icriteria

I have a Person entity. Every person has a country, I want to select all the distinct countries that have people in them. This Criteria Query returns all the distinct CountryID's criteria.SetProjection(Projections.Distinct(Projections.Property("Country"))); How do I alter it to join and fetch the Country entity, not just the ID? Any easy way would be to use a subquery. That is, you could select the whole country on the outer query where the country ID matches the inner query. Subqueries.PropertyIn( "Country", innerDetachedCriteriaWhichFindsCountriesWithPeopleAndProjectsCountryId) 来源： https:/

In NHibernate you can easily benefit from first level cache when using Load or Get methods. But what about ICriteria , HQL , Linq-to-NHibernate and QueryOver ? Do they use first level cache too? They use it for returning entities, but the queries go straight to the db unless you use the second level cache. Consider this: var fooUsingGet = session.Get<Foo>(fooId); var fooQueryById = session.Query<Foo>().Single(f => f.Id == fooId); Two queries are executed (one for the Get, one for the Query), but both variables contain the same object reference. Now, if you enable the 2nd level cache, query

I want to create a query which has more than 3-4 Expression.Or ? But Expression.Or just let me to add two Expressions inside it. if (!string.IsNullOrEmpty(keyword)) query .Add(Expression.Or( Expression.Like("Name", keyword, MatchMode.Anywhere), Expression.Like("LastName", keyword, MatchMode.Anywhere))) .Add(Expression.Or( Expression.Like("Email1", keyword, MatchMode.Anywhere), Expression.Like("Email2", keyword, MatchMode.Anywhere))); The code above generates "Name like %this% or LastName like %this% AND Email1 like %this% and Email2 like %this. Thanks in advance. Use Disjunction instead of Or.

Can I use a Criteria to execute a t-sql command to select the max value for a column in a table? 'select @cus_id = max(id) + 1 from customers' Ta Ollie Use Projection : session.CreateCriteria(typeof(Customer)) .SetProjection( Projections.Max("Id") ) . UniqueResult(); Max(id) + 1 is a very bad way to generate ids. If that's your goal, find another way to generate ids. Edit: in answer to LnDCobra: it's bad because it's hard to make sure that the max(id) you got is still the max(id) when you do the insert. If another process inserts a row, your insert will have the same id, and your insert will

I have a legacy database that I am mapping using NHibernate. The objects of concern are an Account and a list of Notification objects. The objects look like: public class Notification { public virtual int Id { get; set; } public virtual DateTime BatchDate { get; set; } /* other properties */ public virtual Account Account { get; set; } } public class Account { public virtual int Id { get; set; } public virtual string AccountNumber { get; set; } /* other properties */ } The mapping files look like: <class name="Account" table="Account" dynamic-update="true"> <id name="Id" column="AccountID">

I needed to filter a list of results using the combination of two properties. A plain SQL statement would look like this: SELECT TOP 10 * FROM Person WHERE FirstName + ' ' + LastName LIKE '%' + @Term + '%' The ICriteria in NHibernate that I ended up using was: ICriteria criteria = Session.CreateCriteria(typeof(Person)); criteria.Add(Expression.Sql( "FirstName + ' ' + LastName LIKE ?", "%" + term + "%", NHibernateUtil.String)); criteria.SetMaxResults(10); It works perfectly, but I'm not sure if it is the ideal solution since I'm still learning about NHibernate's Criteria API. What are the