nhibernate

问题 We have some code written which depends on working with the IQueryable instances, so I suppose we are stuck with having to use ISession.Query<>() . In one particular case I would like to only partially hydrate the DBOs and exclude certain columns from the SELECT statement which NHibernate will generate. Is it possible to achieve that while using Query<> ? Alternatively, is it possible to somehow go from ICriteria to IQueryable ? (I think for ICriteria it is possible to achieve what I need by

问题 I have an stored procedure returning data from multiple tables. in nhibernate we create class for each table. is it required to create class for each table it is returning and then relating that class with each other. is there any other way of doing it like creating a class that contain all the fields returned by stored procedure thanks 回答1: I haven't worked with stored procedures, but you can definitely create a class that maps to a view and not just to a table. By the way, if you're using

问题 I am having the worst trouble trying to setup a HasMany relationship to an entity backed by a table with no primary key. ClassA has a CompositeId . To circumvent the lack of a primary key on ClassB , I tried to create a CompositeId on ClassB that was comprised all of the columns in the table. No matter what I've tried, nothing has worked. These are my classes and mappings. public class ClassA { public virtual int a_1_id {get;set;} public virtual string a_2_id {get;set;} public virtual IList

问题 Our Orchard CMS with multi-tenancy just went down. We have since brought it back online by restoring a version of the database, and then recycling the application pool. Communicating with the restored database continued to fail until we recycled the app pool. The post-mortem analysis of the error log from yesterday had zero errors, and the error log from today has about forty errors with the following pattern: About 20 SqlException errors reporting "invalid login" for two of the tenant

问题 I wonder what is the best way to manage NHibernate Session Context when using NH data layer from Xsockets controller. Particularly I refer to self hosted winservice/console application or Azure worker role, where HTTPContext is not available. Of course there is always an option to create and dispose session per call, but that means a performance hit, so better reuse sessions in some way. My controller provides API for CRUD operations in underlying NH repository and is pushing updates to

问题 Is it possible to do ORM mapping between classes and the DB using Linq to SQL or NHibernate just by using attributes on the models? For eg: If you use Parse.com as the backend, establishing a relationship between the DB and the class is as simple as: [ParseClassName("itemsForSale")] //Name of the table public class Item : ParseObject { [ParseFieldName("userId")] //Name of the column public string UserId { get { return GetProperty<string>(); } set { SetProperty<string>(value); } } } Nothing

问题 I have two tables in Oracle Entity ---------- **EntityId** NUMBER(9), **EntityName** VARCHAR2 EntityLinks -------------- **EntityLinkId** NUMBER(9),**ParentEntityId** NUMBER(9), **ChildEntityId** NUMBER(9) Table EntityLinks will store ManyToMany relationship between various entities. ParentEntityId and ChildEntityId are having foreign key relationship with Entity . I have below a below class for Entity as well public class Entity { public virtual int EntityId {get; set} public virtual IList

问题 I'm trying to implement Membership controls in a mvc 2 application and i'm having trouble dealing with the MembershipUser class. I have my own data store (in Postgresql) and I'm using Nhibernate to deal with it from C#. The thing is, I have my own user class, but I can't use it with any provider I found that implements Membership, because all the functions return the predefined MembershipUser class and cannot return my own. I'm losing my mind here, is there any way i can work with this, or

问题 I am using NHibernate 3.0 with MySQL as the database. On my localhost, I can connect to the database and do everything I want to. However, whenever I upload the files to the production server, I get an error which states: "A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: SQL

问题 I have a method similar to the following, which I need to return all Groups that begin with the letter I'm passing in: public IList<CompanyGroupInfo> GetGroupByQuery(string letter) { IList<CompanyGroupInfo> result = null; result = _session .CreateCriteria<CompanyGroupInfo>() .Add(SqlExpression.Like<CompanyGroupInfo>(g => g.Name, letter)) .List<CompanyGroupInfo>(); return (result.Count > 0) ? result[0] : null; } I'm brand new to NHibernate, so I don't really know what to do here. In my mind,