#nullable enable

using System;

using System.Collections.Generic;

using System.Linq;

using System.Linq.Expressions;

using Mapster;

using Bogus;

public class Program

{

    public static void Main()

    {

        TypeAdapterConfig config=TypeAdapterConfig.GlobalSettings;

        config.ForType<Abc,AbcDto>().IgnoreNullValues(true);

        var test=new TestData();

        IQueryable<Abc> abcs=DataFaker.AbcFaker().Generate(10).AsQueryable();

        test.AbcDtos=abcs.ProjectToType<AbcDto>();

        test.Abcs=abcs;

        test.Abcs.Take(13).Dump();

    }

}

public class Abc{

    public string Name {get;set;}

    public int? Age {get;set;}

    public string FavoriteColor {get;set;}

}

​

​

public class TestData{

    public IQueryable<Abc> Abcs {get;set;}=default!;

    public IQueryable<AbcDto>? AbcDtos {get;set;}=null; 

}

public static class DataFaker {

    public static Faker<Abc> AbcFaker(){

        return new Faker<Abc>().RuleFor(c=>c.Name,c=>c.Random.Bool(.5f) ? c.Person.FullName : null).RuleFor(c=>c.Age,c=>c.Random.Bool(.6f) ? c.Random.Int(7,81) : null).RuleFor(c=>c.FavoriteColor, c=>c.Random.Bool(.7f) ? c.Commerce.Color() : null);

}

}

​

public record AbcDto{

    public string? Name {get;set;}=default!;

    public int? Age  {get;set;}

    public string? FavoriteColor {get;set;}=default!;

}