[英]NHibernate + Fluent NHibernate exception
Problem : 问题 :
There are searches that can be stored in the DB. 有些搜索可以存储在DB中。 Each search has a collection of filters. 每个搜索都有一组过滤器。 Also there are roles. 还有角色。 Each role may have (nullable column) a default search assigned to it. 每个角色可以(可空列)分配一个默认搜索。 Also, each search is visible to zero or many roles (many-to-many relationship). 此外,每个搜索对零或多个角色(多对多关系)可见。
When I try to access the search filters, NH tries to access filters.DefaultSearchId, which doesn't exist in filters table. 当我尝试访问搜索过滤器时,NH尝试访问过滤器表中不存在的filters.DefaultSearchId。
DB: D B:
CREATE TABLE [dbo].[Searches]
(
Id int identity(1,1) primary key,
Description nvarchar(2000) not null
);
CREATE TABLE [dbo].[Filters]
(
Id int identity(1,1) primary key,
Description nvarchar(2000) not null,
SearchId int not null references Searches(Id)
);
CREATE TABLE [dbo].[Roles]
(
Id int identity(1,1) primary key,
Name nvarchar(255) not null,
DefaultSearchId int null references Searches(Id)
);
CREATE TABLE [dbo].[SearchesRoles]
(
SearchId int not null references Searches(Id),
RoleId int not null references Roles(Id)
);
Entities: 实体:
public class Search {
public virtual int Id { get; set; }
public virtual string Description { get; set; }
public virtual ICollection<Filter> Filters { get; set; }
public virtual ICollection<Role> Roles { get; set; }
}
public class Filter {
public virtual int Id { get; set; }
public virtual string Description { get; set; }
public virtual Search Search { get; set; }
}
public class Role {
public virtual int Id { get; set; }
public virtual string Name { get; set; }
public virtual Search DefaultSearch { get; set; }
}
Mappings: 映射:
public class SearchMap : ClassMap<Search>{
public SearchMap() {
Table("Searches");
Id(x => x.Id).GeneratedBy.Identity();
Map(x => x.Description);
HasMany(x => x.Filters).Inverse().Cascade.All().AsBag();
HasManyToMany(x => x.Roles).Table("SearchesRoles").ParentKeyColumn("SearchId").ChildKeyColumn("RoleId");
}
}
public class FilterMap : ClassMap<Filter> {
public FilterMap() {
Table("Filters");
Id(x => x.Id).GeneratedBy.Identity();
Map(x => x.Description);
References(x => x.Search).Column("SearchId");
}
}
public class RoleMap : ClassMap<Role> {
public RoleMap() {
Table("Roles");
Id(x => x.Id).GeneratedBy.Identity();
Map(x => x.Name);
References(x => x.DefaultSearch).Column("DefaultSearchId");
}
}
Code: 码:
class Program {
static void Main() {
var sessionFactory = CreateSessionFactory();
using (var session = sessionFactory.OpenSession()) {
var search = session.Get<Search>(1);
foreach (var filter in search.Filters) {
Console.WriteLine(filter);
}
}
}
static ISessionFactory CreateSessionFactory(){
string connectionString = @"server=.\sql2008; user id = sa; pwd=1; database = nhbug;";
return Fluently.Configure()
.Database(MsSqlConfiguration.MsSql2008.ConnectionString(connectionString))
.Mappings(m=>m.FluentMappings.AddFromAssembly(Assembly.GetExecutingAssembly())).BuildSessionFactory();
}
}
ERROR: 错误:
When accessing the search.Filters property, NHibernate tries to access Filters.DefaultSearchId db column which is not supposed to be there. 当访问search.Filters属性,NHibernate的尝试访问这是不应该在那里Filters.DefaultSearchId数据库列。 This column exists in Roles table but not in filters. 此列存在于Roles表中,但不存在于过滤器中。
QUESTION: 题:
Is it invalid configuration, Fluent NHibernate or NHibernate bug? 是配置无效,Fluent NHibernate还是NHibernate错误?
I'm using SQL Server 2008 R2, NHibernate 2.1.2 and Fluent NHibernate 1.1.0.685, although this issue exists in NHibernate 3 beta 2 as well. 我正在使用SQL Server 2008 R2,NHibernate 2.1.2和Fluent NHibernate 1.1.0.685,尽管这个问题也存在于NHibernate 3 beta 2中。
Thank you. 谢谢。
UPDATE: Here is the actual SQL generated 更新:这是实际生成的SQL
UPDATE2: CDMDOTNET, same error, same sql, unfortunately. UPDATE2:CDMDOTNET,同样的错误,同样的sql,不幸的是。
UPDATE3: Actual exception 更新3: 实际例外
UPDATE4: This is a particular use case of a general bug: Entity references other entities as 'many-to-many' and on the other side of 'many-to-many' assoc. 更新4:这是一个常见错误的特定用例:实体引用其他实体为“多对多”,另一方面引用“多对多”关联。 the other entity references the source entity (DefaultQuery in my case). 另一个实体引用源实体(在我的例子中是DefaultQuery)。 NH goes nuts when accessing any child collection (one-to-many) of a source entity (Filters in my case). 在访问源实体的任何子集合(一对多)时,NH会疯狂(在我的情况下为过滤器)。
UPDATE5: Sample data 更新5: 样本数据
UPDATE6: XML issued by Fluent NHibernate UPDATE6: Fluent NHibernate发布的XML
Update the HasMany mapping on the SearchMap to include the KeyColumn(): 更新SearchMap上的HasMany映射以包含KeyColumn():
HasMany(x => x.Filters) .KeyColumn("SearchId") .Inverse().Cascade.All().AsBag(); HasMany(x => x.Filters) .KeyColumn(“SearchId”)。 Inverse()。Cascade.All()。AsBag();
You didn't specify the column name for the Filters bag. 您没有指定Filters包的列名。 It should be set to SearchId. 它应该设置为SearchId。
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