SUBD/ForumDatabaseImplement/Models/Question.cs

using ForumContracts.BindingModels;
using ForumContracts.ViewModels;
using ForumDataModels.Models;
using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;

namespace ForumDatabaseImplement.Models
{
    public class Question : IQuestionModel
    {
        [Required]
        public DateTime CreateDate { get; set; } = DateTime.Now;

        public int UserId { get; set; }

        public int CategoryId { get; set; }

        public int Id { get; set; }

        [Required]
        public string QuestionDes { get; set; } = string.Empty;

        public virtual User User { get; set; }

        public virtual Category Category { get; set; }

        [ForeignKey("QuestionId")]
        public virtual List<Answer> Answers { get; set; } = new();

        public static Question? Create(QuestionBindingModel model)
        {
            if (model == null)
            {
                return null;
            }
            return new Question()
            {
                Id = model.Id,
                CreateDate = model.CreateDate,
                UserId = model.UserId,
                CategoryId = model.CategoryId,
                QuestionDes = model.QuestionDes
            };
        }
        public static Question Create(QuestionViewModel model)
        {
            return new Question
            {
                Id = model.Id,
                UserId = model.UserId,
                CategoryId = model.CategoryId,
                CreateDate = model.CreateDate,
                QuestionDes = model.QuestionDes
            };
        }
        public void Update(QuestionBindingModel model)
        {
            if (model == null)
            {
                return;
            }
            UserId = model.UserId;
            CategoryId = model.CategoryId;
            CreateDate = model.CreateDate;
            QuestionDes = model.QuestionDes;
        }
        public QuestionViewModel GetViewModel => new()
        {
            Id = Id,
            UserId = UserId,
            UserName = User?.Nickname ?? string.Empty,
            CategoryId = CategoryId,
            CreateDate = CreateDate,
            QuestionDes = QuestionDes,
            CategoryName=Category?.Name
        };
    }
}