MVC 实体框架映射正确,但表不正确

本文关键字:不正确 实体 框架 映射 MVC | 更新日期: 2023-09-27 18:37:26

我目前正在使用 MVC4 实体框架制作一个票务系统。

3类之间的关系用户到管理员 = 1:0...1 1 到 0 或 1 = 很少有用户具有管理员状态,但不是全部。

管理员到工单 = 1:*|1 到多 = 管理员可以分配多个票证,但一个票证只能分配给一个管理员

用户到工单 = 1:*|1 到多 = 用户可以打开多个工单,但一个工单只能有一个用户。

以下是我当前的表。

我的

问题是为什么我的管理表显示不正确地看到这里

我希望每张票证都由 TicketID 标识,因此在 Admin 表上它应该有 AdminID(将解决问题的管理员)、UserID(提交工单的人)和 TicketID。

我遵循了一个教程,该教程显示了 1 到多个关系,其中团队 = 管理员(1) 到玩家 = 票证(许多)

球员.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
}

团队.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。

用户.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; }
    }

门票.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.cs

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; }
}

配置.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();
        }
    }
}

MVC 实体框架映射正确,但表不正确

一切

看起来都很好。 如果您有多对一的管理员票证,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。并且管理表上没有此关系的列。这就是它的工作原理!