Asp.Net MVC 5 Seed() 方法 - 数据验证错误

Question

在我的 Configuration.cs 的 Seed() 方法中，我在添加数据时遇到了一些错误：

Validation failed for one or more entities. See 'EntityValidationErrors' property for more details.

堆栈跟踪

at System.Data.Entity.Internal.InternalContext.SaveChanges()

我的带有种子数据的 Configuration.cs 文件：

namespace MarginWorkbenchNG.Migrations
{
using System;
using System.Data.Entity;
using System.Data.Entity.Migrations;
using System.Linq;
using System.Collections.Generic;
using Microsoft.AspNet.Identity;
using Microsoft.AspNet.Identity.EntityFramework;

internal sealed class Configuration : DbMigrationsConfiguration<MarginWorkbenchNG.Models.ApplicationDbContext>
{
	public Configuration()
	{
		AutomaticMigrationsEnabled = true;
		AutomaticMigrationDataLossAllowed = true;   // added - BM:
		ContextKey = "MarginWorkbenchNG.Models.ApplicationDbContext";
	}

	protected override void Seed(MarginWorkbenchNG.Models.ApplicationDbContext context)
	{

		var hasher = new PasswordHasher();

		// **** Causing "Validation failed" errors on line 80 of AccountController.cs ****
		context.Roles.AddOrUpdate(
			new IdentityRole { Name = "SystemAdministrator" }                
		);
		context.Users.AddOrUpdate(                
			new Models.ApplicationUser { Company = "ICAP", EmailConfirmed = true, FirstName = "Admin", LastName = "Demo", UserName = "admin@rzr.com", Email = "admin@rzr-risk.com", PasswordHash = hasher.HashPassword("test123") },
			new Models.ApplicationUser { Company = "ICAP", EmailConfirmed = true, FirstName = "Trader", LastName = "Demo", UserName = "trade@rzr.com", Email = "trade@rzr.com", PasswordHash = hasher.HashPassword("test123") }
		);

		context.SaveChanges();

	}
}
}

我在IdentityModels.cs 中对我的ApplicationUser 类进行了一些小的更改，并且我当然可以在修改此类时看到表架构更改（即我将自动迁移设置为true）。但是，Seed() 方法失败了。

public class ApplicationUser : IdentityUser
{
  // added Company, Name to profile - BM:
  public string Company { get; set; }
  public string FirstName { get; set; }
  public string LastName{ 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;
  }
}

仅供参考：在某些时候，当AppNetUsers 表为空时，种子数据成功。

但是，现在完全不一致。我已经删除了AppNetUsers 中的记录，但是 Seed() 方法仍然失败。我不明白。

**** 更新 **** 如果我在 web.config 文件中更改数据库名称，我可以强制它创建一个全新的数据库 - 并且 seed() 数据工作正常！

 <connectionStrings>
<add name="DefaultConnection" connectionString="Data Source=MyDevBox;Initial Catalog=TestDB2;Integrated Security=True" providerName="System.Data.SqlClient" />  

但是，当我尝试重新创建数据库时，我仍然不理解上述 Seed() 方法中的异常？

谢谢你， 鲍勃

Answer 1

不要将 Identity 对象直接添加到您的 DbContext，而是使用角色管理器和用户管理器：

protected override void Seed(MarginWorkbenchNG.Models.ApplicationDbContext context)
{
    var userManager = new ApplicationUserManager(new UserStore<Models.ApplicationUser>(context));
    var roleManager = new RoleManager<IdentityRole>(new RoleStore<IdentityRole>(context));

    if (!roleManager.RoleExists("SystemAdministrator"))
        roleManager.Create(new IdentityRole("SystemAdministrator"));

    var adminUser = userManager.FindByName("admin@rzr.com");
    if (adminUser == null)
    {
         adminUser = new ApplicationUser
         {
             Company = "ICAP", 
             EmailConfirmed = true, 
             FirstName = "Admin", 
             LastName = "Demo", 
             UserName = "admin@rzr.com", 
             Email = "admin@rzr-risk.com"
         };
         userManager.Create(adminUser,"thePassword");
    }
    // adding roles to the user if necessary 
    if (!userManager.IsInRole(adminUser.Id, "SystemAdministrator"))
        userManager.AddToRole(adminUser.Id, "SystemAdministrator");

}