有一个简单的模型:
public class Node
{
public long Id { get; set; }
public virtual Node Parent { get; set; }
}
以下地图代码将引发异常:
public class NodeContext : DbContext
{
public DbSet<Node> Nodes { get; set; }
protected override void OnModelCreating(ModelBuilder modelBuilder)
{
base.OnModelCreating(modelBuilder);
modelBuilder.Entity<Node>().HasOptional(n => n.Parent).WithMany().IsIndependent().Map(m => m.MapKey(p => p.Id, "ParentId"));
}
}
可能是因为它不能自我引用自定义外键名吗?
答案 0 :(得分:1)
我也这样做,但我不依赖EF获取正确的密钥而且我自己做。所以我的Node
课程如下所示:
public class Node
{
public int Id {get;set;}
public int ParentId {get;set;}
public virutal Node Parent {get;set;}
public virtual ICollection<Node> Children {get;set;}
}
然后模型构建器的设置如下:
builder.Entity<Node>().HasKey(x => x.Id);
builder.Entity<Node>()
.HasOptional(s => s.Parent)
.WithMany(c => c.Children)
.HasForeignKey(s => s.ParentId);
builder.Entity<Node>().ToTable("Node");