在nhibernate中从INSERT命令中排除属性 [英] Exclude property from INSERT command in nhibernate
问题描述
我有一个带有属性的实体,该属性希望是只读的-这意味着当我将此实体插入数据库时,SqlServer会自动生成该属性的值,因此我需要nhibernate在执行INSERT命令时忽略此属性,但要进行检索选择实体时使用它.
I have an entity with a property which I wish to be readonly - meaning that when I insert this entity to the DB, SqlServer will generate the property's value automatically so I need nhibernate to ignore this property when executing the INSERT command but retrieve it when selecting the entity.
重要说明:此属性不是ID
!我不希望NHibernate使用生成器对其进行初始化,而SqlServer会自行完成.
Important note: this property isn't ID
! I don't want NHibernate to initialize it using generator, SqlServer will do it by itself.
另外要注意的是:我使用配置映射,所以请不要使用流利的映射解决方案.
And another note: I use configuration mapping so no fluent mapping solutions please.
推荐答案
该功能受支持.有两个属性:
That functionality is supported. There are two attributes:
<property name="GeneratedBySql" insert="false" update="false" />
即使参考映射也可以应用
The same could be applied even for reference mapping
<many-to-one name="ReferenceGeneratedBySql" insert="false" update="false" />
如果我们要使用按代码映射,我们的位置确实相同,请参见:
If we want to use Mapping-by-Code we do have the same in places, see:
摘录片段:
Property(x => x.Property, m =>
{
m.Column("columnName");
...
m.Update(false);
m.Insert(false);
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