Hello again,
I found this interesting link
http://fabiomaulo.blogspot.com/2008/10/how-test-your-mappings-ghostbuster.html
where I could understood
why my entity was getting updated.
In my model I have a class named [Client] which utilize an enumerator as custom
type,
well, my model said the ColumnType for Status property was Int32, while in the
fact it was of ClientStatus Type
[Property("Status"), ColumnType="Int32"]
public virtual ClientStatus Status
{
get { return _status; }
set { _status = value; }
}
NHbibernate doesn't throws any execption because ClientStatus is convertible to
Int32
but when the session is disposed, NHibernate see my Client model as dirty.
All I had to do was to remove this column type and it looks like this now:
[Property("Status")]
public virtual ClientStatus Status
{
get { return _status; }
set { _status = value; }
}
Everything is perfect know!
Hope this thread helps some other people like it helps me
Thank you Makus..
----- Original Message -----
From: Markus Zywitza
To: [email protected]
Sent: Thursday, July 09, 2009 9:31 AM
Subject: Re: Why AR is Updating When Performing a Select
you can add an PreUpdateEventListener and compare the cached and actual
object states to find the changes.
-Markus
2009/7/9 Cesar Sanz <[email protected]>
Hello markus and Thanx
using (new SessionScope(FlushAction.Never)) did works!
>Normally, if there is no change in the objects, nothing happens (the
entities are not dirty).
Normally?? Is there a chance that this happens without entities not been
dirty?
>If you experience flushing after a simple load, check whether your code
changes anything in the entities.
I followed my code and no changes are made. Is there a way to check if my
entity is dirty? Can NHibernate shows me
the changes...
Thanx for answering
----- Original Message -----
From: Markus Zywitza
To: [email protected]
Sent: Thursday, July 09, 2009 12:02 AM
Subject: Re: Why AR is Updating When Performing a Select
When AR/NH loads entities, it puts them into a cache. When the
session(scope) disposes, the objects in the cache are checked whether they have
been changed and the changes are written back (flushed) to the DB.
Normally, if there is no change in the objects, nothing happens (the
entities are not dirty). If you experience flushing after a simple load, check
whether your code changes anything in the entities.
As a workaround, you can load your entities in a separate read-only
sessionscope:
using (new SessionScope(FlushAction.Never))
{
// Load here
}
// Don't access lazy properties here!!!
The downside is that you can't access lazy properties in your view
templates.
-Markus
2009/7/9 [email protected] <[email protected]>
Hello..
I am in a hurry cuz I have to release a small project.
I use AR for this project, my model is simple,
[Client] has many [Product]
This is used in a web application, so a new session is opened on each
request.
The point is.. when I perform a Client.FindAll() it select all the
clients (which is desirable) but at
the end of the request, I can see AR is updating each and every client
that found..
I see no changes are really made.. So, I don't know what is happening
under the hood..
I appreciate any kind of help.
Best regards
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