Does this work with `AutoMapper.Extensions.Microsoft.DependencyInjection`?

Hi Jimmy,

Is there a way to setup the GenerateEntityFrameworkCorePrimaryKeyPropertyMaps when using AutoMapper.Extensions.Microsoft.DependencyInjection? From what I can see, GenerateEntityFrameworkCorePrimaryKeyPropertyMaps needs an IServiceProvider, which is not available in ConfigureServices without registering the service using the implementation factory overload of one of the Add calls on IServiceCollection.

Ideally, I would like to be able to do something along the lines of:

services.AddAutoMapper(mapper =>
{
	mapper.AddCollectionMappers();
	mapper.SetGeneratePropertyMaps<GenerateEntityFrameworkCorePrimaryKeyPropertyMaps<MyContext>>();
});

but there appears to be a chicken and egg problem here. From what I can tell, SetGeneratePropertyMaps immediately creates an instance of the property map generator and attempts to build the mappings rather than doing it after the container has been built or when IMapper is resolved.

Thanks! 😃

[Tasteful]

One option is to pass the IServiceProvider when the AddAutoMapper is building it’s config.

If we add an overload to the existing

public static IServiceCollection AddAutoMapper(this IServiceCollection services, Action<IMapperConfigurationExpression> additionalInitAction)

that also will send in the IServiceProvider in the config method like this

public static IServiceCollection AddAutoMapper(this IServiceCollection services, Action<IServiceProvider, IMapperConfigurationExpression> additionalInitAction)

then we will have the IServiceProvider directly and can use that when register the EFCore mappings direcly

services.AddAutoMapper((serviceProvider, cfg) => {
    cfg.AddCollectionMappers();
    cfg.SetGeneratePropertyMaps<GenerateEntityFrameworkCorePrimaryKeyPropertyMaps<MyContext>>(serviceProvider);
});

MS is doing this for configuring EFCore itself https://github.com/aspnet/EntityFrameworkCore/blob/c07c2cef92a30e1f8272db0395756e836e47d864/src/EFCore/EntityFrameworkServiceCollectionExtensions.cs#L216

[replaysMike]

I see, the error is confusing but it should be replaced with:

cfg.UseEntityFrameworkCoreModel<MyDbContext>(services);

instead of:

cfg.SetGeneratePropertyMaps<GenerateEntityFrameworkCorePrimaryKeyPropertyMaps<MyDbContext>>();