queryover

问题 I have database structure for Plans and PlanVersions in following relationship: +------+ +-------------+ | Plan | --------------> | PlanVersion | +------+ 1 (1..n) +-------------+ PlanVersion is version table tracking all version changes and it have ActiveFromData and ActiveToData columns show us when was this version active. Plan also can have SubPlans which can change in time so PlanVersion also have ParrentPlanId column which tell us what was current subplan for version. What i want is to

问题 Right now I'm using the Criteria API and loving it, but it would be even better if I could make the switch to the QueryOver API. However, my setup is a little strange. In order to partition data into tables, I have one base abstract class: Listing and a number of classes which inherit from that: Listing_UK Listing_US etc. With the criteria API, I can do something like: Type t = typeof(Listing_UK); if (condition) t = typeof(Listing_US); DbSession.CreateCriteria(t) .Add(Restriction.Eq("field"

问题 I have been searching the internet and can't find an example on how to use the queryover of nhibernate 3.0 For example I would like to use the string functions on the where clause of the queryover ex: var item = Query.Where(x => x.Name.ToLower() == name.ToLower()).FirstOrDefault(); But this doesn't work, because nhibernate can't understand the ToLower, so how can extend the dialect in a way that this becomes possible? 回答1: session.QueryOver<Foo>() .Where(Restrictions.Eq( Projections

问题 We are using ICriteria and now we would like to switch to more readable QueryOver in Nhibernate Can someone give me a hint how to convert this generic pagination logic for Icriteria to QueryOver? public static PagedList<T> PagedList<T>(this ICriteria criteria, ISession session, int pageIndex, int pageSize) where T : class { if (pageIndex < 0) pageIndex = 0; var countCrit = (ICriteria)criteria.Clone(); countCrit.ClearOrders(); // so we don’t have missing group by exceptions var results =

问题 I have 2 entities (These are broken down to question to be simpler): Entity A public class EntityA { protected IList<EntityB> _bList = new List<EntityB>(); virtual public int Id { get; set; } virtual public int ExtId { get; set; } public virtual void AddB(EntityB b) { if (!_bList.Contains(b)) _bList.Add(b); b.A = this; b.ExtId = this.ExtId; } public virtual void RemoveB(EntityB b) { _bList.Remove(b); } public virtual IList<EntityB> BList { get { return _bList.ToList().AsReadOnly(); } } }

问题 I have the following model: public class User { public virtual int Id { get; set; } public virtual string Username { get; set; } public virtual string Password { get; set; } public virtual string Email { get; set; } public IList<SubmissionNote> Notes { get;set; } } public class SubmissionNote { public virtual Int64 Id { get; set; } public virtual string Text { get; set; } public virtual DateTime CreatedOn { get; set; } public virtual User Creator { get; set; } public virtual Submission

问题 I'm using NHibernate and I have come across a problem. I have this entities in my project: Client: public class Client { public virtual int Id { get; set; } public virtual string Name { get; set; } public virtual string UserName { get; set; } public virtual string Password { get; set; } public virtual IList<Date> Dates { get; set; } public Client() { Dates = new List<Date>(); } } Date: public class Date { public virtual int Id { get; set; } public virtual DateTime DateTime { get; set; }

问题 I'm using NHibernate and I have come across a problem. I have this entities in my project: Client: public class Client { public virtual int Id { get; set; } public virtual string Name { get; set; } public virtual string UserName { get; set; } public virtual string Password { get; set; } public virtual IList<Date> Dates { get; set; } public Client() { Dates = new List<Date>(); } } Date: public class Date { public virtual int Id { get; set; } public virtual DateTime DateTime { get; set; }

问题 I'm trying to add a certain numbers of OR conditions using disjunction on X number of entities that implements a certain interface containing date information. My problem is that when the SQL is generated all my disjunction conditions points to the root entity of my QueryOver. I have created a generic method to add my conditions public static QueryOver<T,T2> AddChangedCondition<T,T2>(this QueryOver<T,T2> query, DateTime from, DateTime to, Disjunction disjunction) where T2 : IHaveDate { if

问题 I need to do a subquery on a sub collection but I can't get it to work. I tried this Task tAlias = null; List<Task> result = session.QueryOver<Task>(() => tAlias) .Where(Restrictions.In(Projections.Property(() => tAlias.Course.Id), courseIds)) .WithSubquery.WhereExists(QueryOver.Of<CompletedTask>().Where(x => x.Student.StudentId == settings.StudentId)) ().ToList(); Yet I get Cannot use subqueries on a criteria without a projection. 回答1: session.QueryOver<Task>(() => tAlias)