In this case yes, because References/many-to-one isn't a collection;
NHibernate needs the properties to be virtual so it can create a proxy to
detect when something tries to access the referenced object, at which point
it can go fetch the actual data.
On Mon, Jan 26, 2009 at 5:25 PM, <android...@gmail.com> wrote:
>
> So it's not possible to only lazy load associations/collections, the
> entire class has to be marked lazy load with every property set to
> virtual?
>
> On Jan 26, 12:07 pm, James Gregory <jagregory....@gmail.com> wrote:
> > I don't think this is an issue, you just have to set lazy on the class;
> > that's just how it's done. If you don't set lazy on the class, NHibernate
> > has no way of lazy loading it as it won't know how to create the proxy.
> >
> > On Mon, Jan 26, 2009 at 4:54 PM, VisualHint <cadil...@gmail.com> wrote:
> >
> > > And anyway, my first issue persists. I was able to reset default-lazy
> > > to false by using conventions. I don't put LazyLoad() on my class map
> > > and set it to my association only. I used WriteMappingsTo wo check
> > > that no lazy attribute is defined on the class and lazy="proxy" is
> > > defined on my association. With all that, my association is still
> > > eager loaded.
> >
> > > So would it be a NH issue instead of a FNH one ?
> >
> > > N.
> >
> > > On Jan 26, 10:57 am, VisualHint <cadil...@gmail.com> wrote:
> > > > I understand a bit better now but note that:
> >
> > > > 1. When I generate the hbm from FNH and both LazyLoad and
> > > > NotLazyLoaded are not set on the class, then no lazy attribute is
> > > > added to the hbm file which maybe contradicts what you say ("Fluent
> > > > NHibernate always sets something")
> >
> > > > 2. If your explanation is right, LazyLoad() on the association is
> > > > absolutely of no use.
> >
> > > > N.
> >
> > > > On Jan 26, 10:23 am, James Gregory <jagregory....@gmail.com> wrote:
> >
> > > > > That sounds correct to me. Whatever gets set on the class takes
> > > precedence
> > > > > over what you set in the relationship.
> > > > > HBM allowed you to not set anything for lazy load, while Fluent
> > > NHibernate
> > > > > always sets something; there's no way not to specify a value. So
> the
> > > lazy on
> > > > > the relationship is used when the entity doesn't have any kind of
> lazy
> > > > > setting, but if it does then it overrides whatever is set on the
> > > > > relationship; because FNH always sets a lazy value, it always
> overrides
> > > the
> > > > > relationship.
> >
> > > > > No bug here as far as I can tell, but the lazy on the references
> method
> > > is
> > > > > perhaps redundant.
> >
> > > > > On Mon, Jan 26, 2009 at 3:16 PM, VisualHint <cadil...@gmail.com>
> > > wrote:
> >
> > > > > > ok, so now that the default is lazy=true, I added NotLazyLoaded
> to my
> > > > > > classmap. I set LazyLoad on my association only and again it is
> not
> > > > > > lazy loaded.
> > > > > > If however, I remove NotLazyLoaded, then the default takes
> precedence
> > > > > > and with or without LazyLoad on my association, it is lazy
> loaded.
> > > > > > So I suspect something is wrong in the first case. The fault to
> NH
> > > > > > maybe (I'm with 2.1.0.1001).
> >
> > > > > > N.
> >
> > > > > > On Jan 26, 10:09 am, James Gregory <jagregory....@gmail.com>
> wrote:
> > > > > > > How are you getting your fluent mappings into nhibernate?
> > > default-lazy
> > > > > > > should definitely be true if you're running on the latest
> trunk.
> >
> > > > > > > On Mon, Jan 26, 2009 at 2:54 PM, VisualHint <
> cadil...@gmail.com>
> > > wrote:
> >
> > > > > > > > If I call System.Xml.XmlDocument doc = CreateMapping(new
> > > > > > > > FluentNHibernate.MappingVisitor());
> >
> > > > > > > > I get an hbm that has default-lazy=false and I can assure you
> > > that I
> > > > > > > > got the latest FNH from the trunk, rebuilt it and referenced
> it.
> > > The
> > > > > > > > various lazy settings are correctly added in the xml file for
> the
> > > 2
> > > > > > > > versions of LazyLoad() methods.
> > > > > > > > I don't touch to the conventions.
> > > > > > > > Configuration is done through the hibernate.cfg.xml and it
> > > contains
> > > > > > > > only the minimum:
> >
> > > > > > > > <?xml version="1.0" encoding="utf-8" ?>
> > > > > > > > <hibernate-configuration
> > > xmlns="urn:nhibernate-configuration-2.2">
> > > > > > > > <session-factory>
> > > > > > > > <property name="connection.connection_string">Server=.
> > > > > > > > \SQLEXPRESS;Database=mydb;Integrated
> Security=True;</property>
> > > > > > > > <property
> name="dialect">NHibernate.Dialect.MsSql2005Dialect</
> > > > > > > > property>
> > > > > > > > <property
> >
> > >
> name="connection.provider">NHibernate.Connection.DriverConnectionProvider</
> > > > > > > > property>
> > > > > > > > <property
> >
> > > name="connection.driver_class">NHibernate.Driver.SqlClientDriver</
> > > > > > > > property>
> > > > > > > > <property name="connection.release_mode">auto</property>
> > > > > > > > <property name="adonet.batch_size">500</property>
> >
> > > > > > > > <property name="show_sql">true</property>
> > > > > > > > <property name="generate_statistics">true</property>
> >
> > > > > > > > </session-factory>
> > > > > > > > </hibernate-configuration>
> >
> > > > > > > > On Jan 26, 9:45 am, James Gregory <jagregory....@gmail.com>
> > > wrote:
> > > > > > > > > By default the "default-lazy" attribute is set to true on
> every
> > > > > > mapping
> > > > > > > > > created by Fluent NHibernate, so unless you've overridden
> this
> > > using
> > > > > > the
> > > > > > > > > conventions, that's what's getting set. As far as I
> understand,
> > > this
> > > > > > > > infers
> > > > > > > > > the class level setting.
> > > > > > > > > How are you configuring your session factory? Could you
> write
> > > out
> > > > > > your
> > > > > > > > > mappings using the WriteMappingsTo method of the
> > > PersistenceModel,
> > > > > > then
> > > > > > > > we
> > > > > > > > > can see what's actually being generated.
> >
> > > > > > > > > On Mon, Jan 26, 2009 at 1:58 PM, VisualHint <
> > > cadil...@gmail.com>
> > > > > > wrote:
> >
> > > > > > > > > > I use the latest FNH and it still doesn't work. I have to
> > > > > > explicitely
> > > > > > > > > > set LazyLoad on the classmap to get this behavior.
> > > > > > > > > > I understand the difference between the 2 lazyload
> methods
> > > but I
> > > > > > don't
> > > > > > > > > > understand when you say:
> >
> > > > > > > > > > > however, the class gets precedence, so if your class
> isn't
> > > set
> > > > > > > > > > > to lazy load (which was the default) then the
> references
> > > call
> > > > > > won't
> > > > > > > > have
> > > > > > > > > > any
> > > > > > > > > > > effect.
> >
> > > > > > > > > > Logically, if the entity is not forced to LazLoad then
> > > calling it
> > > > > > or
> > > > > > > > > > not on the association WOULD MAKE a difference.
> > > > > > > > > > If you force it on the classmap then calling LazyLoad on
> the
> > > > > > > > > > association would not change anything. If a NotLazyLoaded
> was
> > > > > > possible
> > > > > > > > > > on the association, then this one would make a
> difference.
> > > No?
> >
> > > > > > > > > > About trying with hbm, unfortunately, I tried to learn
> FNH
> > > before
> > > > > > HBM
> > > > > > > > > > so this is not something I can immediately try.
> >
> > > > > > > > > > N.
> >
> > > > > > > > > > On Jan 26, 7:14 am, James Gregory <
> jagregory....@gmail.com>
> > > wrote:
> > > > > > > > > > > @Nicolas: How old is your copy of Fluent NHibernate?
> > > Originally
> > > > > > it
> > > > > > > > was
> > > > > > > > > > the
> > > > > > > > > > > default that all entities would be not lazy loaded; so
> if
> > > your
> > > > > > copy
> > > > > > > > is
> > > > > > > > > > from
> > > > > > > > > > > then, you won't see the lazy load behaviour.
> > > > > > > > > > > The two different lazy load methods you spoke of do
> > > different
> > > > > > things,
> > > > > > > > the
> > > > > > > > > > > lazy load on the class sets it at the entity level, so
> > > whenever
> > > > > > that
> > > > > > > > > > entity
> > > > > > > > > > > is referenced anywhere it's lazy loaded, the other sets
> it
> > > for
> > > > > > that
> > > > > > > > > > specific
> > > > > > > > > > > relationship; however, the class gets precedence, so if
> > > your
> > > > > > class
> > > > > > > > isn't
> > > > > > > > > > set
> > > > > > > > > > > to lazy load (which was the default) then the
> references
> > > call
> > > > > > won't
> > > > > > > > have
> > > > > > > > > > any
> > > > > > > > > > > effect.
> >
> > > > > > > > > > > As Seb said, the reason the class lazy load requires
> > > virtual
> > > > > > methods
> > > > > > > > is
> > > > > > > > > > > because it creates a proxy of the entity. If your
> methods
> > > aren't
> > > > > > > > already
> > > > > > > > > > > virtual, then your lazy loading won't be working
> because
> > > > > > NHibernate
> > > > > > > > won't
> > > > > > > > > > > know how to track it.
> >
> > > > > > > > > > > So what do you need to do? Update your copy of FNH and
> try
> > > again,
> > > > > > > > failing
> > > > > > > > > > > that, explicitly set lazy loading in your class and use
> > > virtuals;
> > > > > > > > that's
> > > > > > > > > > the
> > > > > > > > > > > recommended approach.
> >
> > > > > > > > > > > Please note, this isn't a Fluent NHibernate specific
> issue,
> > > you'd
> > > > > > be
> > > > > > > > > > seeing
> > > > > > > > > > > the same behaviour for standard xml mapping too.
> >
> > > > > > > > > > > On Mon, Jan 26, 2009 at 8:57 AM, Paul Batum <
> > > > > > paul.ba...@gmail.com>
> > > > > > > > > > wrote:
> > > > > > > > > > > > When it comes to issues such as this I am somewhat of
> a
> > > broken
> > > > > > > > record -
> > > > > > > > > > my
> > > > > > > > > > > > suggestion is always the same:
> >
> > > > > > > > > > > > See if you can get the desired behavior using HBM
> xml.
> > > Once you
> > > > > > > > have
> > > > > > > > > > > > working xml, we can compare it to what fluent
> nhibernate
> > > is
> > > > > > > > generating
> > > > > > > > > > and
> > > > > > > > > > > > see where the problem lies.
> >
> > > > > > > > > > > > Paul Batum
> >
> > > > > > > > > > > > On Mon, Jan 26, 2009 at 9:16 AM, Chris Marisic <
> > > > > > ch...@marisic.com>
> > > > > > > > > > wrote:
> >
> > > > > > > > > > > >> I noticed this also but I assumed I was handling the
> > > session
> > > > > > > > > > > >> incorrectly making it fully load the object but
> maybe
> > > this
> > > > > > > > actually is
> > > > > > > > > > > >> an issue.
> >
> > > > > > > > > > > >> On Jan 25, 9:20 am, VisualHint <cadil...@gmail.com>
> > > wrote:
> > > > > > > > > > > >> > Yes I know that Seb (thx anyway). This was just
> > > telling a
> > > > > > fact.
> > > > > > > > > > > >> > My question is about LazyLoad and why it has no
> effect
> > > when
> > > > > > > > called
> > > > > > > > > > on
> > > > > > > > > > > >> > a References() call.
> >
> > > > > > > > > > > >> > Nicolas
> >
> > > > > > > > > > > >> > On Jan 25, 3:44 am, Sebastien Lambla <
> > > s...@serialseb.com>
> > > > > > > > wrote:
> >
> > > > > > > > > > > >> > > > But
> >
> > ...
> >
> > read more ยป
>
> >
>
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