PetaPoco SQL Date to C# DateOnly mapping

public class CustomMapper : ConventionMapper
{
	private static readonly Type DateOnlyType = typeof(DateOnly);
	private static readonly Type DateTimeType = typeof(DateTime);
	
	public override Func<object, object> GetFromDbConverter(PropertyInfo targetProperty, Type sourceType)
	{
		// see if there's already a converter on the class/property
		var result = base.GetFromDbConverter(targetProperty, sourceType);
        
		if (result == null 
			&& targetProperty.PropertyType == DateOnlyType
			&& sourceType == DateTimeType)
		{            
            
			return o => DateOnly.FromDateTime((DateTime)o);
		}
		return result;
	}
	
	public override Func<object, object> GetToDbConverter(PropertyInfo sourceProperty)
	{
		// see if there's already a converter on the class/property
		var result = base.GetToDbConverter(sourceProperty);
        
		if (result == null 
			&& sourceProperty.PropertyType == DateOnlyType)
		{

			return o => ((DateOnly)o).ToDateTime(TimeOnly.MinValue);
		}
		return result;
	}
}

		var dbConfig = DatabaseConfiguration
				.Build()
				.UsingConnectionString(Environment.GetEnvironmentVariable("DbConnection"))
				.UsingDefaultMapper(new CustomMapper())
				.UsingProvider<SqlServerDatabaseProvider>()
                ;