MVC实体框架映射正确，但表不正确

Question

我目前正在使用MVC4实体框架制作票务系统。

3个类之间的关系用户与管理员= 1：0 ... 1 1至0或1 =很少有用户具有管理员身份，但不是全部。

管理员到票证= 1：* | 1到很多=管理员可以分配多于1张票证，但一张票证只能分配给一位管理员

用户到票证= 1：* | 1到很多=用户可以打开多张票证，但一张票证只能有一个用户。

这是我当前的表格。

我的问题是为什么我的管理表显示不正确，请参见此处

我希望每个票证都由TicketID标识，因此在Admin表上，它应该具有AdminID（将解决问题的Admin），UserID（提交票证的人）和TicketID。

我遵循的教程显示了一对多的关系，其中团队=管理员（1）与玩家=门票（许多）

Player.cs（门票）

public class Player
{
    public int PlayerId { get; set; }
    public string Name { get; set; }
    public int TeamId { get; set; }

    public virtual Team Team { get; set; } // This is new
}

Team.cs（管理员）

public class Team
{
    public int TeamId { get; set; }
    [Required] public string Name { get; set; }
    public string City { get; set; }
    public DateTime Founded { get; set; }

    public virtual ICollection<player> Players { get; set; } // This is new
}

我的代码。

User.cs

    public class User
    {
        [Key]
        public int UserID { get; set; }
        [StringLength(50, MinimumLength = 1)]
        public string LastName { get; set; }
        [StringLength(50, MinimumLength = 1, ErrorMessage = "First name cannot be longer than 50 characters.")]

        [Column("FirstName")]
        public string FirstMidName { get; set; }

        [DataType(DataType.Date)]
        [DisplayFormat(DataFormatString = "{0:yyyy-MM-dd}", ApplyFormatInEditMode = true)]
        public DateTime EnrollmentDate { get; set; }

        public string FullName
        {
            get { return LastName + ", " + FirstMidName; }
        }
   //     public int AdminiID { get; set; }
        [ForeignKey("AdminID")]
        public virtual Administrator Administrator { get; set; }

        public string AdminRole { get; set; }


        public int DepartmentID { get; set; }
        [ForeignKey("DepartmentID")]
        public virtual Department Department { get; set; }


        public int DepotID { get; set; }
        [ForeignKey("DepotID")]
        public virtual Depot Depot { get; set; }

        //public int TicketID { get; set; }
        public virtual ICollection<Ticket> Tickets { get; set; }

    }

Ticket.cs

public class Ticket
{
    public int TicketID { get; set; }
    public string Issue { get; set; }
    [DisplayFormat(NullDisplayText = "No Priority")]
    public Priority? Priority { get; set; }

    [ForeignKey("CategoryID")]
    public virtual Category Category { get; set; }
    public int CategoryID { get; set; }
    public int AdminID { get; set; }
    //[ForeignKey("AdminID")]
    //public Administrator Admin { get; set; }

    [ForeignKey("UserID")]
    public virtual User User { get; set; }
    public int UserID { get; set; }
}

管理员

public class Administrator
{
    [ForeignKey("User")]
    public int UserID { get; set; }
    [Key]
    public int AdminID { get; set; }
    public int TicketID { get; set; }        
    [StringLength(50)]

    public virtual ICollection<Ticket> Tickets { get; set; }
    public virtual User User { get; set; }
}

Configuration.cs

namespace RecreationServicesTicketingSystem.Migrations
{
    using System;
    using System.Data.Entity;
    using System.Data.Entity.Migrations;
    using System.Linq;
    using RecreationalServicesTicketingSystem.Models;
    using System.Collections.Generic;

    internal sealed class Configuration : DbMigrationsConfiguration<RecreationalServicesTicketingSystem.DAL.IssueContext>
    {
        public Configuration()
        {
            AutomaticMigrationsEnabled = false;
        }

        protected override void Seed(RecreationalServicesTicketingSystem.DAL.IssueContext context)
        {
            var departments = new List<Department>
            {
                new Department { DepartmentID = 1, Name = "IT"},
                new Department { DepartmentID = 2, Name = "Admin" },
                new Department { DepartmentID = 3, Name = "Human Resources"},
                new Department { DepartmentID = 4, Name = "Mechanics" },
                new Department { DepartmentID = 5, Name = "Directors" },
                new Department { DepartmentID = 6, Name = "Operations"}

            };
            departments.ForEach(s => context.Departments.AddOrUpdate(p => p.Name, s));
            context.SaveChanges();


            var depots = new List<Depot>
            {
                new Depot { DepotID = 1, Name = "Porana"},
                new Depot { DepotID = 2, Name = "Far North"},


            };
            depots.ForEach(s => context.Depots.AddOrUpdate(p => p.Name, s));
            context.SaveChanges();

            var users = new List<User>
        {
            new User { FirstMidName = "Jason",   LastName = "Wan",
                EnrollmentDate = DateTime.Parse("2016-02-18"), DepartmentID = 1, DepotID = 1,AdminRole="Administrator LVL1"},
            new User { FirstMidName = "Andy", LastName = "Domagas",
                EnrollmentDate = DateTime.Parse("2016-02-18"), DepartmentID = 1,DepotID = 1,AdminRole="Administrator LVL2"},
            new User { FirstMidName = "Denis",   LastName = "Djohar",
                EnrollmentDate = DateTime.Parse("2016-02-18"), DepartmentID = 1 ,DepotID = 1,AdminRole="Administrator LVL3"},
            new User { FirstMidName = "Christine",   LastName = "West",
                EnrollmentDate = DateTime.Parse("2016-02-18"), DepartmentID = 1, DepotID = 1},

        };


            users.ForEach(s => context.Users.AddOrUpdate(p => p.FirstMidName, s));
            context.SaveChanges();

            users.ForEach(s => context.Users.AddOrUpdate(p => p.LastName, s));
            context.SaveChanges();


            var administrator = new List<Administrator>
            {
                new Administrator {AdminID = 1,  User = users.Single ( s => s.UserID == 1),
                /*Tickets = new List<Ticket>()*/ },
                new Administrator {AdminID = 2, User = users.Single ( s => s.UserID == 2),
                /*Tickets = new List<Ticket>()*/ },
                new Administrator {AdminID = 3,  User = users.Single ( s => s.UserID == 3),
                /*Tickets = new List<Ticket>() */}

            };
            administrator.ForEach(s => context.Administrators.AddOrUpdate(p => p.AdminID, s));
            context.SaveChanges();

            var categories = new List<Category>
            {
                new Category {CategoryID = 0001, Title = "Desktop"},
                new Category {CategoryID = 0002, Title = "Mobile"},
                new Category {CategoryID = 0003, Title = "Menzits"},
                new Category {CategoryID = 0004, Title = "XMPRO"},
                new Category {CategoryID = 0005, Title = "Con-X"},
                new Category {CategoryID = 0006, Title = "Promapp"},
                new Category {CategoryID = 0007, Title = "QGIS"},
            };
            categories.ForEach(s => context.Categories.AddOrUpdate(p => p.Title, s));
            context.SaveChanges();

            var tickets = new List<Ticket>
            {
                new Ticket {
                    UserID = users.Single(s => s.LastName == "Wan").UserID,
                    CategoryID = categories.Single(c => c.Title == "Con-X" ).CategoryID,
                    Issue = ("Con-X Login Error"),
                    AdminID = 1,
                    Priority = Priority.High
                },
                new Ticket {
                    UserID = users.Single(s => s.LastName == "Wan").UserID,
                    CategoryID = categories.Single(c => c.Title == "Desktop" ).CategoryID,
                    Issue = ("Can't remote access C0123"),
                    AdminID = 2,
                    Priority = Priority.Med
                },
            };


            foreach (Ticket e in tickets)
            {
                var ticketInDataBase = context.Tickets.Where(
                    s =>
                        s.User.UserID == e.UserID &&
                        s.Category.CategoryID == e.CategoryID).SingleOrDefault();
                if (ticketInDataBase == null)
                {
                    context.Tickets.Add(e);
                }
            }
            context.SaveChanges();
        }
    }
}

Answer 1

一切看起来都很好。 如果您有多对一的票证管理员，则有一些（许多）票证属于一个管理员，因此它们应该有一个AdminID列。 并且在管理表上没有此关系的列。 这就是它的工作原理！