Configuring AutoMapper Maps for Dynamic/Expando Object

Question

I'm using AutoMapper to map ExpandoObjects to an Entity and want to configure some rules for the mappings, specifically, I don't want to map to any property that inherits from Entity; I tried to set Ignore on those properties, but it never executes for the top level object, I hit the break point for the properties of the Entity that inherit from Entity string => Entity, but never for ExpandoObject => Entity.

Startup.cs

public IServiceProvider ConfigureServices(IServiceCollection services)
{
  services.AddAutoMapper(config =>
  {
    config.ForAllMaps((cfg, expr) =>
    {
      if (typeof(Entity).IsAssignableFrom(cfg.DestinationType))
      {
        var properties = cfg.DestinationType.GetProperties()
            .Where(prop => typeof(Entity).IsAssignableFrom(prop.PropertyType));

        foreach (var prop in properties)
        {
          expr.ForMember(prop.Name, opt => opt.Ignore());
        }
      }
    });

    config.CreateMissingTypeMaps = true;
    config.ValidateInlineMaps = false;
  });

I found some code that works, but I was hoping to find a way to do it that wasn't global.

.AddAutoMapper(config =>
{
  config.ShouldMapProperty = pi => !typeof(Entity).IsAssignableFrom(pi.PropertyType);

  config.CreateMissingTypeMaps = true;
  config.ValidateInlineMaps = false;
});

Is there a way to configure maps for ExpandoObjects? The documentation shows how to map them, but it doesn't have any information on configuring the maps for them...

Answer 1

No, mapping from ExpandoObject is built in and doesn't work like a regular map you create yourself. And there is no way to configure it. Here is the code.