IManyToManyCollectionInstance约定创建额外的表
本文关键字:约定 创建 IManyToManyCollectionInstance | 更新日期: 2023-09-27 18:08:50
我有一个流畅的基于NHibernate约定的映射,在我的StockPurchase
实体和我的StockSale
实体之间有一个多对多的关系。
我创建了以下约定:
public class ManyToManyLinkedTableConvention : IHasManyToManyConvention
{
public void Apply(FluentNHibernate.Conventions.Instances.IManyToManyCollectionInstance instance)
{
var naming = new NamingStrategy();
if (StringComparer.InvariantCultureIgnoreCase.Compare(instance.EntityType.Name, instance.OtherSide.EntityType.Name) > 0)
{
instance.Table(naming.Quote(
string.Format(
"{0}To{1}",
Inflector.Inflector.Pluralize(instance.EntityType.Name),
Inflector.Inflector.Pluralize(instance.ChildType.Name))));
instance.Not.Inverse();
}
else
{
instance.Inverse();
}
}
}
当我使用hbm2ddl函数时,它完全按照我想要的方式构建表:
CREATE TABLE "StockSalesToStockPurchases"
(
stocksale_id uuid NOT NULL,
stockpurchase_id uuid NOT NULL,
CONSTRAINT fkee886e07285f29f1 FOREIGN KEY (stockpurchase_id)
REFERENCES "StockPurchases" (stockpurchaseid) MATCH SIMPLE
ON UPDATE NO ACTION ON DELETE NO ACTION,
CONSTRAINT fkee886e073b8be3d9 FOREIGN KEY (stocksale_id)
REFERENCES "StockSales" (stocksaleid) MATCH SIMPLE
ON UPDATE NO ACTION ON DELETE NO ACTION
);
…奇怪的是,它还创建了第二个表:
CREATE TABLE stockpurchasestostocksales
(
stockpurchase_id uuid NOT NULL,
stocksale_id uuid NOT NULL,
CONSTRAINT fk396e0343285f29f1 FOREIGN KEY (stockpurchase_id)
REFERENCES "StockPurchases" (stockpurchaseid) MATCH SIMPLE
ON UPDATE NO ACTION ON DELETE NO ACTION,
CONSTRAINT fk396e03433b8be3d9 FOREIGN KEY (stocksale_id)
REFERENCES "StockSales" (stocksaleid) MATCH SIMPLE
ON UPDATE NO ACTION ON DELETE NO ACTION
);
它为什么这样做,我如何阻止它?
好了,我知道怎么做了。谁来告诉我有没有更好的办法。
public class ManyToManyLinkedTableConvention : IHasManyToManyConvention
{
public void Apply(IManyToManyCollectionInstance instance)
{
var naming = new NamingStrategy();
string firstName;
string secondName;
if (StringComparer.InvariantCultureIgnoreCase.Compare(instance.EntityType.Name, instance.OtherSide.EntityType.Name) >
0)
{
firstName = instance.EntityType.Name;
secondName = instance.OtherSide.EntityType.Name;
}
else
{
secondName = instance.EntityType.Name;
firstName = instance.OtherSide.EntityType.Name;
instance.Not.Inverse();
}
instance.Table(naming.Quote(
string.Format(
"{0}To{1}",
Inflector.Inflector.Pluralize(firstName),
Inflector.Inflector.Pluralize(secondName))));
}
}