Question

我正在尝试使用AdminID = 1和dminID = administrator.Single(c => c.AdminID == 1 ).AdminID,分配一个带有adminID的Tickets，但它们似乎都不起作用。在程序包管理器控制台中执行update-database后，似乎没有任何效果：

Configration.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},
        new User { FirstMidName = "Andy", LastName = "Domagas",
            EnrollmentDate = DateTime.Parse("2016-02-18"), DepartmentID = 1,DepotID = 1},
        new User { FirstMidName = "Denis",   LastName = "Djohar",
            EnrollmentDate = DateTime.Parse("2016-02-18"), DepartmentID = 1 ,DepotID = 1},
        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 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 administrator = new List<Administrator>
        {
            new Administrator { AdminRole = "Administrator LVL1", User = users.Single ( s => s.UserID == 1),
            Tickets = new List<Ticket>() },
            new Administrator { AdminRole = "Administrator LVL2", User = users.Single ( s => s.UserID == 2),
            Tickets = new List<Ticket>() },
            new Administrator { AdminRole = "Administrator LVL3", User = users.Single ( s => s.UserID == 3),
            Tickets = new List<Ticket>() }

        };
        administrator.ForEach(s => context.Administrators.AddOrUpdate(p => p.UserID, 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 = ("Test Error 1"),
                Priority = Priority.High
            },
            new Ticket {
                UserID = users.Single(s => s.LastName == "Wan").UserID,
                CategoryID = categories.Single(c => c.Title == "Desktop" ).CategoryID,

                Issue = ("Test Error 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();
    }
}

Administrator.cs

public class Administrator
    {
    [Key, ForeignKey("User")]
    public int UserID { get; set; }

    [StringLength(50)]
    public string AdminRole { get; set; }
    public virtual ICollection<Ticket> Tickets { get; set; }
    public virtual User User { get; set; }
}

User.cs

public class User
{

    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 virtual Administrator Administrator { 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 virtual ICollection<Ticket> Tickets { get; set; }

}

Ticket.cs

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

        public virtual ICollection<Administrator> Administrators { get; set; }
        public int UserID { get; set; }
        //[ForeignKey("TicketID")]
        public virtual User User { get; set; }

    }

IssueContext.cs

public class IssueContext : DbContext
    {
        public DbSet<User> Users { get; set; }
        public DbSet<Ticket> Tickets { get; set; }
        public DbSet<Category> Categories { get; set; }
        public DbSet<Department> Departments { get; set; }
        public DbSet<Administrator> Administrators { get; set; }
        public DbSet<Depot> Depots { get; set; }


        protected override void OnModelCreating(DbModelBuilder modelBuilder)
        {
            modelBuilder.Conventions.Remove<PluralizingTableNameConvention>();

            modelBuilder.Entity<Ticket>()
                .HasMany(c => c.Administrators).WithMany(i => i.Tickets)
                .Map(t => t.MapLeftKey("TicketID")
                    .MapRightKey("AdministratorID")
                    .ToTable("AdministratorsTickets"));


            modelBuilder.Entity<Administrator>()
                       .HasKey(e => e.UserID);

            modelBuilder.Entity<Administrator>()
                .HasOptional(s => s.User)
                .WithRequired(ad => ad.Administrator);


        }
    }

此映射工具导致此错误

在模型生成期间检测到一个或多个验证错误：

Administrator_User_Target ::多重性在角色中无效   关系'Administrator_User'中的'Administrator_User_Target'。   因为Dependent Role属性不是关键属性，所以   依赖角色的多重性的上限必须是'*'。

modelBuilder.Entity<Administrator>()
           .HasKey(e => e.UserID);

modelBuilder.Entity<Administrator>()
    .HasOptional(s => s.User)
    .WithRequired(ad => ad.Administrator);

这是工作中的

        modelBuilder.Entity<Administrator>()
                   .HasKey(e => e.UserID);

        modelBuilder.Entity<User>()
            .HasOptional(s => s.Administrator) 
            .WithRequired(ad => ad.User);

MVC EF如何在configuration.cs文件中分配值

0 个答案: