কোডটি প্রথম পদ্ধতির সাথে আমার ডাটাবেসটি সিড করার সময় আমার এই ত্রুটি হচ্ছে।
এক বা একাধিক সত্তার জন্য বৈধতা ব্যর্থ হয়েছে। আরও তথ্যের জন্য 'সত্তাবিশেষকরণের ত্রুটি' সম্পত্তি দেখুন।
সত্যি কথা বলতে কীভাবে বৈধতা ত্রুটির বিষয়বস্তু চেক করতে হয় তা আমি জানি না। ভিজ্যুয়াল স্টুডিও আমাকে দেখায় যে এটি 8 টি অবজেক্ট সহ একটি অ্যারে, তাই 8 বৈধতা ত্রুটি।
এটি আমার আগের মডেলটির সাথে কাজ করছিল, তবে আমি কয়েকটি পরিবর্তন করেছি যা আমি নীচে ব্যাখ্যা করছি:
- আমার স্ট্যাটাস নামে একটি এনাম ছিল, আমি এটিকে স্ট্যাটাস নামক শ্রেণিতে পরিবর্তন করেছি
- আমি ক্লাস আবেদনকারীদের পজিশন ইতিহাসটি পরিবর্তন করে একই টেবিলে 2 টি বিদেশী কী রাখতে পারি
দীর্ঘ কোডের জন্য আমাকে ক্ষমা করুন, তবে আমি এটি সব পেস্ট করতে হবে। ব্যতিক্রমটি নিম্নলিখিত কোডের শেষ লাইনে ফেলে দেওয়া হয়েছে।
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; }
}
}
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data.Entity;
using System.IO;
namespace Data.Model
{
public class HRContextInitializer : DropCreateDatabaseAlways<HRContext>
{
protected override void Seed(HRContext context)
{
#region Status
Status applied = new Status() { status = "Applied" };
Status reviewedByHR = new Status() { status = "Reviewed By HR" };
Status approvedByHR = new Status() { status = "Approved by HR" };
Status rejectedByHR = new Status() { status = "Rejected by HR" };
Status assignedToTechnicalDepartment = new Status() { status = "Assigned to Technical Department" };
Status approvedByTechnicalDepartment = new Status() { status = "Approved by Technical Department" };
Status rejectedByTechnicalDepartment = new Status() { status = "Rejected by Technical Department" };
Status assignedToGeneralManager = new Status() { status = "Assigned to General Manager" };
Status approvedByGeneralManager = new Status() { status = "Approved by General Manager" };
Status rejectedByGeneralManager = new Status() { status = "Rejected by General Manager" };
context.Status.Add(applied);
context.Status.Add(reviewedByHR);
context.Status.Add(approvedByHR);
context.Status.Add(rejectedByHR);
context.Status.Add(assignedToTechnicalDepartment);
context.Status.Add(approvedByTechnicalDepartment);
context.Status.Add(rejectedByTechnicalDepartment);
context.Status.Add(assignedToGeneralManager);
context.Status.Add(approvedByGeneralManager);
context.Status.Add(rejectedByGeneralManager);
#endregion
#region Position
Position netdeveloper = new Position() { name = ".net developer", yearsExperienceRequired = 5 };
Position javadeveloper = new Position() { name = "java developer", yearsExperienceRequired = 5 };
context.Positions.Add(netdeveloper);
context.Positions.Add(javadeveloper);
#endregion
#region Applicants
Applicant luis = new Applicant()
{
name = "Luis",
skypeuser = "le.valencia",
telephone = "0491732825",
photo = File.ReadAllBytes(@"C:\Users\LUIS.SIMBIOS\Documents\Visual Studio 2010\Projects\SlnHR\HRRazorForms\Content\pictures\1.jpg")
};
Applicant john = new Applicant()
{
name = "John",
skypeuser = "jo.valencia",
telephone = "3435343543",
photo = File.ReadAllBytes(@"C:\Users\LUIS.SIMBIOS\Documents\Visual Studio 2010\Projects\SlnHR\HRRazorForms\Content\pictures\2.jpg")
};
context.Applicants.Add(luis);
context.Applicants.Add(john);
#endregion
#region ApplicantsPositions
ApplicantPosition appicantposition = new ApplicantPosition()
{
Applicant = luis,
Position = netdeveloper,
appliedDate = DateTime.Today,
StatusID = 1
};
ApplicantPosition appicantposition2 = new ApplicantPosition()
{
Applicant = john,
Position = javadeveloper,
appliedDate = DateTime.Today,
StatusID = 1
};
context.ApplicantsPositions.Add(appicantposition);
context.ApplicantsPositions.Add(appicantposition2);
#endregion
context.SaveChanges(); --->> Error here
}
}
}
