Load collections eagerly in NHibernate using Criteria API
- by Zuber
I have an entity A which HasMany entities B and entities C. All entities A, B and C have some references x,y and z which should be loaded eagerly.
I want to read from the database all entities A, and load the collections of B and C eagerly using criteria API.
So far, I am able to fetch the references in 'A' eagerly. But when the collections are loaded, the references within them are lazily loaded.
Here is how I do it
AllEntities_A =
_session.CreateCriteria(typeof(A))
.SetFetchMode("x", FetchMode.Eager)
.SetFetchMode("y", FetchMode.Eager)
.List<A>().AsQueryable();
The mapping of entity A using Fluent is as shown below. _B and _C are private ILists for B & C respectively in A.
Id(c => c.SystemId);
Version(c => c.Version);
References(c => c.x).Cascade.All();
References(c => c.y).Cascade.All();
HasMany<B>(Reveal.Property<A>("_B"))
.AsBag()
.Cascade.AllDeleteOrphan()
.Not.LazyLoad()
.Inverse()
.Cache.ReadWrite().IncludeAll();
HasMany<C>(Reveal.Property<A>("_C"))
.AsBag()
.Cascade.AllDeleteOrphan()
.LazyLoad()
.Inverse()
.Cache.ReadWrite().IncludeAll();
I don't want to make changes to the mapping file, and would like to load the entire entity A eagerly. i.e. I should get a List of A's where there will be List of B's and C's whose reference properties will also be loaded eagerly
