CREATE TABLE ConfigurationItem
(
OID BIGINT NOT NULL
,ParentItemOID BIGINT
);
ALTER TABLE ConfigurationItem ADD CONSTRAINT PK_CONFIGURATIONITEM PRIMARY KEY (OID);
ALTER TABLE ConfigurationItem ADD CONSTRAINT FK_CONFIGURATIONITEM_PARENTITEMOID FOREIGN KEY (ParentItemOID ) REFERENCES CONFIGURATIONITEM(OID);
每次获取数据 ConfigurationItem 时,我都想获取父 ConfigurationItem 和子 ConfigurationItems 列表,并且没有递归。
这是创建的实体
[Table("ConfigurationItem", Schema = "dbo")]
public partial class ConfigurationItem : TaggableItem
{
public Int64 OID { get; set; }
public Int64? ParentItemOID { get; set; }
[ForeignKey("ParentItemOID")]
public ConfigurationItem Parent;
[InverseProperty("ParentItemOID")]
//Not a virtual because it is need to be marshalled via WCF
public List<ConfigurationItem> Children { get; set; }
}
我不能让它工作。
发生以下错误示例:
InnerException: System.Data.SqlClient.SqlException
HResult=-2146232060
Message=Invalid column name 'ConfigurationItem_OID'.
Source=.Net SqlClient Data Provider
ErrorCode=-2146232060
Class=16
LineNumber=32
Number=207
Procedure=""
Server=localhost
State=1
在实体框架中进行这项工作的正确方法是什么?