Question

NOTE: This is an entire rewrite of the previous question.

I have a model.

class Paragraph
{
    public int Id { get; set; }

    public int SectionId { get; set; }
    public virtual Section Section { get; set; }

    public int Major { get; set; }
    public int Option { get; set; }

    public ICollection<Paragraph> Options
    {
        get
        {
            // What I'm trying to return is:
            //
            //     Section.Paragraphs
            //     .Where(p => p.Major == Major && p.Option != Option)
            //     .ToList()
        }
    }
}

It is involved in a one to many relationship; where each Section has many Paragraphs. What I’m trying to return is a list of paragraphs where their Major is the same as the entity’s Major and the Option isn’t the same. Basically.

Where(p => p.Major == Major && p.Option != Option)

Any advice on how to accomplish this? Thank you.

Answer 1

I solved it. Woop-woop! All I did was check if Section was null, and if it was I returned a blank List<Paragraph>. So Options becomes.

    public ICollection<Paragraph> Options
    {
        get
        {
            if (Section != null)
            {
                return Section.Paragraphs
                    .Where(p => p.Major == Major && p.Option != Option)
                    .ToList();
            }
            else
            {
                return new List<Paragraph>();
            }
        }
    }