剔除功能NHibernate架构生成一些表
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20-09-2019 - |
题
我有一个传统的DB一些现有的asp.net成员资格和角色表,我将它们映射与功能NHibernate新的实体。
我也直接从功能NHibernate生成的模式,然后我手动调整所生成的SQL脚本以排除现有的表。
是否有可能以连贯NHibernate说从一代某些表排除?
解决方案
SchemaAction.None()
在类映射。
其他提示
另一个选择是创建一个属性,说
public class DoNotAutoPersistAttribute : Attribute
{
}
然后在AutoPersistenceModelGenerator,你可以检查AddEntityAssembly的Where子句中这个属性。
我与属性+约定管理这样的:
public enum SchemaAction
{
None
}
[Serializable]
[AttributeUsage(AttributeTargets.Class)]
public class SchemaActionAttribute : Attribute
{
private readonly SchemaAction schemaAction = SchemaAction.None;
public SchemaActionAttribute()
{
}
public SchemaActionAttribute(SchemaAction schemaAction)
{
this.schemaAction = schemaAction;
}
public SchemaAction GetSchemaAction()
{
return schemaAction;
}
}
/// <summary>
/// overrides the default action for entities when creating/updating the schema
/// based on the class having a Schema attribute (<see cref="SchemaActionAttribute" />)
/// </summary>
public class SchemaActionConvention : IClassConvention
{
public void Apply(IClassInstance instance)
{
object[] attributes = instance.EntityType.GetCustomAttributes(true);
foreach (object t in attributes)
{
if (t is SchemaActionAttribute)
{
var a = (SchemaActionAttribute) t;
switch(a.GetSchemaAction())
{
case SchemaAction.None:
instance.SchemaAction.None();
return;
default: throw new ApplicationException("That schema action:" + a.GetSchemaAction().ToString() + " is not currently implemented.");
}
}
}
}
}
...
[SchemaAction(SchemaAction.None)]
public class TextItem : Entity
...
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