Question

我这个问题已经持续了一个星期了。我已经在Web上搜索了多个源，而Stackoverflow则在Entity Framework 6（EF 6）中将Identity模型的外键引用到IdentityUser类。

我尝试过设置DbContext，Model，自定义IdentityUser类的许多不同变体。

最后，我尝试在为IdentityUserLogin，IdentityRole和IdentityUserRole实现HasKey方法时添加OnModelCreating。

以下是我目前的代码：

IdentityModel

 public class ApplicationUser : IdentityUser
    {

        [Required]
        public string Fullname { get; set; }
        [Required]
        public string Province { get; set; }
        [Required]
        public string Company { get; set; }
        public virtual ICollection<Expense> Expenses { get; set; }

        public async Task<ClaimsIdentity> GenerateUserIdentityAsync(UserManager<ApplicationUser> manager)
        {
            // Note the authenticationType must match the one defined in CookieAuthenticationOptions.AuthenticationType
            var userIdentity = await manager.CreateIdentityAsync(this, DefaultAuthenticationTypes.ApplicationCookie);
            // Add custom user claims here
            return userIdentity;
        }


    }

    public class ApplicationDbContext : IdentityDbContext<ApplicationUser>
    {
        public ApplicationDbContext()
            : base("PacificPetEntities", throwIfV1Schema: false)
        {
        }

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

        protected override void OnModelCreating(DbModelBuilder modelBuilder)
        {
            modelBuilder.Entity<IdentityUserLogin>().HasKey<string>(l => l.UserId);
            modelBuilder.Entity<IdentityRole>().HasKey<string>(r => r.Id);
            modelBuilder.Entity<IdentityUserRole>().HasKey(r => new { r.RoleId, r.UserId });

            base.OnModelCreating(modelBuilder);

        }

        //public DbSet<ApplicationUser> ApplicationUsers { get; set; }

    }

配置

 internal sealed class ExpensesConfiguration : DbMigrationsConfiguration<PacificPetExpensesDb>
    {
        public ExpensesConfiguration()
        {
            AutomaticMigrationsEnabled = true;
            ContextKey = "PacificPetExpenses.Models.PacificPetExpensesDb";
        }

        protected override void Seed(PacificPetExpensesDb context)
        {
            //  This method will be called after migrating to the latest version.

            //  You can use the DbSet<T>.AddOrUpdate() helper extension method 
            //  to avoid creating duplicate seed data. E.g.
            //
            //    context.People.AddOrUpdate(
            //      p => p.FullName,
            //      new Person { FullName = "Andrew Peters" },
            //      new Person { FullName = "Brice Lambson" },
            //      new Person { FullName = "Rowan Miller" }
            //    );
            //
        }
    }


    internal sealed class UserConfiguration : DbMigrationsConfiguration<ApplicationDbContext>
    {
        public UserConfiguration()
        {
            AutomaticMigrationsEnabled = true;
            ContextKey = "PacificPetExpenses.Models.ApplicationDbContext";
        }

        protected override void Seed(ApplicationDbContext context)
        {
            //  This method will be called after migrating to the latest version.

            //  You can use the DbSet<T>.AddOrUpdate() helper extension method 
            //  to avoid creating duplicate seed data. E.g.
            //
            //    context.People.AddOrUpdate(
            //      p => p.FullName,
            //      new Person { FullName = "Andrew Peters" },
            //      new Person { FullName = "Brice Lambson" },
            //      new Person { FullName = "Rowan Miller" }
            //    );
            //
        }
    }

的DbContext

public class PacificPetExpensesDb : DbContext
    {

        public PacificPetExpensesDb()
            : base("PacificPetEntities")
        {
            //Create database always, even If exists
            Database.SetInitializer<PacificPetExpensesDb>(new CreateDatabaseIfNotExists<PacificPetExpensesDb>());
        }

        public DbSet<Expense> Expenses { get; set; }



    }

我的模特

public class Expense : IValidatableObject
    {
        [Key]
        [DatabaseGeneratedAttribute(DatabaseGeneratedOption.Identity)]
        public int ID { get; set; }
        [Required]
        public string Category { get; set; }
        public string Description { get; set; }

        [Required]
        [Display(Name = "Gross Amount")]
        public double GrossAmount { get; set; }
        [Required]
        [Display(Name = "Tax Amount")]
        public double TaxAmount { get; set; }
        [Required]
        [Display(Name = "Net Amount")]
        public double NetAmount { get; set; }
        public int Mileage { get; set; }
        [Display(Name = "Mileage Rate")]
        public double MileageRate { get; set; }

        [Required]
        [Display(Name = "Date Submitted")]
        public DateTime? DateSubmitted { get; set; }
        [Required]
        [Display(Name = "Expense Date")]
        public DateTime? ExpenseDate { get; set; }


        //public string UserId { get; set; }
        //[ForeignKey("UserId")]
        public virtual ApplicationUser ApplicationUser { get; set; }



        public IEnumerable<ValidationResult> Validate(ValidationContext validationContext)
        {
            if (Category == "Auto - Mileage" && Mileage == 0)
            {
                yield return new ValidationResult("You must enter a mileage amount if the chosen category is mileage.");
            }
        }

    }

每次我运行我的Entity Framework代码的任何变体时，都会收到以下错误消息：

在模型生成期间检测到一个或多个验证错误：


PacificPetExpenses.Models.IdentityUserLogin :: EntityType   ＆＃39; IdentityUserLogin＆＃39;没有定义键。为此定义密钥   的EntityType。

PacificPetExpenses.Models.IdentityUserRole :: EntityType   ＆＃39; IdentityUserRole＆＃39;没有定义键。为此定义密钥   的EntityType。

IdentityUserLogins：EntityType：EntitySet   ＆＃39; IdentityUserLogins＆＃39;基于类型＆＃39; IdentityUserLogin＆＃39;没有   键定义。

IdentityUserRoles：EntityType：EntitySet   ＆＃39; IdentityUserRoles＆＃39;基于类型＆＃39; IdentityUserRole＆＃39;没有   键定义。

当我清楚的时候，在所有这些上使用HasKey方法......

请帮忙！

谢谢。

Answer 1

您的代码中有2个DB上下文，因此您的程序最终得到了2个独立的数据库。您的配置适用于其他数据库。如果您想要1个数据库，只需将public DbSet<Expense> Expenses { get; set; }移至ApplicationDbContext。并删除PacificPetExpensesDb课程。

public class ApplicationDbContext : IdentityDbContext<ApplicationUser>
{
    public ApplicationDbContext()
        : base("PacificPetEntities", throwIfV1Schema: false)
    {
    }
    public DbSet<Expense> Expenses { get; set; }

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

}

然后你不再需要OnModelCreating()方法了。

但如果你真的需要2个单独的数据库，那么你的第二个上下文必须继承IdentityDbContext<ApplicationUser>而不是DbContext。

如何在EF 6

1 个答案: