我有一个包含2个项目的解决方案，一个asp.net核心mvc 1.0.1和一个带有EF6的.NET 4.6.1类库，它包含我的实体，域模型，抽象和视图模型。我在我的asp.net核心项目中添加了类库作为参考。我将我的类库项目设置为我的启动项目并启用迁移甚至成功添加。但是一旦我做了Update-Database，我得到一个包含没有匹配元素的错误序列。所以我切换并创建了相同的项目，但没有拆分成类库和Web项目，它现在是一个asp.net mvc5项目，在那里，我甚至无法在启用迁移后添加迁移。两个计数我添加了mysql.data.entity 6.9.9并按照mysql本身的说明和互联网上的其他丰富指令但我仍然得到相同的错误。
这是我的dbcontext：
public class SchoolDb : IdentityDbContext<ApplicationUser>
{
public static string ConnString { get; set; } =
"Server=localhost; Database=schooldb; Uid=root; Pwd=l1nux43va;";
public SchoolDb() : base("SchoolDb")
{
}
public static SchoolDb Create()
{
return new SchoolDb();
}
public DbSet<Attendance> Attendance { get; set; }
public DbSet<Class> Classes { get; set; }
public DbSet<Student> Students { get; set; }
public DbSet<Result> Results { get; set; }
public DbSet<Teacher> Teachers { get; set; }
public DbSet<MedicalHistory> MedicalHistories { get; set; }
public DbSet<School> Schools { get; set; }
public DbSet<Subject> Subjects { get; set; }
public DbSet<Payment> Payments { get; set; }
public DbSet<SchoolSession> Sessions { get; set; }
public DbSet<TermWork> TermWorks { get; set; }
public DbSet<Staff> Staff { get; set; }
public DbSet<ScoreGrade> ScoreGrades { get; set; }
public DbSet<LessonPlan> LessonPlans { get; set; }
public DbSet<Hostel> Hostels { get; set; }
public DbSet<Guardian> Guardians { get; set; }
public DbSet<BehaviourActivity> BehaviourActivities { get; set; }
public DbSet<Rating> Ratings { get; set; }
public DbSet<TermWorkType> TermWorkTypes { get; set; }
public DbSet<EntranceExam> EntranceExam { get; set; }
public DbSet<EntranceExamCandidate> EntranceExamCandidate { get; set; }
public DbSet<EntranceExamSubject> EntranceExamSubject { get; set; }
protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
base.OnModelCreating(modelBuilder);
modelBuilder.Conventions.Remove<ManyToManyCascadeDeleteConvention>();
modelBuilder.Conventions.Remove<OneToManyCascadeDeleteConvention>();
modelBuilder.Conventions.Remove<PluralizingTableNameConvention>();
//fluent annotations
modelBuilder.Entity<Attendance>()
.HasMany(a => a.Students);
modelBuilder.Entity<Attendance>()
.HasRequired(a => a.FormTeacher);
modelBuilder.Entity<BehaviourActivity>()
.HasRequired(b => b.Rating)
.WithOptional(r => r.BehaviourActivity);
modelBuilder.Entity<Class>()
.HasRequired(c => c.FormTeacher);
modelBuilder.Entity<Class>()
.HasOptional(c => c.Subjects).WithOptionalPrincipal();
modelBuilder.Entity<Club>()
.HasMany(c => c.Students);
modelBuilder.Entity<EntranceExam>()
.HasMany(e => e.EntranceExamCandidate)
.WithRequired(e => e.EntranceExam).WillCascadeOnDelete(true);
modelBuilder.Entity<EntranceExam>()
.HasMany(e => e.ExamSubjects)
.WithRequired(s => s.EntranceExam);
modelBuilder.Entity<EntranceExamCandidate>()
.HasMany(e => e.ExamSubjects)
.WithRequired(s => s.EntranceExamCandidate);
modelBuilder.Entity<Guardian>()
.HasMany(g => g.Students)
.WithRequired(s => s.Guardian);
modelBuilder.Entity<Hostel>()
.HasMany(h => h.Students);
modelBuilder.Entity<Hostel>()
.HasRequired(h => h.Patron);
modelBuilder.Entity<MedicalHistory>()
.HasMany(m => m.Disabilities)
.WithRequired(d => d.MedicalHistory);
modelBuilder.Entity<MedicalHistory>()
.HasMany(m => m.Illnesses)
.WithRequired(i => i.MedicalHistory);
modelBuilder.Entity<MedicalHistory>()
.HasMany(m => m.Allergies)
.WithRequired(a => a.MedicalHistory);
modelBuilder.Entity<Payment>()
.HasMany(p => p.PaymentTypes);
modelBuilder.Entity<Payment>()
.HasRequired(p => p.SchoolSession);
modelBuilder.Entity<Result>()
.HasRequired(r => r.Student);
modelBuilder.Entity<Result>()
.HasRequired(r => r.SchoolSession);
modelBuilder.Entity<Result>()
.HasRequired(r => r.Subject);
modelBuilder.Entity<School>()
.HasMany(s => s.Students);
modelBuilder.Entity<School>()
.HasMany(s => s.Teachers);
modelBuilder.Entity<School>()
.HasMany(s => s.Staff)
.WithRequired(s => s.School);
modelBuilder.Entity<SchoolSession>()
.HasRequired(ss => ss.School);
modelBuilder.Entity<Student>()
.HasMany(s => s.Payments)
.WithRequired(p => p.Student);
//modelBuilder.Entity<Student>()
// .HasMany(s => s.Subjects)
// .WithMany(s => s.Students)
// .Map(m =>
// {
// m.MapLeftKey("StudentId");
// m.MapRightKey("SubjectId");
// m.ToTable("StudentsSubjects");
// });
modelBuilder.Entity<Student>()
.HasOptional(s => s.MedicalHistory)
.WithRequired(m => m.Student);
modelBuilder.Entity<Student>()
.HasRequired(s => s.Class);
modelBuilder.Entity<Subject>()
.HasOptional(s => s.ScoreGrade)
.WithOptionalPrincipal(sg => sg.Subject);
modelBuilder.Entity<Teacher>()
.HasMany(t => t.LessonPlans)
.WithRequired(l => l.Teacher);
//modelBuilder.Entity<Teacher>()
// .HasMany(t => t.Subjects)
// .WithMany(s => s.Teachers)
// .Map(m =>
// {
// m.MapLeftKey("TeacherId");
// m.MapRightKey("SubjectId");
// m.ToTable("TeachersSubjects");
// });
modelBuilder.Entity<TermWork>()
.HasRequired(t => t.Student);
modelBuilder.Entity<TermWork>()
.HasRequired(t => t.SchoolSession);
modelBuilder.Entity<TermWork>()
.HasRequired(t => t.Subject);
modelBuilder.Entity<TermWork>()
.HasRequired(t => t.TermWorkType)
.WithOptional(tt => tt.TermWork);
}
}
任何人都可以指导我修复此错误需要做些什么！？