Question

我正在尝试使用Entityframework codefirst方法与webapi2应用程序实现多对多的关系。

问题：未在第三个表格中插入值。

其他信息：

如果我正在使用非会员表，它的工作正常。但是当我使用ApplicationUser表（即实体框架创建的表）进行映射时，插入不会发生。我在此applicationuser表中使用了承载令牌身份验证，并根据我的requiremnet添加了一些自定义列。我提到了以下链接

http://www.c-sharpcorner.com/UploadFile/a3d5d0/creating-many-to-many-mapping-using-code-first-entity-frame/。

问题：

我们可以与其他表格建立会员资格（用户，角色）的多对多关系吗？

代码我尝试过：

模型1

public class Strata
{
    [Key]
    public Guid StrataID { get; set; }
    public string StrataNumber { get; set; }
    public string StrataName { get; set; }
    public string StrataType { get; set; }
    public int NumberOfUnits { get; set; }
    public string StreetAddress { get; set; }
    public string City { get; set; }
    public string Province { get; set; }
    [Required(ErrorMessage = "Country required")]
    public string Country { get; set; }
    [Required(ErrorMessage = "Zip code required")]
    public string ZipCode { get; set; }
    public string VerificationCode { get; set; }
    public bool IsActive { get; set; }
    public bool? IsConfirmed { get; set; }
    public string UserId { get; set; }
      [DataType(DataType.Date)]
    public DateTime SubscriptionStartDate { get; set; }
      [DataType(DataType.Date)]
    public DateTime SubscriptionEndDate { get; set; }
    public int PaymentId { get; set; }
    public double Amount { get; set; }
    public string SubscriptionType { get; set; }
    public bool PaymentStatus { get; set; }


    public virtual ICollection<ApplicationUser> ApplicationUsers { get; set; }


    public Strata()
    {
        ApplicationUsers = new List<ApplicationUser>();
    }

}

模型2

  public class ApplicationUser : IdentityUser
    {
        public async Task<ClaimsIdentity> GenerateUserIdentityAsync(UserManager<ApplicationUser> manager, string authenticationType)
        {
            // Note the authenticationType must match the one defined in CookieAuthenticationOptions.AuthenticationType
            var userIdentity = await manager.CreateIdentityAsync(this, authenticationType);
            // Add custom user claims here
            return userIdentity;
        }
        public ApplicationUser()
        {
            Stratas = new List<Strata>();
        }
        public string FirstName { get; set; }
        public string LastName { get; set; }
        public string ConfirmEmailAddress { get; set; }
        public bool   IsActive { get; set; }
        public string CurrentStatus { get; set; }
        public string TypeOfUser { get; set; }
        public bool ResetFlag { get; set; }
        public virtual ICollection<Strata> Stratas
        {
            get;
            set;
        }  
    }

    public class ApplicationDbContext : IdentityDbContext<ApplicationUser>
    {
        public ApplicationDbContext()
            : base("DbContextCondo", throwIfV1Schema: false)
        {
            this.Configuration.LazyLoadingEnabled = false;
            this.Configuration.ProxyCreationEnabled = false;
        }
        protected override void OnModelCreating(DbModelBuilder modelBuilder)
        {
            base.OnModelCreating(modelBuilder); // This needs to go before the other rules!

            //modelBuilder.Entity<ApplicationUser>().ToTable("User");

            modelBuilder.Configurations.Add(new UserMap());
            modelBuilder.Configurations.Add(new StrataMap());
            modelBuilder.Entity<IdentityRole>().ToTable("Role");
            modelBuilder.Entity<IdentityUserRole>().ToTable("UserRole");
            modelBuilder.Entity<IdentityUserClaim>().ToTable("UserClaim");
            modelBuilder.Entity<IdentityUserLogin>().ToTable("UserLogin");

        }
        public static ApplicationDbContext Create()
        {
            return new ApplicationDbContext();
        }

        public DbSet<Strata> Strata { get; set; }


    }

地图1

 public class UserMap : EntityTypeConfiguration<ApplicationUser>
    {

        public UserMap()
        {
            //Primary Key
            this.HasKey(t => t.Id);

            this.Property(t => t.FirstName).HasColumnName("FirstName");
            this.Property(t => t.LastName).HasColumnName("LastName");
            this.Property(t => t.ConfirmEmailAddress).HasColumnName("ConfirmEmailAddress");
            this.Property(t => t.IsActive).HasColumnName("IsActive");
            this.Property(t => t.CurrentStatus).HasColumnName("CurrentStatus");
            this.Property(t => t.TypeOfUser).HasColumnName("TypeOfUser");
            this.Property(t => t.ResetFlag).HasColumnName("ResetFlag");


            // Relationships
            this.HasMany(t => t.Stratas)
                .WithMany(t => t.ApplicationUsers)
                .Map(m =>
                {
                    m.ToTable("UsersStratas");
                    m.MapLeftKey("Id");
                    m.MapRightKey("StrataID");
                });

        }

    }

地图2

public class StrataMap: EntityTypeConfiguration<Strata>
    {

        public StrataMap()
        {

            //Primary Key
            this.HasKey(t => t.StrataID);

            this.Property(t => t.StrataID).HasColumnName("StrataID");
            this.Property(t => t.StrataNumber).HasColumnName("StrataNumber");
            this.Property(t => t.StrataType).HasColumnName("StrataType");
            this.Property(t => t.NumberOfUnits).HasColumnName("NumberOfUnits");
            this.Property(t => t.StreetAddress).HasColumnName("StreetAddress");
            this.Property(t => t.City).HasColumnName("City");
            this.Property(t => t.Province).HasColumnName("Province");
            this.Property(t => t.Country).HasColumnName("Country");
            this.Property(t => t.ZipCode).HasColumnName("ZipCode");
            this.Property(t => t.VerificationCode).HasColumnName("VerificationCode");
            this.Property(t => t.IsActive).HasColumnName("IsActive");
            this.Property(t => t.IsConfirmed).HasColumnName("IsConfirmed");
            this.Property(t => t.UserId).HasColumnName("UserId");
            this.Property(t => t.SubscriptionStartDate).HasColumnName("SubscriptionStartDate");
            this.Property(t => t.SubscriptionEndDate).HasColumnName("SubscriptionEndDate");
            this.Property(t => t.PaymentId).HasColumnName("PaymentId");
            this.Property(t => t.Amount).HasColumnName("Amount");
            this.Property(t => t.SubscriptionType).HasColumnName("SubscriptionType");
            this.Property(t => t.PaymentStatus).HasColumnName("PaymentStatus");

        }
    }

控制器

 public IHttpActionResult PostStrata(Strata strata)
        {
            DTOStrata strataInfo = new DTOStrata();
            try
            {

                if (!ModelState.IsValid)
                {
                    return BadRequest(ModelState);
                }
                strata.StrataID = Guid.NewGuid();
                strata.SubscriptionStartDate = Convert.ToDateTime(DateTime.Now.ToShortDateString().ToString());

                if (strata.SubscriptionType == "Invoice Monthly")
                {
                    strata.SubscriptionEndDate = Convert.ToDateTime(DateTime.Now.AddMonths(6).ToShortDateString().ToString());

                }
                else
                {
                    strata.SubscriptionEndDate = Convert.ToDateTime(DateTime.Now.AddMonths(12).ToShortDateString().ToString());
                }

                strata.IsActive = true;
                strata.PaymentId = 1;
                strata.IsConfirmed = false;

                var verificationCode = VerificationCodeGenerator.GenerateOTP(6);
                strata.VerificationCode = verificationCode;
                db.Strata.Add(strata);
                db.SaveChanges();



            }

如果我错过了代码中的任何内容，请告诉我。或者建议我采用更好的方法。

由于开发

Answer 1

你的OnModelCreating方法是什么样的？映射代码应该在dbContext的此方法中引入，请查看：

Configure Many-to-Many relationship

但如果您想使用EntityTypeConfiguration进行映射，是否已将配置添加到模型中？为此，您必须在OnModelCreating中的dbContext方法中使用此代码：

  protected override void OnModelCreating(ModelBuilder modelBuilder)
  {
    base.OnModelCreating(modelBuilder);

    modelBuilder.Configurations.Add(new UserMap());

  }

要获得样本，请查看以下内容： Using the Code First Model ConfigurationClasses

实体框架成员表的多对多关系。代码第一种方法

1 个答案: