nhibernate

问题 I have just started to learn NHibernate, and are following tutorials. On my own learning project, I have made up a problem for myself. I have two tables: Team: TeamId* Name Match: MatchId* TeamAId TeamBId The model entities are: Team public virtual int? TeamId { get; private set; } public virtual string Name { get; set; } public virtual IList<Match> HomeMatches { get; set; } public virtual IList<Match> AwayMatches { get; set; } Match public virtual int? MatchId { get; private set; } public

问题 I have this in my entity: public virtual Iesi.Collections.Generic.ISet<long> Blas { get; set; } and this for my mapping: mapping.HasMany(x => x.Blas).AsSet().Element("Value", m => m.Type<long>()); This creates the relevant tables and I add data like this: X.Blas = new Iesi.Collections.Generic.HashedSet<long>(); X.Blas.Add(some_long); This adds values to the object but the values in Blas are never persisted (everything else of X is). Can anyone see anything wrong? Thanks. Christian 回答1: if X

问题 With Fluent NHibernate , I have an arbitrary ClassMap<T> , I want to be able to find out what property (if any) was set as the primary key . Example: public class PersonMap : ClassMap<Person> { public PersonMap() { Id(p => p.StupidPrimaryKeyId).GeneratedBy.Identity().Column("StupidPrimaryKeyId"); } } ... //usage MemberInfo primaryKeyMember = FindPrimaryKey(new PersonMap()); Can anybody tell me what the method body for FindPrimaryKey would have to be in order to return StupidPrimaryKeyId ?

问题 I have the following piece of code: 1: ids = GetAnArrayOfIds(); 2: jobEntities = jobEntities.Where(j => j.Locations.Select(l => l.Id).Any(ids.Contains)); How do I write 2 using QueryOver ? Thank you, 回答1: var results = session.QueryOver<Job>() .JoinQueryOver<Location>(u => u.Locations) .Where(loc => loc.Id.IsIn(ids)) .TransformUsing(Transformers.DistinctRootEntity) .List(); Hope this helps 来源： https://stackoverflow.com/questions/6997146/nhibernate-linq-query-to-queryover

问题 So... already said it: How to change FlushMode to Commit in C#? I mean, In Fluent NHibernate FlushMode by default is setted as Auto. So... to set FluentMode to Commit , I need to open session and then change It: var someSessionFactory = ... bla bla ..; var session = someSessionFactory.OpenSession(); session.FlushMode = FlushMode.Commit; This will work but... this will mean that I need to call method which contains FlushMode.Commit each time I am opening session. To inicialize sessionFactory I

问题 Following on from my previous question How to implement LastUpdate in NHibernate Entities?. I have two columns on my audited tables in my database: created datetime default getdate() not null (the creation date of this row) lastUpdate datetime null (the datetime this row was last updated) I want to create a listener for updates only in NHibernate, because the database engine takes care of new records with the default constraint. I tried to create a Custom listener with this code: public class

问题 We have a program where users can specify their database connection parameters. The usual suspects including host, port, username, password, and table name. We are connecting to the database using NHibernate. What we'd like to do is be able to build the configuration with NHibernate and then test the connection parameters before continuing with other operations; notifying the user of failure. Is this possible to do through NHibernate, or will it require using each database type we support's

问题 I have an entity with a property which I wish to be readonly - meaning that when I insert this entity to the DB, SqlServer will generate the property's value automatically so I need nhibernate to ignore this property when executing the INSERT command but retrieve it when selecting the entity. Important note: this property isn't ID ! I don't want NHibernate to initialize it using generator, SqlServer will do it by itself. And another note: I use configuration mapping so no fluent mapping

问题 For some reason i can't get this query right, and i can't understand why... I have an object called 'Blog' that has an Id, and a list of 'Tag's. Each 'Tag' has an id and a 'Name' property. Since this is a many to many relationship, I have another table called 'blog_tags' connecting them. The mappings look like this : public class BlogsMapping : ClassMap<Blog> { Table("blogs"); Id(x => x.Id).GeneratedBy.Identity(); Map(x => x.Content); HasManyToMany(x => x.Tags) .Table("Blog_Tags")

问题 I am using NHibernate to connect to a legacy rdbms system. Under high production load the rdbms service fails. To maintain the availability we have a failover rdbms service. Is there a way to configure NHibernate to use the FailOver Connection String when the primary connection is down? Additional Info: I am using Castle over NHibernate. If Castle provides handling of failover connections then that will also do it for me. 回答1: You can build your own NHibernate.Connection.IConnectionProvider