I have a model in another model. When I try to check the modelstate it is invalid. This is because the other model in this model is null.
Project.cs:
using System.ComponentModel.DataAnnotations;
namespace Toolbox.Models
{
public class Project
{
[Key]
public int Id { get; set; }
public string Name { get; set; }
public WorkPreparation WorkPreparation { get; set; }
}
}
WorkPreparation.cs:
using System.ComponentModel.DataAnnotations;
namespace Toolbox.Models
{
public class WorkPreparation
{
[Key]
public int Id { get; set; }
public int ProjectId { get; set; }
public CentralHeating CentralHeating { get; set; }
public Pluming Pluming { get; set; }
public Ventilation Ventilation { get; set; }
public Project Project { get; set; }
}
}
Does anybody have any suggestion?
If you use .net6, try to remove <Nullable>enable</Nullable> in your project.csproj.
Related
I work on an API and when I want to get data from a many-to-many relationship, I get back null.
The connection with the database is OK, and Post date work.
But when I get info from the database, the table for the many-to-many relationship is empty
public class User
{
[Key]
public int Id { get; set; }
[Required]
[MaxLength(30)]
public string Pseudo { get; set; }
[EmailAddress]
public string Mail { get; set; }
[Required]
public string Pwd { get; set; }
[Required]
public bool IsAdmin { get; set; }
public ICollection<Project> UsersProjectstry { get; set; }
public ICollection<UserProjectMTM> UsersProjects { get; set; }
}
public class Project
{
[Key]
public int Id { get; set; }
[Required]
[MaxLength(30)]
public string Name { get; set; }
[Required]
[MinLength(100)]
public string Description { get; set; }
public string? img { get; set; }
[Required]
public DateTime StartDate { get; set; }
[Required]
public DateTime EndDate { get; set; }
[Required]
public int SumGoal { get; set; }
public int Sum { get; set; }
[Required]
public User ProjectManager { get; set; }
public ICollection<UserProjectMTM> Donator { get; set; }
}
public class UserProjectMTM
{
public int PId { get; set; }
public Project Project { get; set; }
public int UId { get; set; }
public User User { get; set; }
}
protected override void OnModelCreating(ModelBuilder modelBuilder)
{
modelBuilder.ApplyConfiguration(new ProjectConfig());
modelBuilder.ApplyConfiguration(new UserConfig());
modelBuilder.ApplyConfiguration(new CommentConfig());
modelBuilder.Entity<UserProjectMTM>().HasKey(x => new { x.UId, x.PId });
modelBuilder.Entity<UserProjectMTM>().HasOne(p=> p.Project).WithMany(u=> u.Donator).HasForeignKey(x=>x.PId);
modelBuilder.Entity<UserProjectMTM>().HasOne(u => u.User).WithMany(p=> p.UsersProjects).HasForeignKey(x => x.UId);
}
public IEnumerable<TEntity> GetAll()
{
return _Context.Set<TEntity>();
}
public TEntity? GetById(params object[] Id)
{
return _Context.Set<TEntity>().Find(Id);
}
I try a lot of things - so far without success.
I'm junior and I can't find the solution - please help.
I have a complex model with multiple levels, i am using Swashbuckle.
how can I ignore related models in swagger UI? and show just the first level of the model?
See the below example, I want to ignore all relations like JobTitleVM and ICollection.
public class UserVM
{
public int Id { get; set; }
public Guid Guid { get; set; }
public string FirstName { get; set; }
public string LastName { get; set; }
public string Token { get; set; }
public string Avatar { get; set; }
public int IsActive { get; set; }
public int JobTitleId { get; set; }
public JobTitleVM JobTitle { get; set; }
public int UserStatusId { get; set; }
public UserStatusVM UserStatus { get; set; }
public virtual ICollection<UserStepsVM> UserSteps { get; set; } = new List<UserStepsVM>();
}
I have created an api in asp net core 2.1 and I have three layers inside it (PwP.Web).
In the layer (PWP.DomainClasses) I defined a class with the following specifications and in the layer (PWP.DataLayer) a class called PWPDbContext and inside it I want to define the user class as prop but it warns and is not used, how this Solve the problem?
User.cs:
using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Text;
namespace PWP.DataLayer.User
{
public class User
{
[Key]
[Required]
public int UserId { get; set; }
[Required]
[MaxLength(50)]
public string UserName { get; set; }
[Required]
[MaxLength(32)]
public string Password { get; set; }
[Required]
[MaxLength(150)]
public string Email { get; set; }
[MaxLength(200)]
public string imageAddress { get; set; }
//
public virtual UserInfo.UserInfo UserInfo { get; set; }
}
}
PWPContext.cs:
using Microsoft.EntityFrameworkCore;
using PWP.DomainClasses.user;
namespace PWP.DataLayer.Context
{
class PWPDbContext:DbContext
{
public PWPDbContext(DbContextOptions<PWPDbContext> options): base(options)
{
}
public DbSet<User> Users { get; set; }
public DbSet<UserInfo> UserInfos { get; set; }
public DbSet<Document> Documents { get; set; }
public DbSet<Expertise> Expertises { get; set; }
public DbSet<Message> Messages { get; set; }
public DbSet<Record> Records { get; set; }
public DbSet<STFile> STFiles { get; set; }
}
}
From this line of code:
public virtual UserInfo.UserInfo UserInfo { get; set; }
It can be seen that you named the class with the exact same name as it's namespace.
You should differentiate between them.
Don't (!) do that:
namespace UserInfo
{
public class UserInfo
{
}
}
I have a model where i have scaffold it with Mvc Scaffolding, All Fields with DateTime Property in my model are marked as Required i mean i can not enter a null value in it. Even though in my model there is no [Required] attribute for Date fields. I want to get rid of this issue, any idea?
Here is my Model.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
namespace MVCMembershipBootstrap.Models.FirstComponent
{
public class FirstCmActivity
{
public int FirstCmActivityId { get; set; }
public string Name { get; set; }
public DateTime PlannedStartDate { get; set; }
public DateTime PlannedEndDate { get; set; }
public DateTime OngoingStartDate { get; set; }
public DateTime OngoingEndDate { get; set; }
public DateTime FinishedDate { get; set; }
public string GizResponsible { get; set; }
public string PartnerResponsible { get; set; }
public string swAfghanSide { get; set; }
public string swGiz { get; set; }
public string swRodeco { get; set; }
public string swExtern { get; set; }
public string EquipmentNeeds { get; set; }
public string EquipmentExist { get; set; }
public string MileStone { get; set; }
public int FirstCmOutputId { get; set; }
public virtual FirstCmOutput Output { get; set; }
}
}
Here is My Controller...
public class FirstCmActivitiesController : Controller
{
private OPandMEContext context = new OPandMEContext();
//
// GET: /FirstCmActivities/
public ViewResult Index()
{
return View(context.FirstCmActivities.ToList());
}
public ViewResult Report()
{
return View();
}
//
// GET: /FirstCmActivities/Details/5
public ViewResult Details(int id)
{
FirstCmActivity firstcmactivity = context.FirstCmActivities.Single(x => x.FirstCmActivityId == id);
return View(firstcmactivity);
}
//
// GET: /FirstCmActivities/Create
public ActionResult Create()
{
ViewBag.PossibleFirstCmOutputs = context.FirstCmOutputs;
return View();
}
//
// POST: /FirstCmActivities/Create
[HttpPost]
public ActionResult Create(FirstCmActivity firstcmactivity)
{
if (ModelState.IsValid)
{
context.FirstCmActivities.Add(firstcmactivity);
context.SaveChanges();
Response.Redirect("http://localhost:53785/firstcmActivities/Create#services");
}
ViewBag.PossibleFirstCmOutputs = context.FirstCmOutputs;
return View(firstcmactivity);
}
Thanks
Just Correct your properties of Datetime as nullable.
Example :-
public DateTime? PlannedStartDate { get; set; }
I think entity framework has problem while generating database in my project. That's strange that it only happens in one case. This is one to many relationship between "User" and "Playlist". One User has many Playlists.
Here is my code, I used some abstract classes in my project.
Core code
Playlist class
public virtual User User { get; set; }
User class
public virtual ICollection<Playlist> Playlists { get; set; }
The full code:
Generic class:
using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Web;
namespace xxx.Areas.admin.Models
{
public abstract class Generic
{
[Display(Name = "Ngày tạo")]
public DateTime? Created { get; set; }
[Display(Name = "Lần sửa cuối")]
public DateTime? Modified { get; set; }
[Display(Name = "Trạng thái")]
public bool? IsActive { get; set; }
}
}
Post class:
using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Web;
namespace xxx.Areas.admin.Models
{
public abstract class Post : Generic
{
public string Title { get; set; }
public string Slug { get; set; }
public string Content { get; set; }
public string Image { get; set; }
public int Views { get; set; }
public bool? AllowComment { get; set; }
public User ModifiedBy { get; set; }
public virtual ICollection<Media> Medias { get; set; }
}
}
AlbumBase class:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using xxx.Areas.admin.Models.SongBase;
namespace xxx.Areas.admin.Models.AlbumBase
{
public abstract class AlbumBase : Post
{
public bool IsPublic { get; set; }
public bool IsFeatured { get; set; }
public int OldID { get; set; }
public string OldSlug { get; set; }
public virtual ICollection<Comment> Comments { get; set; }
}
}
Playlist class:
using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Web;
using xxx.Areas.admin.Models.SongBase;
namespace xxx.Areas.admin.Models.AlbumBase
{
public class Playlist : AlbumBase
{
[Key]
public int PlaylistID { get; set; }
public virtual ICollection<Song> Songs { get; set; }
public virtual ICollection<Folk> Folks { get; set; }
public virtual ICollection<Instrumental> Instrumentals { get; set; }
public virtual User User { get; set; }
public Playlist()
{ }
public Playlist(string name)
{
Title = name;
Slug = Functions.URLFriendly(Title);
Views = 0;
OldID = 0;
AllowComment = true;
IsActive = true;
IsPublic = false;
IsFeatured = false;
Created = DateTime.Now;
}
}
}
and User class:
using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Web;
using baicadicungnamthang.Areas.admin.Models.AlbumBase;
using baicadicungnamthang.Areas.admin.Models.Social;
using baicadicungnamthang.DAL;
using ICB;
namespace xxx.Areas.admin.Models
{
public class User : Generic
{
[Key]
public int UserID { get; set; }
[Required(ErrorMessage = "Bạn phải nhập tên tài khoản"), StringLength(50)]
public string UserName { get; set; }
public string Password { get; set; }
public string HashPassword { get; set; }
[Required(ErrorMessage = "Bạn phải nhập địa chỉ email"), EmailAddress(ErrorMessage = "Địa chỉ email không hợp lệ")]
public string Email { get; set; }
[StringLength(50)]
public string NickName { get; set; }
public string FullName { get; set; }
public string Slug { get; set; }
public string Title { get; set; }
public string Phone { get; set; }
public string Avatar { get; set; }
public DateTime? DOB { get; set; }
[StringLength(1)]
public string Gender { get; set; }
public string Address { get; set; }
public int TotalLikes { get; set; }
public int TotalComments { get; set; }
public int Views { get; set; }
public string ActivationKey { get; set; }
public string RecoverKey { get; set; }
public DateTime? LastLogin { get; set; }
public int OldID { get; set; }
public virtual Role Role { get; set; }
public virtual ICollection<Comment> Comments { get; set; }
public virtual ICollection<Comment> RateComments { get; set; }
public virtual ICollection<Playlist> Playlists { get; set; }
public virtual ICollection<User> Friends { get; set; }
public virtual ICollection<Message> MessagesSent { get; set; }
public virtual ICollection<Message> MessagesReceived { get; set; }
public User()
{
Created = DateTime.Now;
IsActive = false;
TotalLikes = 0;
Views = 0;
OldID = 0;
}
public string getAvatar(int w, int h)
{
return Functions.getAvatarThumb(UserName, w, h);
}
public int getAge()
{
if (DOB == null)
{
return 0;
}
else
{
DateTime now = DateTime.Now;
int age = now.Year - DOB.Value.Year;
return age;
}
}
public string getGender()
{
if (Gender == "M")
{
return "Nam";
}
else if (Gender == "F")
{
return "Nữ";
}
else return "";
}
}
}
And this is Playlist table generating from code first:
As you see, entity framework has generated two columns: User_UserID and User_UserID1 from primary key UserID of User table.
I say that because when I uncomment the line
//public virtual User User { get; set; }
and rebuild the project, the two column User_UserID and User_UserID1 has disappeared too.
The problem only happens with User and Playlist relationship. With other one-to-many scenarios (User-Comments), system work well.
Can anyone give me a suggestion?
The problem is that you have multiple relationships between the same entities.
Playlist has 2 references to User (one in the Playlist class and one in its base class Post).
This confuses Entity Framework, because it doesn't know how to map the relationships, which is why it creates too many foreign keys in the database.
To fix this you can use the InverseProperty attribute to tell it how to map the navigation properties:
public class Playlist : AlbumBase
{
[Key]
public int PlaylistID { get; set; }
[InverseProperty("Playlists")]
public virtual User User { get; set; }
......