我的數據庫是由我的NHibernate映射文件驅動的。NHibernate映射問題
我有一個範疇類,如下所示:
public class Category {
public Category() : this("") { }
public Category(string name) {
Name = name;
SubCategories = new List<Category>();
Products = new HashSet<Product>();
}
public virtual int ID { get; set; }
public virtual string Name { get; set; }
public virtual string Description { get; set; }
public virtual Category Parent { get; set; }
public virtual bool IsDefault { get; set; }
public virtual ICollection<Category> SubCategories { get; set; }
public virtual ICollection<Product> Products { get; set; }
,這裏是我的映射文件:
<property name="Name" column="Name" type="string" not-null="true"/>
<property name="IsDefault" column="IsDefault" type="boolean" not-null="true" />
<property name="Description" column="Description" type="string" not-null="true" />
<many-to-one name="Parent" column="ParentID"></many-to-one>
<bag name="SubCategories" inverse="true">
<key column="ParentID"></key>
<one-to-many class="Category"/>
</bag>
<set name="Products" table="Categories_Products">
<key column="CategoryId"></key>
<many-to-many column="ProductId" class="Product"></many-to-many>
</set>
,當我嘗試創建我得到以下錯誤數據庫:
失敗:INSERT語句衝突與外鍵相同的表約束「FK9AD976763BF05E2A」。數據庫「CoderForTraders」,表「dbo.Categories」,列'CategoryId'發生衝突。 該聲明已被終止。
我在網上看了一些答案,但沒有發現。 感謝您的幫助
這裏是缺少的部分:
<?xml version="1.0" encoding="utf-8" ?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2" assembly="CBL.CoderForTraders.DomainModel" namespace="CBL.CoderForTraders.DomainModel" default-access="field.camelcase-underscore" default-lazy="true">
<class name="Category" table="Categories" >
<id name="_persistenceId" column="CategoryId" type="Guid" access="field" unsaved-value="00000000-0000-0000-0000-000000000000">
<generator class="assigned" />
</id>
<version name="_persistenceVersion" column="RowVersion" access="field" type="int" unsaved-value="0" />
這對我來說很有意義。我會馬上嘗試! – 2010-04-14 23:11:07
你知道嗎。那樣做了。許多非常感謝傑米 – 2010-04-14 23:16:27
完全有意義。看不到它。 – zoidbeck 2010-04-15 22:38:29