Question

我尝试使用EF6代码优先禁用级联删除。

protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
    modelBuilder.Conventions.Remove<PluralizingTableNameConvention>();
    modelBuilder.Conventions.Remove<OneToManyCascadeDeleteConvention>();
    modelBuilder.Conventions.Remove<ManyToManyCascadeDeleteConvention>();
}

当我尝试删除表中的记录时，我收到错误

＆＃34;无法删除主键值，因为引用了此键关键仍然存在。 [外键约束名称= FK_dbo.OperatorActivity_dbo.Operator_OperatorId]＆＃34;

我的模特

public class OperatorActivity
{
    public Guid Id { get; set; }
    public DateTime StartDate { get; set; }
    public DateTime? EndDate { get; set; }
    public bool Synched { get; set; }

    public virtual Station Station { get; set; }
    public Guid StationId { get; set; }

    public virtual Operator Operator { get; set; }
    public Guid OperatorId { get; set; }
}

public class Operator
{
    public Guid Id { get; set; }
    public string Name { get; set; }
    public string LastName { get; set; }
    public string Login { get; set; }
    public byte[] Password { get; set; }

    public virtual  Network Network { get; set; }

    public virtual ICollection<Station> Stations { get; set; }
    public virtual ICollection<OperatorActivity> Activities { get; set; }
    public virtual ICollection<Refill> Refills { get; set; }

    public override string ToString()
    {
        return this.Name + " " + this.LastName;
    }
}

如何禁用级联删除？

Answer 1

虽然在保留子行的同时删除引用的（父）行是不合逻辑的，但是为了允许这样做，您应该删除外键约束。

在 MySQL 数据库中运行：

alter table OperatorActivity drop 
foreign key FK_dbo.OperatorActivity_dbo.Operator_OperatorId

在 SQL Server ：

中

alter table OperatorActivity drop 
constraint FK_dbo.OperatorActivity_dbo.Operator_OperatorId

禁用级联删除EF6

1 个答案: