c# - Automapper question : Recursive Projection LinqToSql Stackoverflow Exception - débordement de pile

Using the above LinqToSql entity classes and trying to map to like-named DTO objects throws a Stackoverflow Exception. I've read around and this appears to be a problem with the Child/Parent relationship with the CriteriaGroup object. Does anyone have any suggestions?

Code used to call this:

var mappedDtos = this.configurationRepository
                        .GetAll()
                        .Project()
                        .To<CriteriaGroupDto>();

Where GetAll() is:

    public override IQueryable<TEntity> GetAll()
    {
        return this.Table.AsQueryable();
    }

The mapping code I've made for this is:

/// <summary>
    /// The criteria profile.
    /// </summary>
    public class CriteriaProfile : Profile
    {
        /// <summary>
        /// The configure.
        /// </summary>
        protected override void Configure()
        {
            Mapper.CreateMap<CriteriaGroup, CriteriaGroupDto>()
                 .ForMember(dest => dest.Groups, opt => opt.MapFrom(src => src.Children))
                 .ForMember(dest => dest.Parent, opt => opt.MapFrom(src => src.Parent))
                 .ForMember(dest => dest.Criteria, opt => opt.MapFrom(src => src.CriteriaConfigs));

            Mapper.CreateMap<CriteriaConfig, CriteriaConfigDto>()
                .Include<RatingConfig, CriteriaConfigDto>()
                .Include<CountryConfig, CriteriaConfigDto>()
                .Include<TimescaleConfig, CriteriaConfigDto>()
                .ForMember(dest => dest.DefaultValue, opt => opt.UseValue(default(object)))
                .ForMember(dest => dest.DataType, opt => opt.Ignore())
                .ForMember(dest => dest.ElementId, opt => opt.MapFrom(src => src.Id))
                .ForMember(dest => dest.Options, opt => opt.Ignore());

            Mapper.CreateMap<RatingConfig, CriteriaConfigDto>()
                .ForMember(dest => dest.JoinOperators, opt => opt.MapFrom(src => src.JoinOperators))
                .ForMember(dest => dest.OptionOperators, opt => opt.MapFrom(src => src.Operators));

            Mapper.CreateMap<CountryConfig, CriteriaConfigDto>()
                .ForMember(dest => dest.JoinOperators, opt => opt.MapFrom(src => src.JoinOperators))
                .ForMember(dest => dest.OptionOperators, opt => opt.MapFrom(src => src.Operators));

            Mapper.CreateMap<TimescaleConfig, CriteriaConfigDto>()
                .ForMember(dest => dest.JoinOperators, opt => opt.MapFrom(src => src.JoinOperators))
                .ForMember(dest => dest.OptionOperators, opt => opt.MapFrom(src => src.Operators));

            base.Configure();
        }
    }

Whereby the additional mappings in the derrived classes are due to: (EG)

/// <summary>
    /// The rating config.
    /// </summary>
    public partial class RatingConfig
    {
        /// <summary>
        /// Gets the operators.
        /// </summary>
        public IEnumerable<RatingOperator> Operators
        {
            get
            {
                return Enumeration.GetAll<RatingOperator>();
            }
        }

        /// <summary>
        /// Gets the join operators.
        /// </summary>
        public IEnumerable<RuleJoinOperator> JoinOperators
        {
            get
            {
                return Enumeration.GetAll<RuleJoinOperator>();
            }
        }
    }

Using the above LinqToSql entity classes and trying to map to like-named DTO objects throws a Stackoverflow Exception. I've read around and this appears to be a problem with the Child/Parent relationship with the CriteriaGroup object. Does anyone have any suggestions?

Code used to call this:

var mappedDtos = this.configurationRepository
                        .GetAll()
                        .Project()
                        .To<CriteriaGroupDto>();

Where GetAll() is:

    public override IQueryable<TEntity> GetAll()
    {
        return this.Table.AsQueryable();
    }

The mapping code I've made for this is:

/// <summary>
    /// The criteria profile.
    /// </summary>
    public class CriteriaProfile : Profile
    {
        /// <summary>
        /// The configure.
        /// </summary>
        protected override void Configure()
        {
            Mapper.CreateMap<CriteriaGroup, CriteriaGroupDto>()
                 .ForMember(dest => dest.Groups, opt => opt.MapFrom(src => src.Children))
                 .ForMember(dest => dest.Parent, opt => opt.MapFrom(src => src.Parent))
                 .ForMember(dest => dest.Criteria, opt => opt.MapFrom(src => src.CriteriaConfigs));

            Mapper.CreateMap<CriteriaConfig, CriteriaConfigDto>()
                .Include<RatingConfig, CriteriaConfigDto>()
                .Include<CountryConfig, CriteriaConfigDto>()
                .Include<TimescaleConfig, CriteriaConfigDto>()
                .ForMember(dest => dest.DefaultValue, opt => opt.UseValue(default(object)))
                .ForMember(dest => dest.DataType, opt => opt.Ignore())
                .ForMember(dest => dest.ElementId, opt => opt.MapFrom(src => src.Id))
                .ForMember(dest => dest.Options, opt => opt.Ignore());

            Mapper.CreateMap<RatingConfig, CriteriaConfigDto>()
                .ForMember(dest => dest.JoinOperators, opt => opt.MapFrom(src => src.JoinOperators))
                .ForMember(dest => dest.OptionOperators, opt => opt.MapFrom(src => src.Operators));

            Mapper.CreateMap<CountryConfig, CriteriaConfigDto>()
                .ForMember(dest => dest.JoinOperators, opt => opt.MapFrom(src => src.JoinOperators))
                .ForMember(dest => dest.OptionOperators, opt => opt.MapFrom(src => src.Operators));

            Mapper.CreateMap<TimescaleConfig, CriteriaConfigDto>()
                .ForMember(dest => dest.JoinOperators, opt => opt.MapFrom(src => src.JoinOperators))
                .ForMember(dest => dest.OptionOperators, opt => opt.MapFrom(src => src.Operators));

            base.Configure();
        }
    }

Whereby the additional mappings in the derrived classes are due to: (EG)

/// <summary>
    /// The rating config.
    /// </summary>
    public partial class RatingConfig
    {
        /// <summary>
        /// Gets the operators.
        /// </summary>
        public IEnumerable<RatingOperator> Operators
        {
            get
            {
                return Enumeration.GetAll<RatingOperator>();
            }
        }

        /// <summary>
        /// Gets the join operators.
        /// </summary>
        public IEnumerable<RuleJoinOperator> JoinOperators
        {
            get
            {
                return Enumeration.GetAll<RuleJoinOperator>();
            }
        }
    }

Source