我在用代码优先方法播种数据库时遇到了这个错误。

一个或多个实体的验证失败。有关详细信息，请参阅“EntityValidationErrors”属性。

老实说，我不知道如何检查验证错误的内容。Visual Studio向我展示了它是一个包含8个对象的数组，因此有8个验证错误。

这适用于我以前的模型，但我做了一些更改，我将在下面解释：

我有一个名为Status的枚举，我将其更改为名为Status我将类ApplientsPositionHistory更改为具有同一表的2个外键

对不起，代码太长了，但我必须全部粘贴。异常在以下代码的最后一行中引发。

namespace Data.Model
{  
    public class Position
    {
        [DatabaseGenerated(System.ComponentModel.DataAnnotations.DatabaseGeneratedOption.Identity)]   
        public int PositionID { get; set; }

        [Required(ErrorMessage = "Position name is required.")]
        [StringLength(20, MinimumLength = 3, ErrorMessage = "Name should not be longer than 20 characters.")]
        [Display(Name = "Position name")]              
        public string name { get; set; }

        [Required(ErrorMessage = "Number of years is required")] 
        [Display(Name = "Number of years")]        
        public int yearsExperienceRequired { get; set; }

        public virtual ICollection<ApplicantPosition> applicantPosition { get; set; }
    }

    public class Applicant
    {
        [DatabaseGenerated(System.ComponentModel.DataAnnotations.DatabaseGeneratedOption.Identity)]      
        public int ApplicantID { get; set; }

        [Required(ErrorMessage = "Name is required")] 
        [StringLength(20, MinimumLength = 3, ErrorMessage="Name should not be longer than 20 characters.")]
        [Display(Name = "First and LastName")]
        public string name { get; set; }

        [Required(ErrorMessage = "Telephone number is required")] 
        [StringLength(10, MinimumLength = 3, ErrorMessage = "Telephone should not be longer than 20 characters.")]
        [Display(Name = "Telephone Number")]
        public string telephone { get; set; }

        [Required(ErrorMessage = "Skype username is required")] 
        [StringLength(10, MinimumLength = 3, ErrorMessage = "Skype user should not be longer than 20 characters.")]
        [Display(Name = "Skype Username")]
        public string skypeuser { get; set; }

        public byte[] photo { get; set; }

        public virtual ICollection<ApplicantPosition> applicantPosition { get; set; }
    }

    public class ApplicantPosition
    {
        [Key]
        [Column("ApplicantID", Order = 0)]
        public int ApplicantID { get; set; }

        [Key]
        [Column("PositionID", Order = 1)]
        public int PositionID { get; set; }

        public virtual Position Position { get; set; }

        public virtual Applicant Applicant { get; set; }

        [Required(ErrorMessage = "Applied date is required")] 
        [DisplayFormat(DataFormatString = "{0:d}", ApplyFormatInEditMode = true)]
        [Display(Name = "Date applied")]     
        public DateTime appliedDate { get; set; }

        [Column("StatusID", Order = 0)]
        public int StatusID { get; set; }

        public Status CurrentStatus { get; set; }

        //[NotMapped]
        //public int numberOfApplicantsApplied
        //{
        //    get
        //    {
        //        int query =
        //             (from ap in Position
        //              where ap.Status == (int)Status.Applied
        //              select ap
        //                  ).Count();
        //        return query;
        //    }
        //}
    }

    public class Address
    {
        [StringLength(20, MinimumLength = 3, ErrorMessage = "Country should not be longer than 20 characters.")]
        public string Country { get; set; }

        [StringLength(20, MinimumLength = 3, ErrorMessage = "City  should not be longer than 20 characters.")]
        public string City { get; set; }

        [StringLength(50, MinimumLength = 3, ErrorMessage = "Address  should not be longer than 50 characters.")]
        [Display(Name = "Address Line 1")]     
        public string AddressLine1 { get; set; }

        [Display(Name = "Address Line 2")]
        public string AddressLine2 { get; set; }   
    }

    public class ApplicationPositionHistory
    {
        [DatabaseGenerated(System.ComponentModel.DataAnnotations.DatabaseGeneratedOption.Identity)]
        public int ApplicationPositionHistoryID { get; set; }

        public ApplicantPosition applicantPosition { get; set; }

        [Column("oldStatusID")]
        public int oldStatusID { get; set; }

        [Column("newStatusID")]
        public int newStatusID { get; set; }

        public Status oldStatus { get; set; }

        public Status newStatus { get; set; }

        [StringLength(500, MinimumLength = 3, ErrorMessage = "Comments  should not be longer than 500 characters.")]
        [Display(Name = "Comments")]
        public string comments { get; set; }

        [DisplayFormat(DataFormatString = "{0:d}", ApplyFormatInEditMode = true)]
        [Display(Name = "Date")]     
        public DateTime dateModified { get; set; }
    }

    public class Status
    {
        [DatabaseGenerated(System.ComponentModel.DataAnnotations.DatabaseGeneratedOption.Identity)]
        public int StatusID { get; set; }

        [StringLength(20, MinimumLength = 3, ErrorMessage = "Status  should not be longer than 20 characters.")]
        [Display(Name = "Status")]
        public string status { get; set; }
    }
}

使用系统；使用System.Collections.Generic；使用System.Linq；使用System.Text；使用System.Data.Entity；使用System.IO；命名空间Data.Model{公共类HRContextInitializer:DropCreateDatabaseAlways<HRContext>{受保护的覆盖void Seed（HRContext上下文）{#地区状态已应用状态=新状态（）｛Status=“已应用”｝；状态reviewedByHR=新状态（）｛Status=“人力资源审核”｝；状态approvedByHR=新状态（）｛Status=“已由HR批准”｝；Status rejectedByHR=新状态（）｛Status=“被HR拒绝”｝；分配给技术部门的状态=新状态（）｛Status=“分配给技术部”｝；技术部门批准的状态=新状态（）｛Status=“技术部门批准”｝；技术部门拒绝的状态=新状态（）｛Status=“技术部门拒绝”｝；Status assignedToGeneral Manager=新状态（）｛Status=“分配给General Manager”｝；状态approvedByGeneralManager=新状态（）｛Status=“已由总经理批准”｝；Status rejectedByGeneralManager=新状态（）｛Status=“被总经理拒绝”｝；context.Status.Add（已应用）；context.Status.Add（由HR审查）；context.Status.Add（已由HR批准）；context.Status.Add（被HR拒绝）；context.Status.Add（分配给技术部门）；context.Status.Add（由技术部门批准）；context.Status.Add（被技术部门拒绝）；context.Status.Add（分配给GeneralManager）；context.Status.Add（由GeneralManager批准）；context.Status.Add（被GeneralManager拒绝）；#末端区域#区域位置职位netdeveloper=new职位（）｛name=“.net developer”，所需年经验=5｝；职位javadeveloper=new Position（）｛name=“java developer”，yearsExperienceRequired=5｝；context.Positions.Add（netdeveloper）；context.Positions.Add（javadeveloper）；#末端区域#地区申请人申请人luis=新申请人（）{name=“Luis”，skypeuser=“le.valencia”，电话=“0491732825”，photo=文件.ReadAllBytes（@“C:\Users\LUIS.SIMBIOS\Documents\Visual Studio 2010\Projects\SlnHR\HRRazorForms\Content\pictures\1.jpg”）};申请人john=新申请人（）{name=“John”，skypeuser=“jo.valencia”，电话=“3435343543”，photo=文件.ReadAllBytes（@“C:\Users\LUIS.SIMBIOS\Documents\Visual Studio 2010\Projects\SlnHR\HRRazorForms\Content\pictures\2.jpg”）};context.申请人.添加（luis）；context.申请人.Add（john）；#末端区域#区域应用程序位置ApplicantPosition appicantposition=新的ApplicantPosition（）{申请人=luis，位置=网络开发者，appliedDate=日期时间。今天，状态ID=1};ApplicantPosition appicantposition2=新的ApplicantPosition（）{申请人=john，位置=javadeveloper，appliedDate=日期时间。今天，状态ID=1}; context.ApplicantsPosition.Add（applicantposition）；context.ApplicantsPositions.Add（applicantposition2）；#末端区域context.SaveChanges（）；--->>此处出错}}}