Thank you for the response, I'll dig into it.
On Mar 21, 6:13 pm, Fabio Maulo <[email protected]> wrote:
> IMO, the best way is using a specific <tuplizer> (PocoEntityTuplizer); Don't
> look for docu, there isn't.A little example about
> tuplizer:http://fabiomaulo.blogspot.com/2008/10/less-than-few-is-gof.html
>
> 2009/3/21 dhtroy <[email protected]>
>
>
>
>
>
> > Fabio -
>
> > My apologies, my terminology is messed up here ... we're hydrating an
> > entity from 2 different DB.
>
> > On Mar 21, 1:22 pm, Fabio Maulo <[email protected]> wrote:
> > > I don't understand.You are hydrating a DTO (not an entity) from 2 DB ?
>
> > > 2009/3/21 dhtroy <[email protected]>
>
> > > > Fabio,
>
> > > > Your first answer makes sense, I was expecting that, but thought I
> > > > should ask to make certain I understood what was happening.
>
> > > > As for your second answer, I'm not sure I was clear on what we're
> > > > attempting to do, so let me try to explain it again:
>
> > > > We have a new SQL database that NHibernate is directly connected to
> > > > and we have a legacy database that we cannot connect up to NHibernate,
> > > > but one we must retrieve a pre-defined amount of data from. We had
> > > > hoped to be able to achieve this goal by using the new Event system in
> > > > NHib 2.0. As data is loaded into the DTOs, we would grab what we need
> > > > from the legacy file system, putting that data into the DTO as they
> > > > are hydrated from the newer SQL database.
>
> > > > Having said that, and knowing that this legacy system cannot be
> > > > connected to NHibernate, and yet we need to pull data from both the
> > > > newer SQL database and the old legacy database, and load all that into
> > > > a single DTO, can you offer guidance on what direction I could pursue,
> > > > if what we were trying to do isn't going to work?
>
> > > > Thank you.
>
> > > > On Mar 20, 5:27 pm, Fabio Maulo <[email protected]> wrote:
> > > > > 2009/3/20 dhtroy <[email protected]>
>
> > > > > > I have implemented IPostLoadEventListener and in this listener, for
> > a
> > > > > > specific parent object, I want to populate some data fields in that
> > > > > > object, as well as some of the data in that parent's child
> > > > > > collections.
>
> > > > > > I have two issues that I need to resolve:
>
> > > > > > #1 - when I access the child object collections, NHibernate
> > recurses
> > > > > > out of that call and goes and loads the child. I would expect this
> > to
> > > > > > happen if Lazy loading was enabled, but it's not. Is this expected
> > > > > > behavior?
>
> > > > > Without lazy loading children are loaded immediately after load
> > parent or
> > > > > with parent is you are using fetch=join.
> > > > > You can use "join fect" (higher loading) in a HQL/Criteria, even for
> > > > > multiple collections, but only if the entity have at most one <bag>
> > (to
> > > > know
> > > > > why think about the SQL).
>
> > > > > > #2 - after the parent object loads, then all the children are
> > loaded,
> > > > > > but if I need to populate some of those child collections with
> > data,
> > > > > > for that specific parent object type, how do I determine that the
> > > > > > object coming through the Load Event Listener belongs to the
> > patient
> > > > > > object I am trying to load data for (hoping there is a field I can
> > key
> > > > > > off of).
>
> > > > > Probably you are delegating business matters to the DAL and probably
> > > > because
> > > > > of that you are having this kind of "problems".
>
> > > > > > More specifically, we want to inject specific data into our DTO
> > after
> > > > > > it's read through NHibernate. I had thought doing this in a
> > PostLoad
> > > > > > event would have already hydrated the entire object, child
> > collections
> > > > > > and all, if lazy loading were disabled, but that doesn't appear to
> > be
> > > > > > the case.
>
> > > > > > Advise more welcome.
>
> > > > > --
> > > > > Fabio Maulo
>
> > > --
> > > Fabio Maulo
>
> --
> Fabio Maulo
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