers2