How to achieve an eagerly loaded, filtered child collection with the NHibernate criteria API

Posted by vakman on Stack Overflow See other posts from Stack Overflow or by vakman
Published on 2010-05-08T07:37:43Z Indexed on 2010/05/08 7:48 UTC
Read the original article Hit count: 179

Filed under:

nhibernate

Is it possible to use the criteria api to load a set of parent objects along with a filtered, eagerly loaded set of child objects? I'm trying to query a list of categories and at the same time load the categories products that start with the letter M. The query below gives me the results I want but the Products are not eagerly loaded, that is NHibernate performs additional queries when I enumerate the Product collection:

 var categoriesWithProducts = session.CreateCriteria<Category>()
    .SetFetchMode("Products", FetchMode.Eager)
    .CreateCriteria("Products")
    .Add(Expression.Like("Name", "M%"))
    .List<Category>();

What am I missing here?

Related posts about nhibernate

How can I eager-load a child collection mapped to a non-primary key in NHibernate 2.1.2?

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, I have two objects with a many-to-many relationship between them, as follows: public class LeftHandSide { public LeftHandSide() { Name = String.Empty; Rights = new HashSet<RightHandSide>(); } public int Id { get; set; } public string Name { get; set;… >>> More
Nhibernate 2.1 and mysql 5 - InvalidCastException on Setup

as seen on Stack Overflow - Search for 'Stack Overflow'
Hello there, I am trying to use NHibernate with Spring.Net und mySQL 5. However, when setting up the connection and creating the SessionFactoryObject, I get this InvalidCastException: NHibernate seems to cast MySql.Data.MySqlClient.MySqlConnection to System.Data.Common.DbConnection which causes… >>> More
Nhibernate transactions:Avoiding Nhibernate dependency in the service layer

as seen on Stack Overflow - Search for 'Stack Overflow'
One of practices advocated by Nhibernate experts is to do all actions in inside a transaction. In a typical 3 tier web architecture, Nhibernate depedency is limited the data layer. In such a case is it fine to use using (var tr = NHibernateSession.Current.BeginTransaction()) { at the controller… >>> More
Series of abstract classes and NHibernate

as seen on Stack Overflow - Search for 'Stack Overflow'
Hello, and first off thanks for your time to look at this. For a research project I'm working on, I have a somewhat complex design (which I've been given) to persist to a database via NHibernate. Here's an example of the class hierarchy: TransitStrategy, TransportationCompany and TransportationLocation… >>> More
Using Time columns with NHibernate, Fluent NHibernate and SQL Server 2008

as seen on Stack Overflow - Search for 'Stack Overflow'
Hello, I have a table with a time column in my SQL Server 2008 database. The property of the object I'm trying to map to is a TimeSpan. How can i tell FluentNHibernate to use the TimeAsTimeSpan NHibernate type, so that I don't have cast problems? >>> More

Developer IT

How to achieve an eagerly loaded, filtered child collection with the NHibernate criteria API - Developer IT

How to achieve an eagerly loaded, filtered child collection with the NHibernate criteria API

nhibernate

Related posts about nhibernate

How can I eager-load a child collection mapped to a non-primary key in NHibernate 2.1.2?

Nhibernate 2.1 and mysql 5 - InvalidCastException on Setup

Nhibernate transactions:Avoiding Nhibernate dependency in the service layer

Series of abstract classes and NHibernate

Using Time columns with NHibernate, Fluent NHibernate and SQL Server 2008

Categories cloud