everything/EveryThing/Models/CodeTable/CodeTableItem.cs

using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;
using EveryThing.Models.Project;

namespace EveryThing.Models.CodeTable
{
    public enum CodeTableItemType
    {
        [Display(Name = "Produkt")]
        Product = 0,

        [Display(Name = "Material")]
        Material = 1
    }
    public class CodeTableItem
    {
        [Key]
        public int IdItem { get; set; }

        [Required]
        [ForeignKey("Company")]
        public int IdCompanyFk { get; set; }

        [Required]
        [Display(Name = "Naziv")]
        public string Title { get; set; }

        [Display(Name = "Pot dokumentov")]
        public string Description { get; set; }

        [Required]
        [Display(Name = "Aktiven")]
        public bool Active { get; set; }

        [Required]
        [Display(Name = "Tip")]
        public CodeTableItemType CodeTableItemType { get; set; } = CodeTableItemType.Product;

        // ForeignKey
        public CodeTableCompany Company { get; set; }

        // ProjectPartItem
        [InverseProperty("Item")]
        public virtual ICollection<ProjectPartItem> ItemProjectPartItem { get; set; }

        // ProjectPartItem
        [InverseProperty("Material")]
        public virtual ICollection<ProjectPartItem> ItemProjectPartItemMaterial { get; set; }

        // InoviceItem
        [InverseProperty("Item")]
        public virtual ICollection<Invoice.InvoiceItem> InvoiceItem { get; set; }
    }
}