種子不適用EF 4.1

我有我在asp.net mvc教程的幫助下創建的以下代碼。這些在我稱爲Model的不同類庫中。我使用名爲HRContext的連接字符串在類庫中創建了一個app.config。同樣在webproject上，我創建了相同的連接字符串。種子不適用EF 4.1

當我運行項目時，我把斷點和Seed方法從不執行，但OnModelCreating正在執行。

我收到了一個異常，表示dbo.Position不存在於視圖中。

Exception Details: System.Data.SqlClient.SqlException: Invalid object name 'dbo.Position'. 



Line 21:    var positions = unitOfWork.PositionRepository.Find(p => p.PositionID != null); 
Line 22: 
Line 23:    return View(positions.ToList()); 
Line 24:   } 








public class HRContextInitializer : DropCreateDatabaseAlways<HRContext> 
    { 
     protected override void Seed(HRContext context) 
     { 
      Position netdeveloper = new Position() { name = ".net developer", yearsExperienceRequired = 5 }; 
      Position javadeveloper = new Position() { name = "java developer", yearsExperienceRequired = 5 }; 

      byte[] johnImage = File.ReadAllBytes(@"\Content\Photos\1.jpg"); 
      byte[] luisImage = File.ReadAllBytes(@"\Content\Photos\2.jpg"); 

      Applicant luis = new Applicant() 
      { 
       name = "Luis", 
       skypeuser = "le.valencia", 
       telephone = "0491732825", 
       photo = luisImage 
      }; 

      Applicant john = new Applicant() 
      { 
       name = "John", 
       skypeuser = "jo.valencia", 
       telephone = "3435343543", 
       photo = johnImage 
      }; 


      ApplicantPosition appicantposition = new ApplicantPosition() 
      { 
       Applicant = luis, 
       Position = netdeveloper, 
       appliedDate = DateTime.Today, 
       Status = Status.Applied 
      }; 

      ApplicantPosition appicantposition2 = new ApplicantPosition() 
      { 
       Applicant = john, 
       Position = javadeveloper, 
       appliedDate = DateTime.Today, 
       Status = Status.Applied 
      }; 

      context.Positions.Add(netdeveloper); 
      context.Positions.Add(javadeveloper); 
      context.Applicants.Add(luis); 
      context.Applicants.Add(john); 
      context.ApplicantsPositions.Add(appicantposition); 

      context.SaveChanges(); 
     } 
    } 




public class HRContext : DbContext 
    { 
     public DbSet<Position> Positions { get; set; } 
     public DbSet<Applicant> Applicants { get; set; } 
     public DbSet<ApplicantPosition> ApplicantsPositions { get; set; } 
     public DbSet<ApplicationPositionHistory> ApplicationsPositionHistory { get; set; } 

     protected override void OnModelCreating(DbModelBuilder modelBuilder) 
     { 
      modelBuilder.Entity<Position>().ToTable("Position"); 
      modelBuilder.Entity<Applicant>().ToTable("Applicant"); 
      modelBuilder.Entity<ApplicantPosition>().ToTable("ApplicantPosition"); 
      modelBuilder.Entity<ApplicationPositionHistory>().ToTable("ApplicationsPositionHistory"); 

      modelBuilder.Entity<Position>().Property(c => c.name).IsRequired(); 
      modelBuilder.Entity<Applicant>().Property(c => c.name).IsRequired(); 
      modelBuilder.Entity<ApplicantPosition>().Property(c => c.appliedDate).IsRequired(); 

      base.OnModelCreating(modelBuilder); 
     } 
    }

來源

2011-10-17 Luis Valencia

您需要告知EF將Database.SetInitializer方法用於您的自定義初始化程序。最好在你的應用程序開始時調用它（如果你使用的是MVC，那麼在Application_Start中）。但是，你應該只調用一次，您訪問的上下文首次

protected void Application_Start() 
{ 
    ... 
    Database.SetInitializer(new HRContextInitializer()); 
    ... 
}

來源

2011-10-17 09:49:32 nemesv

在你HRContext類之前，你需要設置初始化數據庫：

protected override void OnModelCreating(DbModelBuilder modelBuilder) 
{ 
    Database.SetInitializer(new HTContextInitializer()); 
}

來源

2011-10-17 09:51:56

種子不適用EF 4.1

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