CodeFirst 级联删除问题

codefirst涉及到级联删除时可能会报下面的错误：

table 'TableName' may cause cycles or multiple cascade paths. Specify ON DELETE NO ACTION or ON UPDATE NO ACTION, or modify other FOREIGN KEY constraints.

此时可以在OnModelCreating方法中设置不创建级联删除约束（实际开发中需要我手动实现级联删除）：

protected override void OnModelCreating(DbModelBuilder modelBuilder)
        {
            modelBuilder.Entity<Appointment>().HasRequired(a => a.Sponsor).WithMany(u => u.SpoAppointments).WillCascadeOnDelete(false);
            modelBuilder.Entity<Appointment>().HasRequired(a => a.Recipient).WithMany(u => u.RecAppointments).WillCascadeOnDelete(false);
        }

CodeFirst 级联删除问题

原文：http://blog.csdn.net/mx5721/article/details/44174399