nhibernate

问题 I'm trying to update a single column in the table. No UPDATE issued whatsoever (checked using SQL Profiler). No errors. Class mapping has dynamic-update="true" . No versioning enabled on the class. Flush mode Commit. Property mapped without any insert/update modifiers ( <property name="Deleted" /> ). Property is auto-implemented ( public virtual bool Deleted { get;set;} ). NH 3.3.0, .NET 4, x64. using (var transaction = this._session.BeginTransaction()) { try { var order = this.session.Load

问题 I tried to use NHibernate with SQLite, version=1.0.74.0 for .NET 4 and 32 bit. I use a 64bit WIN7, but build the application in x86 mode (default in VS2010 express). When I use the same SQLite as a standalone application it works fine, but when I try to use it with NHibernate it throws BadImageFormatExcepion I debugged a bit NHibernate and the Exception is thrown at the folllowing statement System.Type.GetType("System.Data.SQLite.SQLiteConnection, System.Data.SQLite"); Any chances somebody

问题 I get an entity 'A' using getHibernateTemplate().get(A.class, 100) from the database. Lets say this entity 'A' has a property 'value' 200 in the database. Now, in my Java code, I change a property for this entity. lets say, I change the 'value' property to '500' and then add it to some list. Now, If I again do getHibernateTemplate().get(A.class, 100) for the same Entity, I am getting the updated entity(that has a value of 500). How do I force hibernate to get me the entity from the database,

问题 Can someone explain me what are NHibernate SubQueryExpression based queries. Any links with concrete examples are very welcome. Thanks Update: Let's say that I have one entity named Beach. That beach can have many images. I want to select Beach entity and it;s first image from Images collection. I want to carry arround only that selected image object, or if I select only second object to carry only that object. I do not want to access like Images.First() cause that will initialize all

问题 I'm trying to decouple the orderby on a queryover call and this doesn't compile protected static void AddOrder<T>(IQueryOver<T, T> criteria, Expression<Func<object>> expression ) { criteria.OrderBy(expression).Asc; } I'm guessing there is a way to do this, somehow bringing in the asc into the linq expression? Thanks for the help! 回答1: That's not how IQueryOver works... to make it compile, you'd have to do the following: protected static IQueryOver<T, T> AddOrder<T>(IQueryOver<T, T> criteria,

问题 I am having class which contain property which is list of some other class. I want to map this class to another class in queryable extension. AutoMappper.CreateMap<Department1, Department2>() AutoMapper.CreateMap<Employee1, Employee2>() var employee1 =_session.Query<Employee1>(); employee1.Project().To<Employee2>(); It give error 'Could not excecute query Only one expression can be specified in the select list when the subquery is not introduced with EXISTS.' select employee1_.Id as col_0_0_,

问题 I have a model, that contains a DateTime field and a Price field. I want to get a list that gives me an aggregation of month/year - price so for the data: 15/01/2012 200 16/01/2012 200 15/02/2012 300 16/02/2012 300 15/03/2012 400 16/03/2012 400 I will get: 01/2012 400 02/2012 600 03/2012 800 So far I didn't find a way to achive this using QueryOver. I keep getting "could not resolve property" when i try to look at the Month/Year parts of the date. Those questions: Group posts by year, then by

问题 I need to use the HQL object constructor feature , e.g: select new SomeClass(i.Id, i.Name) from Item i... But I also need to use the distinct keyword , as there are joins further down in the query, e.g.: select distinct i.Id from Item i I have tried this: but it just causes an Antlr exception, so I assume it's invalid syntax: select new SomeClass(distinct i.Id, i.Name) from Item i Is this possible? 回答1: Ah, it looks like this works: select distinct new SomeClass(i.Id, i.Name) from Item i...

问题 I have a convention UserTypeConvention<MyUserType> where MyUserType : IUserType where MyUserType handles an enum type MyEnum . I have configured Fluent NHibernate thusly sessionFactory = Fluently .Configure() .Database(MsSqlConfiguration.MsSql2005.ConnectionString( c => c.Is(connectionString)) ) .Mappings( m => m .FluentMappings .AddFromAssemblyOf<A>() .Conventions .AddFromAssemblyOf<A>() ) .BuildSessionFactory(); where A is a type in the same assembly as UserTypeConvention<MyUserType> and

问题 The references are unidirectional. The table (StoreProduct) for this entity is actually a join table that has these fields: Store_id Product_id ExtraBit So I went with an entity having a compoundID (store_id and product_id) and the ExtraBit is just a string: public class StoreProduct { protected StoreProduct():this(null,null,null){ } public StoreProduct(Store c_Store, Product c_Product, String c_ExtraBit) { Store = c_Store; Product = c_Product; ExtraBit = c_ExtraBit; } public virtual int