Maks's questions

不是第一个数据库，但是遇到了问题，看不懂。

模型：

public class TemplateWork
    {
        public int Id { get; set; }
        /// <summary>
        /// Родительский объект
        /// </summary>
        public int? ParentId { get; set; }
        public TemplateWork? Parent { get; set; }
        public string Name { get; set; } = string.Empty;

        public IEnumerable<TemplateWork> Stages { get; set; }

        public TemplateWork() => Stages = new List<TemplateWork>(); 
    }

型号配置：

public class TemplateWorkEFConfiguration : IEntityTypeConfiguration<TemplateWork>
{
    public void Configure(EntityTypeBuilder<TemplateWork> builder)
    {
        builder.ToTable("TemplateWorks");

        builder
            .HasOne(o => o.Parent)
            .WithMany(s => s.Stages)
            .HasForeignKey(k => k.ParentId)
            .OnDelete(DeleteBehavior.SetNull);            
    }

}

BD上下文

public class ApplicationDBContext : DbContext
    {
        public ApplicationDBContext()            
        {           
            Database.EnsureCreated();
        }

        public DbSet<AppUser> AppUsers { get; set; } = null!;
        public DbSet<TemplateWork> TemplateWorks { get; set; } = null!;

        protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder) 
        {
            optionsBuilder.UseSqlServer("Server=.............");             
        }

        protected override void OnModelCreating(ModelBuilder modelBuilder)
        {
            modelBuilder.ApplyConfiguration(new TemplateWorkEFConfiguration());
        }
   }

未创建表。此外，当我包含公共 DbSet TemplateWorks 时，没有创建表，没有它一切正常。执行时不抛出异常。其他连接模型（2张桌子上的真相） - 解决。帮助我理解......