运行我的第一个 asp.net mvc 应用程序时出现此错误
我认为实体框架会自动创建以 Id 结尾的列名的键?这不是正确的吗?
正如您所看到的,ApplicantPositionID 将是一个包含 2 列作为主键的表,因为它与申请人和职位相关。
在模型生成过程中检测到一个或多个验证错误:
System.Data.Edm.EdmEntityType: : EntityType 'ApplicantImage' has no key defined. Define the key for this EntityType.
System.Data.Edm.EdmEntityType: : EntityType 'ApplicationPositionHistory' has no key defined. Define the key for this EntityType.
System.Data.Edm.EdmEntitySet: EntityType: EntitySet �ApplicantsPositions� is based on type �ApplicantPosition� that has no keys defined.
System.Data.Edm.EdmEntitySet: EntityType: EntitySet �ApplicantImages� is based on type �ApplicantImage� that has no keys defined.
System.Data.Edm.EdmEntitySet: EntityType: EntitySet �ApplicationsPositionHistory� is based on type �ApplicationPositionHistory� that has no keys defined.
错误在这一行抛出:
public ActionResult Index()
{
return View(db.Positions.ToList());
}
我的模型如下:
namespace HRRazorForms.Models
{
public class Position
{
public int PositionID { get; set; }
[StringLength(20, MinimumLength=3)]
public string name { get; set; }
public int yearsExperienceRequired { get; set; }
public virtual ICollection<ApplicantPosition> applicantPosition { get; set; }
}
public class Applicant
{
public int ApplicantId { get; set; }
[StringLength(20, MinimumLength = 3)]
public string name { get; set; }
public string telephone { get; set; }
public string skypeuser { get; set; }
public ApplicantImage photo { get; set; }
public virtual ICollection<ApplicantPosition> applicantPosition { get; set; }
}
public class ApplicantPosition
{
public int ApplicantID { get; set; }
public int PositionID { get; set; }
public virtual Position Position { get; set; }
public virtual Applicant Applicant { get; set; }
public DateTime appliedDate { get; set; }
public int StatusValue { get; set; }
public Status Status
{
get { return (Status)StatusValue; }
set { StatusValue = (int)value; }
}
//[NotMapped]
//public int numberOfApplicantsApplied
//{
// get
// {
// int query =
// (from ap in Position
// where ap.Status == (int)Status.Applied
// select ap
// ).Count();
// return query;
// }
//}
}
public class ApplicantImage
{
public int ApplicantId { get; private set; }
public byte[] Image { get; set; }
}
public class Address
{
[StringLength(20, MinimumLength = 3)]
public string Country { get; set; }
[StringLength(20, MinimumLength = 3)]
public string City { get; set; }
[StringLength(20, MinimumLength = 3)]
public string AddressLine1 { get; set; }
public string AddressLine2 { get; set; }
}
public class ApplicationPositionHistory
{
public ApplicantPosition applicantPosition { get; set; }
public Status oldStatus { get; set; }
public Status newStatus { get; set; }
[StringLength(500, MinimumLength = 10)]
public string comments { get; set; }
public DateTime dateModified { get; set; }
}
public enum Status
{
Applied,
AcceptedByHR,
AcceptedByTechnicalDepartment,
InterviewedByHR,
InterviewedByTechnicalDepartment,
InterviewedByGeneralManager,
AcceptedByGeneralManager,
NotAccepted
}
}